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CHEMISTRY (597 journals)                  1 2 3 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 7)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26)
ACS Catalysis     Full-text available via subscription   (Followers: 31)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 17)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 23)
ACS Macro Letters     Full-text available via subscription   (Followers: 22)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 39)
ACS Nano     Full-text available via subscription   (Followers: 218)
ACS Photonics     Full-text available via subscription   (Followers: 10)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 20)
Acta Chemica Iasi     Open Access   (Followers: 2)
Acta Chimica Sinica     Full-text available via subscription  
Acta Chimica Slovaca     Open Access   (Followers: 1)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 7)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 5)
Advanced Functional Materials     Hybrid Journal   (Followers: 48)
Advanced Science Focus     Free   (Followers: 3)
Advances in Chemical Engineering and Science     Open Access   (Followers: 53)
Advances in Chemical Science     Open Access   (Followers: 12)
Advances in Chemistry     Open Access   (Followers: 12)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 18)
Advances in Drug Research     Full-text available via subscription   (Followers: 22)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 14)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 18)
Advances in Nanoparticles     Open Access   (Followers: 12)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15)
Advances in Polymer Science     Hybrid Journal   (Followers: 40)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 18)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Science and Technology     Full-text available via subscription   (Followers: 10)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 2)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 65)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 14)
American Journal of Chemistry     Open Access   (Followers: 25)
American Journal of Plant Physiology     Open Access   (Followers: 13)
American Mineralogist     Full-text available via subscription   (Followers: 12)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 153)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 204)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 1)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 3)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 7)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 14)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Hybrid Journal  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 6)
Applied Spectroscopy     Full-text available via subscription   (Followers: 22)
Applied Surface Science     Hybrid Journal   (Followers: 26)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 2)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Atomization and Sprays     Full-text available via subscription   (Followers: 3)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 9)
Biochemistry     Full-text available via subscription   (Followers: 278)
Biochemistry Insights     Open Access   (Followers: 5)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 9)
Bioinspired Materials     Open Access   (Followers: 3)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 2)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access  
Biomacromolecules     Full-text available via subscription   (Followers: 18)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Biomedical Chromatography     Hybrid Journal   (Followers: 6)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 109)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 99)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 2)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 2)
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Canadian Journal of Chemistry     Full-text available via subscription   (Followers: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 3)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 67)
Catalysis for Sustainable Energy     Open Access   (Followers: 6)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 7)
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemCatChem     Hybrid Journal   (Followers: 8)
Chemical and Engineering News     Free   (Followers: 12)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 69)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 23)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 19)
Chemical Reviews     Full-text available via subscription   (Followers: 165)
Chemical Science     Open Access   (Followers: 21)
Chemical Technology     Open Access   (Followers: 15)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 4)
Chemical Week     Full-text available via subscription   (Followers: 7)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 55)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 25)
ChemInform     Hybrid Journal   (Followers: 7)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 6)
Chemistry & Biology     Full-text available via subscription   (Followers: 30)
Chemistry & Industry     Hybrid Journal   (Followers: 5)
Chemistry - A European Journal     Hybrid Journal   (Followers: 137)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 15)
Chemistry and Materials Research     Open Access   (Followers: 17)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry International     Hybrid Journal   (Followers: 2)
Chemistry Letters     Full-text available via subscription   (Followers: 43)
Chemistry of Materials     Full-text available via subscription   (Followers: 189)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry-Didactics-Ecology-Metrology     Open Access  
ChemistryOpen     Open Access   (Followers: 2)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 2)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 8)
ChemPlusChem     Hybrid Journal   (Followers: 2)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 10)
Chromatographia     Hybrid Journal   (Followers: 23)
Chromatography Research International     Open Access   (Followers: 7)
Clay Minerals     Full-text available via subscription   (Followers: 9)
Cogent Chemistry     Open Access  
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 10)
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 8)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 3)
Combustion Science and Technology     Hybrid Journal   (Followers: 18)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 2)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 9)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 12)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 9)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 2)
Copernican Letters     Open Access  
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 5)
Crystal Structure Theory and Applications     Open Access   (Followers: 3)
CrystEngComm     Full-text available via subscription   (Followers: 10)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Metabolomics     Hybrid Journal   (Followers: 4)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Research in Chemistry     Open Access   (Followers: 8)
Current Science     Open Access   (Followers: 48)
Dalton Transactions     Full-text available via subscription   (Followers: 18)
Detection     Open Access   (Followers: 2)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)
Diamond and Related Materials     Hybrid Journal   (Followers: 11)
Dislocations in Solids     Full-text available via subscription  
Doklady Chemistry     Hybrid Journal  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 3)
Eclética Química     Open Access   (Followers: 1)
Ecological Chemistry and Engineering S     Open Access   (Followers: 4)
Ecotoxicology and Environmental Contamination     Open Access  
Educación Química     Open Access   (Followers: 1)
Education for Chemical Engineers     Hybrid Journal   (Followers: 5)
EJNMMI Radiopharmacy and Chemistry     Open Access  
Elements     Full-text available via subscription   (Followers: 2)
Environmental Chemistry     Hybrid Journal   (Followers: 8)
Environmental Chemistry Letters     Hybrid Journal   (Followers: 4)
Environmental Science & Technology Letters     Full-text available via subscription   (Followers: 5)
Environmental Science : Nano     Partially Free   (Followers: 1)
Environmental Toxicology & Chemistry     Hybrid Journal   (Followers: 19)

        1 2 3 | Last

Journal Cover Advances in Colloid and Interface Science
  [SJR: 2.314]   [H-I: 130]   [18 followers]  Follow
   Full-text available via subscription Subscription journal
   ISSN (Print) 0001-8686
   Published by Elsevier Homepage  [3031 journals]
  • Resolving an ostensible inconsistency in calculating the evaporation rate
           of sessile drops
    • Authors: S.F. Chini; A. Amirfazli
      Pages: 121 - 128
      Abstract: Publication date: May 2017
      Source:Advances in Colloid and Interface Science, Volume 243
      Author(s): S.F. Chini, A. Amirfazli
      This paper resolves an ostensible inconsistency in the literature in calculating the evaporation rate for sessile drops in a quiescent environment. The earlier models in the literature have shown that adapting the evaporation flux model for a suspended spherical drop to calculate the evaporation rate of a sessile drop needs a correction factor; the correction factor was shown to be a function of the drop contact angle, i.e. f ( θ ). However, there seemed to be a problem as none of the earlier models explicitly or implicitly mentioned the evaporation flux variations along the surface of a sessile drop. The more recent evaporation models include this variation using an electrostatic analogy, i.e. the Laplace equation (steady-state continuity) in a domain with a known boundary condition value, or known as the Dirichlet problem for Laplace's equation. The challenge is that the calculated evaporation rates using the earlier models seemed to differ from that of the recent models (note both types of models were validated in the literature by experiments). We have reinvestigated the recent models and found that the mathematical simplifications in solving the Dirichlet problem in toroidal coordinates have created the inconsistency. We also proposed a closed form approximation for f ( θ ) which is valid in a wide range, i.e. 8°≤ θ ≤131°. Using the proposed model in this study, theoretically, it was shown that the evaporation rate in the CWA (constant wetted area) mode is faster than the evaporation rate in the CCA (constant contact angle) mode for a sessile drop.
      Graphical abstract image

      PubDate: 2017-05-07T01:00:57Z
      DOI: 10.1016/j.cis.2016.05.015
      Issue No: Vol. 243 (2017)
  • Monitoring the different micelle species and the slow kinetics of
           tetraethylammonium perfluorooctane-sulfonate by 19F NMR spectroscopy
    • Authors: Xiaolin Wang; Jingfei Chen Dong Wang Shuli Dong Jingcheng Hao
      Abstract: Publication date: Available online 26 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Xiaolin Wang, Jingfei Chen, Dong Wang, Shuli Dong, Jingcheng Hao, Heinz Hoffmann
      Since we lack effective tools that can monitor the structures of surfactant micelles in situ, the different equilibrium species and the slow kinetics of micelles are still not well understood. Herein, by using 19F NMR, we simultaneously monitored that micelles of tetraethylammonium perfluorooctanesulfonate (TPFOS, C8F17SO3N(C2H5)4) in water grow more complex in virtue of hydrophobic counterions and the slow kinetic exchange process exists in the system. Apart from the monomeric signals, three sets of micelle signals which correspond to spherical micelles, wormlike/wormlike micelles with rings in end caps and toroidal micelles were successfully detected on the NMR time scale because of the slow exchange rate for surfactant molecules between the monomer and the micelle states. By comparison, other fluoro- and hydrocarbon surfactants with different tail lengths and counterions (+ N(CH3)4, + N(C3H7)4, Li+ and Na+) have been studied, and the coexistence of different micelles could also been observed for the aqueous solution of C9F19COON(CH3)4. However, only one set of averaged NMR signals could be observed for these surfactants. The micellization of TPFOS in water is demonstrated to be a predominantly entropy-driven process. Molecular dynamics (MD) simulation revealed an unusual distribution of counterions, providing further understanding of the mechanism of the micelle formation process.
      Graphical abstract image

      PubDate: 2017-05-27T03:25:07Z
  • Electro-optic Kerr effect in the study of mixtures of oppositely charged
           colloids. The case of polymer-surfactant mixtures in aqueous solutions
    • Authors: Ritacco
      Abstract: Publication date: Available online 15 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Hernán A. Ritacco
      In this review I highlight a very sensitive experimental technique for the study of polymer-surfactant complexation: The electro-optic Kerr effect. This review does not intend to be exhaustive in covering the Kerr Effect nor polymer-surfactant systems, instead it aims to call attention to an experimental technique that, even if applied in a qualitative manner, could give very rich and unique information about the structures and aggregation processes occurring in mixtures of oppositely charged colloids. The usefulness of electric birefringence experiments in the study of such systems is illustrated by selected results from literature in hope of stimulating the realization of more birefringence experiments on similar systems. This review is mainly aimed at, but not restricted to, researchers working in polyelectrolyte-surfactant mixtures in aqueous solutions, Kerr effect is a powerful experimental tool that could be used in the study of many systems in diverse areas of colloidal physics.
      Graphical abstract image

      PubDate: 2017-05-16T20:32:31Z
  • Formulation, stabilisation and encapsulation of bacteriophage for phage
    • Authors: Danish J. Malik; Ilya J. Sokolov; Gurinder V. Vinner; Francesco Mancuso; Salvatore Cinquerrui; Goran T. Vladisavljevic; Martha R.J. Clokie; Natalie J. Garton; Andrew G.F. Stapley; Anna Kirpichnikova
      Abstract: Publication date: Available online 14 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Danish J. Malik, Ilya J. Sokolov, Gurinder V. Vinner, Francesco Mancuso, Salvatore Cinquerrui, Goran T. Vladisavljevic, Martha R.J. Clokie, Natalie J. Garton, Andrew G.F. Stapley, Anna Kirpichnikova
      Against a backdrop of global antibiotic resistance and increasing awareness of the importance of the human microbiota, there has been resurgent interest in the potential use of bacteriophages for therapeutic purposes, known as phage therapy. A number of phage therapy phase I and II clinical trials have concluded, and shown phages don't present significant adverse safety concerns. These clinical trials used simple phage suspensions without any formulation and phage stability was of secondary concern. Phages have a limited stability in solution, and undergo a significant drop in phage titre during processing and storage which is unacceptable if phages are to become regulated pharmaceuticals, where stable dosage and well defined pharmacokinetics and pharmacodynamics are de rigueur. Animal studies have shown that the efficacy of phage therapy outcomes depend on the phage concentration (i.e. the dose) delivered at the site of infection, and their ability to target and kill bacteria, arresting bacterial growth and clearing the infection. In addition, in vitro and animal studies have shown the importance of using phage cocktails rather than single phage preparations to achieve better therapy outcomes. The in vivo reduction of phage concentration due to interactions with host antibodies or other clearance mechanisms may necessitate repeated dosing of phages, or sustained release approaches. Modelling of phage-bacterium population dynamics reinforces these points. Surprisingly little attention has been devoted to the effect of formulation on phage therapy outcomes, given the need for phage cocktails, where each phage within a cocktail may require significantly different formulation to retain a high enough infective dose. This review firstly looks at the clinical needs and challenges (informed through a review of key animal studies evaluating phage therapy) associated with treatment of acute and chronic infections and the drivers for phage encapsulation. An important driver for formulation and encapsulation is shelf life and storage of phage to ensure reproducible dosages. Other drivers include formulation of phage for encapsulation in micro- and nanoparticles for effective delivery, encapsulation in stimuli responsive systems for triggered controlled or sustained release at the targeted site of infection. Encapsulation of phage (e.g. in liposomes) may also be used to increase the circulation time of phage for treating systemic infections, for prophylactic treatment or to treat intracellular infections. We then proceed to document approaches used in the published literature on the formulation and stabilisation of phage for storage and encapsulation of bacteriophage in micro- and nanostructured materials using freeze drying (lyophilization), spray drying, in emulsions e.g. ointments, polymeric microparticles, nanoparticles and liposomes. As phage therapy moves forward towards Phase III clinical trials, the review concludes by looking at promising new approaches for micro- and nanoencapsulation of phages and how these may address gaps in the field.
      Graphical abstract image

      PubDate: 2017-05-16T20:32:31Z
      DOI: 10.1016/j.cis.2017.05.014
  • Foams: From nature to industry
    • Authors: Christopher Hill; Julian Eastoe
      Abstract: Publication date: Available online 12 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Christopher Hill, Julian Eastoe
      This article discusses different natural and man-made foams, with particular emphasis on the different modes of formation and stability. Natural foams, such as those produced on the sea or by numerous creatures for nests, are generally stabilised by dissolved organic carbon (DOC) molecules or proteins. In addition to this, foam nests are stabilised by multifunctional mixtures of surfactants and proteins called ranaspumins, which act together to give the required physical and biochemical stability. With regards to industrial foams, the article focuses on how various features of foams are exploited for different industrial applications. Stability of foams will be discussed, with the main focus on how the chemical nature and structure of surfactants, proteins and particles act together to produce long-lived stable foams. Additionally, foam destabilisation is considered, from the perspective of elucidation of the mechanisms of instability determined spectroscopically or by scattering methods.
      Graphical abstract image

      PubDate: 2017-05-16T20:32:31Z
      DOI: 10.1016/j.cis.2017.05.013
  • Colloid particle formulations for antimicrobial applications
    • Authors: Ahmed F. Halbus; Tommy S. Horozov; Vesselin N. Paunov
      Abstract: Publication date: Available online 12 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Ahmed F. Halbus, Tommy S. Horozov, Vesselin N. Paunov
      Colloidal particles are being extensively studied in various antimicrobial applications due to their small size to volume ratio and ability to exhibit a wide spectrum of antibacterial, antifungal, antialgal and antiviral action. The present review focuses on various nanoparticles (NPs) of inorganic, organic and hybrid materials, and discusses some of the methods for their preparation as well as mechanisms of their antimicrobial action. We consider the antimicrobial applications of metal oxide nanoparticles (ZnO, MgO, CuO, Cu2O, Al2O3, TiO2, CeO2 and Y2O3), metal nanoparticles (NPs), such as copper, silver and gold, metal hydroxide NPs such as Mg(OH)2 as well as hybrid NPs made from biodegradable materials, such as chitosan, lignin and dextran, loaded with other antimicrobial agents. Recent developments for targeted delivery of antimicrobials by using colloid antibodies for microbial cell shape and surface recognition are also discussed. We also consider recent advances in the functionalization of nanoparticles and their potential antimicrobial applications as a viable alternative of conventional antibiotics and antiseptic agents which can help to tackle antimicrobial resistance. The review also covers the recently developed environmentally benign NPs (EbNPs) as a “safer-by-design” green chemistry solution of the post use fate of antimicrobial nanomaterials.
      Graphical abstract image

      PubDate: 2017-05-16T20:32:31Z
      DOI: 10.1016/j.cis.2017.05.012
  • Atomic force microscopy: From red blood cells to immunohaematology
    • Authors: Natasha Yeow; Rico F. Tabor; Gil Garnier
      Abstract: Publication date: Available online 11 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Natasha Yeow, Rico F. Tabor, Gil Garnier
      Atomic force microscopy (AFM) offers complementary imaging modes that can provide morphological and structural details of red blood cells (RBCs), and characterize interactions between specific biomolecules and RBC surface antigen. This review describes the applications of AFM in determining RBC health by the observation of cell morphology, elasticity and surface roughness. Measurement of interaction forces between plasma proteins and antibodies against RBC surface antigen using the AFM also brought new information to the immunohaematology field. With constant improvisation of the AFM in resolution and imaging time, the reaction of RBC to changes in the physico-chemistry of its environment and the presence of RBC surface antigen specific-biomolecules is achievable.
      Graphical abstract image

      PubDate: 2017-05-12T01:02:46Z
      DOI: 10.1016/j.cis.2017.05.011
  • Molecular design of flotation collectors: A recent progress
    • Authors: Guangyi Liu; Xianglin Yang; Hong Zhong
      Abstract: Publication date: Available online 10 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Guangyi Liu, Xianglin Yang, Hong Zhong
      The nature of froth flotation is to selectively hydrophobize valuable minerals by collector adsorption so that the hydrophobized mineral particles can attach air bubbles. In recent years, the increasing commercial production of refractory complex ores has been urgent to develop special collectors for enhancing flotation separation efficiency of valuable minerals from these ores. Molecular design methods offer an effective way for understanding the structure-property relationship of flotation collectors and developing new ones. The conditional stability constant (CSC), molecular mechanics (MM), quantitative structure-activity relationship (QSAR), and first-principle theory, especially density functional theory (DFT), have been adopted to build the criteria for designing flotation collectors. Azole-thiones, guanidines, acyl thioureas and thionocarbamates, amide-hydroxamates, and double minerophilic-group surfactants such as Gemini, dithiourea and dithionocarbamate molecules have been recently developed as high-performance collectors. To design hydrophobic groups, the hydrophilic-hydrophobic balance parameters have been extensively used as criteria. The replacement of aryl group with aliphatic group or CC single bond(s) with CC double bond(s), reduction of carbon numbers, introduction of oxygen atom(s) and addition of trisiloxane to the tail terminal have been proved to be useful approaches for adjusting the surface activity of collectors. The role of molecular design of collectors in practical flotation applications was also summarized. Based on the critical review, some comments and prospects for further research on molecular design of flotation collectors were also presented in the paper.
      Graphical abstract image

      PubDate: 2017-05-12T01:02:46Z
      DOI: 10.1016/j.cis.2017.05.008
  • Physicochemical and colloidal aspects of food matrix effects on
           gastrointestinal fate of ingested inorganic nanoparticles
    • Authors: David Julian McClements; Hang Xiao; Philip Demokritou
      Abstract: Publication date: Available online 9 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): David Julian McClements, Hang Xiao, Philip Demokritou
      Inorganic nanoparticles, such as titanium dioxide, silicon dioxide, iron oxide, zinc oxide, or silver nanoparticles, are added to some food products and food packaging materials to obtain specific functional attributes, such as lightening, powder flow, nutrition, or antimicrobial properties. These engineered nanomaterials (ENMs) all have dimensions below 100nm, but may still vary considerably in composition, morphology, charge, surface properties and aggregation state, which effects their gastrointestinal fate and potential toxicity. In addition to their intrinsic physicochemical and morphological properties, the extrinsic properties of the media they are suspended in also affects their biotransformation, gastrointestinal fate and bioactivity. For instance, inorganic nanoparticles are usually consumed as part of a food or meal that contains numerous other components, such as lipids, proteins, carbohydrates, surfactants, minerals, and water, which may alter their gastrointestinal fate. This review article provides an overview of the potential effects of food components on the behavior of ENMs in the gastrointestinal tract (GIT), and highlights some important physicochemical and colloidal mechanisms by which the food matrix may alter the properties of inorganic nanoparticles. This information is essential for developing appropriate test methods to establish the potential toxicity and biokinetics of inorganic nanoparticles in foods.
      Graphical abstract image

      PubDate: 2017-05-12T01:02:46Z
      DOI: 10.1016/j.cis.2017.05.010
  • Porous structure of ion exchange membranes investigated by various
    • Authors: N. Kononenko; V. Nikonenko; D. Grande; C. Larchet; L. Dammak; M. Fomenko; Yu. Volfkovich
      Abstract: Publication date: Available online 9 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): N. Kononenko, V. Nikonenko, D. Grande, C. Larchet, L. Dammak, M. Fomenko, Yu. Volfkovich
      A comparative review of various techniques is provided: mercury intrusion porosimetry, nitrogen sorption porosimetry, differential scanning calorimetry (DSC)-based thermoporosimetry, and standard contact porosimetry (SCP), which allows determining pore volume distribution versus pore radius/water binding energy in ion-exchange membranes (IEMs). IEMs in the swollen state have a labile structure involving micro-, meso- and macropores, whose size is a function of the external water vapor pressure. For such materials, the most appropriate methods for quantifying their porosity are DSC and SCP. Especially significant information is given by the SCP method allowing measuring porosimetric curves in a very large pore size range from 1 to 105 nm. Experimental results of water distribution in homogeneous and heterogeneous commercial and modified IEMs are presented. The effect of various factors on water distribution is reviewed, i.e. nature of polymeric matrix and functional groups, method for membrane preparation, membrane ageing. A special attention is given to the effect of membrane modification by embedding nanoparticles in their structure. The porosimetric curves are considered along with the results of electrochemical characterization involving the measurements of membrane conductivity, as well as diffusion and electroosmotic permeability. It is shown that addition of nanoparticles may lead to either increase or decrease of water content in IEMs, different ranges of pore size being affected. Hybrid membranes modified with hydrated zirconium dioxide exhibit much higher permselectivity in comparison with the pristine membranes. The diversity of the responses of membrane properties to their modification allows for formation of membranes suitable for fuel cells, electrodialysis or other applications.

      PubDate: 2017-05-12T01:02:46Z
      DOI: 10.1016/j.cis.2017.05.007
  • Recent advances in smart biotechnology: Hydrogels and nanocarriers for
           tailored bioactive molecules depot
    • Authors: Gesmi Milcovich; Stefania Lettieri; Filipe E. Antunes; Bruno Medronho; Ana C. Fonseca; Jorge F.J. Coelho; Paolo Marizza; Francesca Perrone; Rossella Farra; Barbara Dapas; Gabriele Grassi; Mario Grassi; Silvia Giordani
      Abstract: Publication date: Available online 9 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Gesmi Milcovich, Stefania Lettieri, Filipe E. Antunes, Bruno Medronho, Ana C. Fonseca, Jorge F.J. Coelho, Paolo Marizza, Francesca Perrone, Rossella Farra, Barbara Dapas, Gabriele Grassi, Mario Grassi, Silvia Giordani
      Over the past ten years, the global biopharmaceutical market has remarkably grown, with ten over the top twenty worldwide high performance medical treatment sales being biologics. Thus, biotech R&D (research and development) sector is becoming a key leading branch, with expanding revenues. Biotechnology offers considerable advantages compared to traditional therapeutic approaches, such as reducing side effects, specific treatments, higher patient compliance and therefore more effective treatments leading to lower healthcare costs. Within this sector, smart nanotechnology and colloidal self-assembling systems represent pivotal tools able to modulate the delivery of therapeutics. A comprehensive understanding of the processes involved in the self-assembly of the colloidal structures discussed therein is essential for the development of relevant biomedical applications. In this review we report the most promising and best performing platforms for specific classes of bioactive molecules and related target, spanning from siRNAs, gene/plasmids, proteins/growth factors, small synthetic therapeutics and bioimaging probes.
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      PubDate: 2017-05-12T01:02:46Z
      DOI: 10.1016/j.cis.2017.05.009
  • Incorporation of ion and solvent structure into mean-field modeling of the
           electric double layer
    • Authors: Klemen Bohinc; Guilherme Volpe Bossa; Sylvio May
      Abstract: Publication date: Available online 5 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Klemen Bohinc, Guilherme Volpe Bossa, Sylvio May
      An electric double layer forms when the small mobile ions of an electrolyte interact with an extended charged object, a macroion. The competition between electrostatic attraction and translational entropy loss of the small ions results in a diffuse layer of partially immobilized ions in the vicinity of the macroion. Modeling structure and energy of the electric double layer has a long history that has lead to the classical Poisson-Boltzmann theory and numerous extensions that account for ion-ion correlations and structural ion and solvent properties. The present review focuses on approaches that instead of going beyond the mean-field character of Poisson-Boltzmann theory introduce structural details of the ions and the solvent into the Poisson-Boltzmann modeling framework. The former include not only excluded volume effects but also the presence of charge distributions on individual ions, spatially extended ions, and internal ionic degrees of freedom. The latter treat the solvent either explicitly as interacting Langevin dipoles or in the form of effective non-electrostatic interactions, in particular Yukawa interactions, that are added to the Coulomb potential. We discuss how various theoretical models predict structural properties of the electric double layer such as the differential capacitance and compare some of these predictions with computer simulations.
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      PubDate: 2017-05-07T01:00:57Z
      DOI: 10.1016/j.cis.2017.05.001
  • Recent developments in drug eluting devices with tailored interfacial
    • Authors: Eva Sanchez-Rexach; Emilio Meaurio; Jose-Ramon Sarasua
      Abstract: Publication date: Available online 4 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Eva Sanchez-Rexach, Emilio Meaurio, Jose-Ramon Sarasua
      Drug eluting devices have greatly evolved during past years to become fundamental products of great marketing importance in the biomedical field. There is currently a large diversity of highly specialized devices for specific applications, making the development of these devices an exciting field of research. The replacement of the former bare metal devices by devices loaded with drugs allowed the sustained and controlled release of drugs, to achieve the desired local therapeutic concentration of drug. The newer devices have been “engineered” with surfaces containing micro- and nanoscale features in a well-controlled manner, that have shown to significantly affect cellular and subcellular function of various biological systems. For example, the topography can be structured to form an antifouling surface mimicking the defense mechanisms found in nature, like the skin of the shark. In the case of bone implants, well-controlled nanostructured interfaces can promote osteoblast differentiation and matrix production, and enhance short-term and long-term osteointegration. In any case, the goal of current research is to design implants that induce controlled, guided, and rapid healing. This article reviews recent trends in the development of drug eluting devices, as well as recent developments on the micro/nanotechnology scales, and their future challenges. For this purpose medical devices have been divided according to the different systems of the body they are focused to: orthopedic devices, breathing stents, gastrointestinal and urinary systems, devices for cardiovascular diseases, neuronal implants, and wound dressings.
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      PubDate: 2017-05-07T01:00:57Z
      DOI: 10.1016/j.cis.2017.05.005
  • Interfacial characteristics of binary polymer blend films spread at the
           air-water interface
    • Authors: Masami Kawaguchi
      Abstract: Publication date: Available online 4 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Masami Kawaguchi
      The interfacial characteristics of binary polymer blend films spread at the air-water interface are reviewed, focusing on their surface pressures, interfacial structures, and dilational moduli as a function of the miscibility. Miscible polymer blend films show thermodynamic, structural, and dynamic properties which are a combination of those from both components in the polymer blend present at the air-water interface. No preferential adsorption is observed and the behavior does not depend on the surface concentration regime. In contrast, for immiscible polymer blend films, preferential adsorption of one polymer phase occurs at the air-water interface and the interfacial characteristics in the semi-dilute and concentrated regimes are strongly controlled by one of the components of the adsorbed polymer.
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      PubDate: 2017-05-07T01:00:57Z
      DOI: 10.1016/j.cis.2017.05.004
  • Multicomponent nanocrystals with anti-Stokes luminescence as contrast
           agents for modern imaging techniques
    • Authors: A.N. Generalova; B.N. Chichkov; E.V. Khaydukov
      Abstract: Publication date: Available online 4 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): A.N. Generalova, B.N. Chichkov, E.V. Khaydukov
      Lanthanide-doped upconversion nanoparticles (UCNPs) have recently attracted great attention in theranostics due to their exceptional optical and physicochemical properties, which enable the design of a novel UCNP-based nanoplatform for luminescent imaging, temperature mapping, sensing, and therapy. In addition, UCNPs are considered to be ideal building blocks for development of multimodal probes for cells and whole body imaging, exploiting simple variation of host matrix, dopant ions, and surface chemistry. Modalities responsible for magnetic resonance imaging (MRI), computed tomography (CT), and positron emission tomography (PET)/single-photon emission computed tomography (SPECT) are embedded in a single UC nanocrystal, providing integrating effect over any modality alone in terms of the efficiency and sensitivity for clinical innovative diagnosis through multimodal bioimaging. In particular, we demonstrate applications of UCNPs as a new nanoplatform for optical and multimodal cancer imaging in vitro and in vivo and extend discussions to delivery of UCNP-based therapeutic agents for photodynamic and photothermal cancer treatments.
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      PubDate: 2017-05-07T01:00:57Z
      DOI: 10.1016/j.cis.2017.05.006
  • HAP nanoparticle and substrate surface electrical potential towards bone
           cells adhesion: Recent results review
    • Authors: Vladimir Bystrov; Anna Bystrova; Yuri Dekhtyar
      Abstract: Publication date: Available online 3 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Vladimir Bystrov, Anna Bystrova, Yuri Dekhtyar
      Nanostructured hydroxyapatite (HAP) and its nanoparticles are widely used for implantation into the human organism. The biocompatibility of the implants depends very much on the interaction between the implant and the cells regenerating tissue to be connected to the implant. An implant surface electrical charged density plays an important role in these processes. Possible instruments managing the surface electrical potential of HAP are in the focus of this paper. Both theoretical and experimental results evidence that: - the surface electrical charge density of the nanoparticle depends on its size and shape; - the electrical charge density of HAP could be engineered by contact less technique because of deposition of the electrical charge from the external radiation source, surface couples reconstruction.
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      PubDate: 2017-05-07T01:00:57Z
      DOI: 10.1016/j.cis.2017.05.002
  • Iron oxide nanoparticles – In vivo/in vitro biomedical applications
           and in silico studies
    • Authors: Miroslava Nedyalkova; Borjana Donkova; Julia Romanova; George Tzvetkov; Sergio Madurga; Vasil Simeonov
      Abstract: Publication date: Available online 3 May 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Miroslava Nedyalkova, Borjana Donkova, Julia Romanova, George Tzvetkov, Sergio Madurga, Vasil Simeonov
      The review presents a broad overview of the biomedical applications of surface functionalized iron oxide nanoparticles (IONPs) as magnetic resonance imaging (MRI) agents for sensitive and precise diagnosis tool and synergistic combination with other imaging modalities. Then, the recent progress in therapeutic applications, such as hyperthermia is discussed and the available toxicity data of magnetic nanoparticles concerning in vitro and in vivo biomedical applications are addressed. This review also presents the available computer models using molecular dynamics (MD), Monte Carlo (MC) and density functional theory (DFT), as a basis for a complete understanding of the behaviour and morphology of functionalized IONPs, for improving NPs surface design and expanding the potential applications in nanomedicine.
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      PubDate: 2017-05-07T01:00:57Z
      DOI: 10.1016/j.cis.2017.05.003
  • ifc (ed board)
    • Abstract: Publication date: May 2017
      Source:Advances in Colloid and Interface Science, Volume 243

      PubDate: 2017-05-07T01:00:57Z
  • Bio-templated silica composites for next-generation biomedical
    • Authors: Karunya Albert; Xin-Chun Huang; Hsin-Yun Hsu
      Abstract: Publication date: Available online 29 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Karunya Albert, Xin-Chun Huang, Hsin-Yun Hsu
      Silica-based materials have extensive biomedical applications owing to their unique physical, chemical, and biological properties. Recently, increasing studies have examined the mechanisms involved in biosilicification to develop novel, fine-tunable, eco-friendly materials and/or technologies. In this review, we focus on recent developments in bio-templated silica synthesis and relevant applications in drug delivery systems, tissue engineering, and biosensing.
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      PubDate: 2017-05-01T02:08:02Z
      DOI: 10.1016/j.cis.2017.04.011
  • Probing the threshold of membrane damage and cytotoxicity effects induced
           by silica nanoparticles in Escherichia coli bacteria
    • Authors: Marion Mathelié-Guinlet; Laure Béven; Fabien Moroté; Daniel Moynet; Christine Grauby-Heywang; Ibtissem Gammoudi; Marie-Hélène Delville; Touria Cohen-Bouhacina
      Abstract: Publication date: Available online 28 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Marion Mathelié-Guinlet, Laure Béven, Fabien Moroté, Daniel Moynet, Christine Grauby-Heywang, Ibtissem Gammoudi, Marie-Hélène Delville, Touria Cohen-Bouhacina
      The engineering of nanomaterials, because of their specific properties, is increasingly being developed for commercial purposes over the past decades, to enhance diagnosis, cosmetics properties as well as sensing efficiency. However, the understanding of their fate and thus their interactions at the cellular level with bio-organisms remains elusive. Here, we investigate the size- and charge-dependence of the damages induced by silica nanoparticles (SiO2-NPs) on Gram-negative Escherichia coli bacteria. We show and quantify the existence of a NPs size threshold discriminating toxic and inert SiO2-NPs with a critical particle diameter (Φc) in the range 50nm–80nm. This particular threshold is identified at both the micrometer scale via viability tests through Colony Forming Units (CFU) counting, and the nanometer scale via atomic force microscopy (AFM). At this nanometer scale, AFM emphasizes the interaction between the cell membrane and SiO2-NPs from both topographic and mechanical points of view. For SiO2-NPs with Φ>Φc no change in E. coli morphology nor its outer membrane (OM) organization is observed unless the NPs are positively charged in which case reorganization and disruption of the OM are detected. Conversely, when Φ<Φc, E. coli exhibit unusual spherical shapes, partial collapse, even lysis, and OM reorganization.
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      PubDate: 2017-05-01T02:08:02Z
      DOI: 10.1016/j.cis.2017.04.012
  • Lipid vesicles in pulsed electric fields: Fundamental principles of the
           membrane response and its biomedical applications
    • Authors: Dayinta L. Perrier; Lea Rems; Pouyan E. Boukany
      Abstract: Publication date: Available online 28 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Dayinta L. Perrier, Lea Rems, Pouyan E. Boukany
      The present review focuses on the effects of pulsed electric fields on lipid vesicles ranging from giant unilamellar vesicles (GUVs) to small unilamellar vesicles (SUVs), from both fundamental and applicative perspectives. Lipid vesicles are the most popular model membrane systems for studying biophysical and biological processes in living cells. Furthermore, as vesicles are made from biocompatible and biodegradable materials, they provide a strategy to create safe and functionalized drug delivery systems in health-care applications. Exposure of lipid vesicles to pulsed electric fields is a common physical method to transiently increase the permeability of the lipid membrane. This method, termed electroporation, has shown many advantages for delivering exogenous molecules including drugs and genetic material into vesicles and living cells. In addition, electroporation can be applied to induce fusion between vesicles and/or cells. First, we discuss in detail how research on cell-size GUVs as model cell systems has provided novel insight into the basic mechanisms of cell electroporation and associated phenomena. Afterwards, we continue with a thorough overview how electroporation and electrofusion have been used as versatile methods to manipulate vesicles of all sizes in different biomedical applications. We conclude by summarizing the open questions in the field of electroporation and possible future directions for vesicles in the biomedical field.
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      PubDate: 2017-05-01T02:08:02Z
      DOI: 10.1016/j.cis.2017.04.016
  • Nano-carrier based drug delivery systems for sustained antimicrobial agent
           release from orthopaedic cementous material
    • Authors: Yazan Al Thaher; Stefano Perni; Polina Prokopovich
      Abstract: Publication date: Available online 27 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Yazan Al Thaher, Stefano Perni, Polina Prokopovich
      Total joint replacement (TJR), such as hip and knee replacement, is a popular procedure worldwide. Prosthetic joint infections (PJI) after this procedure have been widely reported, where treatment of such infections is complex with high cost and prolonged hospital stay. In cemented arthroplasties, the use of antibiotic loaded bone cement (ALBC) is a standard practice for the prophylaxis and treatment of PJI. Recently, the development of bacterial resistance by pathogenic microorganisms against most commonly used antibiotics increased the interest in alternative approaches for antimicrobial delivery systems such as nanotechnology. This review summarizes the efforts made to improve the antimicrobial properties of PMMA bone cements using nanotechnology based antibiotic and non-antibiotic delivery systems to overcome drawbacks of ALBC in the prophylaxis and treatment of PJIs after hip and knee replacement.
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      PubDate: 2017-05-01T02:08:02Z
      DOI: 10.1016/j.cis.2017.04.017
  • Applications of artificial neural networks for adsorption removal of dyes
           from aqueous solution: A review
    • Authors: Abdol Mohammad Ghaedi; Azam Vafaei
      Abstract: Publication date: Available online 26 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Abdol Mohammad Ghaedi, Azam Vafaei
      Artificial neural networks (ANNs) have been widely applied for the prediction of dye adsorption during the last decade. In this paper, the applications of ANN methods, namely multilayer feedforward neural networks (MLFNN), support vector machine (SVM), and adaptive neuro fuzzy inference system (ANFIS) for adsorption of dyes are reviewed. The reported researches on adsorption of dyes are classified into four major categories, such as (i) MLFNN, (ii) ANFIS, (iii) SVM and (iv) hybrid with genetic algorithm (GA) and particle swarm optimization (PSO). Most of these papers are discussed. The further research needs in this field are suggested. These ANNs models are obtaining popularity as approaches, which can be successfully employed for the adsorption of dyes with acceptable accuracy.
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      PubDate: 2017-05-01T02:08:02Z
      DOI: 10.1016/j.cis.2017.04.015
  • Colloidal 2D nanosheets of MoS2 and other transition metal dichalcogenides
           through liquid-phase exfoliation
    • Authors: Ekaterina D. Grayfer; Mariia N. Kozlova; Vladimir E. Fedorov
      Abstract: Publication date: Available online 25 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Ekaterina D. Grayfer, Mariia N. Kozlova, Vladimir E. Fedorov
      This review focuses on the exfoliation of transition metal dichalcogenides MQ2 (TMD, M=Mo, W etc., Q=S, Se) in liquid media, leading to the formation of 2D nanosheets dispersed in colloids. Nowadays, colloidal dispersions of MoS2, MoSe2, WS2 and other related materials are considered for a wide range of applications, including electronic and optoelectronic devices, energy storage and conversion, sensors for gases, catalysts and catalyst supports, biomedicine etc. We address various methods developed so far for transferring these materials from bulk to nanoscale thickness, and discuss their stabilization and factors influencing it. Long-time known exfoliation through Li intercalation has received renewed attention in recent years, and is recognized as a method yielding highest dispersed concentrations of single-layer MoS2 and related materials. Latest trends in the intercalation/exfoliation approach include electrochemical lithium intercalation, experimenting with various intercalating agents, multi-step intercalation etc. On the other hand, direct sonication in solvents is a much simpler technique that allows one to avoid dangerous reagents, long reaction times and purifying steps. The influence of the solvent characteristics on the colloid formation was closely investigated in numerous recent studies. Moreover, it is being recognized that, besides solvent properties, sonication parameters and solvent transformations may affect the process in a crucial way. The latest data on the interaction of MoS2 with solvents evidences that not only solution thermodynamics should be employed to understand the formation and stabilization of such colloids, but also general and organic chemistry. It appears that due to the sonolysis of the solvents and cutting of the MoS2 layers in various directions, the reactive edges of the colloidal nanosheets may bear various functionalities, which participate in their stabilization in the colloidal state. In most cases, direct exfoliation of MQ2 into colloidal nanosheets is conducted in organic solvents, while a small amount of works report low-concentrated colloids in pure water. To improve the dispersion abilities of transition metal dichalcogenides in water, various stabilizers are often introduced into the reaction media, and their interactions with nanosheets play an important role in the stabilization of the dispersions. Surfactants, polymers and biomolecules usually interact with transition metal dichalcogenide nanosheets through non-covalent mechanisms, similarly to the cases of graphene and carbon nanotubes. Finally, we survey covalent chemical modification of colloidal MQ2 nanosheets, a special and different approach, consisting in the functionalization of MQ2 surfaces with help of thiol chemistry, interaction with electrophiles, or formation of inorganic coordination complexes. The intentional design of surface chemistry of the nanosheets is a very promising way to control their solubility, compatibility with other moieties and incorporation into hybrid structures. Although the scope of the present review is limited to transition metal dichalcogenides, the dispersion in colloids of other chalcogenides (such as NbS3, VS4, Mo2S3 etc.) in many ways follows similar trends. We conclude the review by discussing current challenges in the area of exfoliation of MoS2 and its related materials.
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      PubDate: 2017-05-01T02:08:02Z
      DOI: 10.1016/j.cis.2017.04.014
  • Layered double hydroxides as the next generation inorganic anion
           exchangers: Synthetic methods versus applicability
    • Authors: Natalia Chubar; Robert Gilmour; Vasyl Gerda; Matej Mičušík; Maria Omastova; Katja Heister; Pascal Man; Jacques Fraissard; Vladimir Zaitsev
      Abstract: Publication date: Available online 25 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Natalia Chubar, Robert Gilmour, Vasyl Gerda, Matej Mičušík, Maria Omastova, Katja Heister, Pascal Man, Jacques Fraissard, Vladimir Zaitsev
      This work is the first report that critically reviews the properties of layered double hydroxides (LDHs) on the level of speciation in the context of water treatment application and dynamic adsorption conditions, as well as the first report to associate these properties with the synthetic methods used for LDH preparation. Increasingly stronger maximum allowable concentrations (MAC) of various contaminants in drinking water and liquid foodstuffs require regular upgrades of purification technologies, which might also be useful in the extraction of valuable substances for reuse in accordance with modern sustainability strategies. Adsorption is the main separation technology that allows the selective extraction of target substances from multicomponent solutions. Inorganic anion exchangers arrived in the water business relatively recently to achieve the newly approved standards for arsenic levels in drinking water. LDHs (or hydrotalcites, HTs) are theoretically the best anion exchangers due to their potential to host anions in their interlayer space, which increases their anion removal capacity considerably. This potential of the interlayer space to host additional amounts of target aqueous anions makes the LDHs superior to bulk anion exchanger. The other unique advantage of these layered materials is the flexibility of the chemical composition of the metal oxide-based layers and the interlayer anions. However, until now, this group of “classical” anion exchangers has not found its industrial application in adsorption and catalysis at the industrial scale. To accelerate application of LDHs in water treatment on the industrial scale, the authors critically reviewed recent scientific and technological knowledge on the properties and adsorptive removal of LDHs from water on the fundamental science level. This also includes review of the research tools useful to reveal the adsorption mechanism and the material properties beyond the nanoscale. Further, these properties are considered in association with the synthetic methods by which the LDHs were produced. Special attention is paid to the LDH properties that are particularly relevant to water treatment, such as exchangeability ease of the interlayer anions and the LDH stability at the solid-water interface. Notably, the LDH properties (e.g., rich speciation, hydration, and the exchangeability ease of the interlayer anions with aqueous anions) are considered in the synthetic strategy context applied to the material preparation. One such promising synthetic method has been developed by the authors who supported their opinions by the unpublished data in addition to reviewing the literature. The reviewing approach allowed for establishing regularities between the parameters: the LDH synthetic method―structure/surface/interlayer―removal―suitability for water treatment. Specifically, this approach allowed for a conclusion about either the unsuitability or promising potential of some synthetic methods (or the removal approaches) used for the preparation of LDHs for water purification at larger scales. The overall reviewing approach undertaken by the authors in this work mainly complements the other reviews on LDHs (published over the past seven to eight years) and for the first time compares the properties of these materials beyond the nanoscale.

      PubDate: 2017-05-01T02:08:02Z
      DOI: 10.1016/j.cis.2017.04.013
  • Milk fat globules and associated membranes: Colloidal properties and
           processing effects
    • Authors: Annamari Jukkola; Orlando J. Rojas
      Abstract: Publication date: Available online 21 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Annamari Jukkola, Orlando J. Rojas
      The composition and physical-chemical properties of the milk fat globule membrane (MFGM) is a subject that has gained increased interest in the field of food colloids, mainly because the nutritional and technological value of the MFGM. In fact, related changes in integrity and structure during milk processing pose a huge challenge as far as efforts directed to isolate the components of the fat globule membrane. MFGM characteristics and potential utilization are areas of contention. Thus, the effects of processing and the colloidal interactions that exist with other milk constituents need to be better understood in order to exploit milk fat and MFGM, their functionality as colloids as well as those of their components. These are the main subjects of this review, which also reports on the results of recent inquiries into MFGM structure and colloidal behavior.
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      PubDate: 2017-04-24T05:21:54Z
      DOI: 10.1016/j.cis.2017.04.010
  • Engineering and delivery of nanocolloids of hydrophobic drugs
    • Authors: Luyang Zhao; Guizhi Shen; Guanghui Ma; Xuehai Yan
      Abstract: Publication date: Available online 20 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Luyang Zhao, Guizhi Shen, Guanghui Ma, Xuehai Yan
      A lot of efforts have been devoted to engineering the delivery of hydrophobic drugs due to the high demand of chemotherapy against cancer. While early developed liposomes and polymeric nanoparticles did not meet the requirements of high drug loading efficiency, pure drug nanoparticles appeared to meet these together with high stability. Current drug delivery systems demand an improved performance over the whole aspects of stability, loading capacity, and therapeutic effects. As a result, both new techniques based on traditional methods and totally new procedures are under investigation. In this review, we focus on the evaluation of pure drug nanolloids fabricated by different engineering protocols with emphasis on the size and morphology, delivery and controlled release, and therapeutic effects of these drug nanocolloids.
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      PubDate: 2017-04-24T05:21:54Z
      DOI: 10.1016/j.cis.2017.04.008
  • Layer-by-Layer polyelectrolyte assemblies for encapsulation and release of
           active compounds
    • Authors: Eduardo Guzmán; Ana Mateos-Maroto; Marta Ruano; Francisco Ortega; Ramón G. Rubio
      Abstract: Publication date: Available online 20 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Eduardo Guzmán, Ana Mateos-Maroto, Marta Ruano, Francisco Ortega, Ramón G. Rubio
      Soft assemblies obtained following the Layer-by-Layer (LbL) approach are accounted among the most interesting systems for designing biomaterials and drug delivery platforms. This is due to the extraordinary versatility and flexibility offered by the LbL method, allowing for the fabrication of supramolecular multifunctional materials using a wide range of building blocks through different types of interactions (electrostatic, hydrogen bonds, acid-base or coordination interactions, or even covalent bonds). This provides the bases for the building of materials with different sizes, shapes, compositions and morphologies, gathering important possibilities for tuning and controlling the physico-chemical properties of the assembled materials with precision in the nanometer scale, and consequently creating important perspective for the application of these multifunctional materials as cargo systems in many areas of technological interest. This review studies different physico – chemical aspects associated with the assembly of supramolecular materials by the LbL method, paying special attention to the description of these aspects playing a central role in the application of these materials as cargo platforms for encapsulation and release of active compounds.
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      PubDate: 2017-04-24T05:21:54Z
      DOI: 10.1016/j.cis.2017.04.009
  • Synthesis of hydroxyapatite for biomedical applications
    • Authors: Aleksandra Szcześ; Lucyna Hołysz; Emil Chibowski
      Abstract: Publication date: Available online 20 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Aleksandra Szcześ, Lucyna Hołysz, Emil Chibowski
      The current need for long lasting implants and bone substitutes characterized by biocompatibility, bioactivity and mechanical properties, without the immune rejection is a great challenge for scientists. These bone substitute structures should be prepared for individual patients with all details controlled on the micrometer level. Similarly, nontoxic, biocompatible targeted drug delivery systems which allow controlling the rate and time period of the drug delivery and simultaneously eliminating toxic and side effects on the healthy tissues, are of great interest. Extensive attempts have been made to develop a simple, efficient, and green method to form biofunctional scaffolds and implant coatings possessing the above mentioned significant biocompatibility, bioactivity and mechanical strength. Moreover, that could also serve as drug delivery systems. Hydroxyapatite (HA) which is a major mineral component of vertebrate bones and teeth is an excellent material for these purposes. In this literature review the biologically inspired scaffolds, bone substitutes, implants characterized by mechanical strength and biocompatibility, as well the drug delivery systems, based on hydroxyapatite are discussed.
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      PubDate: 2017-04-24T05:21:54Z
      DOI: 10.1016/j.cis.2017.04.007
  • Silica-based systems for oral delivery of drugs, macromolecules and cells
    • Authors: Roudayna Diab; Nadia Canilho; Ileana A. Pavel; Fernanda B. Haffner; Maxime Girardon; Andreea Pasc
      Abstract: Publication date: Available online 20 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Roudayna Diab, Nadia Canilho, Ileana A. Pavel, Fernanda B. Haffner, Maxime Girardon, Andreea Pasc
      According to the US Food and Drug Administration and the European Food Safety Authority, amorphous forms of silica and silicates are generally recognized to be safe as oral delivery ingredients in amounts up to 1500mg per day. Silica is used in the formulation of solid dosage forms, e.g. tablets, as glidant or lubricant. The synthesis of the silica-based materials depends on the payload nature, drug, macromolecule or cell, and on the target release (active or passive). Most of the examples given in the literature, deal with the encapsulation of drugs into mesoporous silica nanoparticles. Silica diatoms appear as an elegant, cheap and promising alternative to synthetic sol-gel-based materials. Concerning the encapsulation of macromolecules and cells, very little was reported in the field of oral delivery, despite the multiples examples already demonstrating the compatibility of the sol-gel method with biological entities and the interest of silica as oral carrier. This review reports the latest advances in this respect and discusses the potential benefits and drawbacks of using silica in oral delivery of drugs, macromolecules or cells.
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      PubDate: 2017-04-24T05:21:54Z
      DOI: 10.1016/j.cis.2017.04.005
  • Advances in structural design of lipid-based nanoparticle carriers for
           delivery of macromolecular drugs, phytochemicals and anti-tumor agents
    • Authors: Angelina Angelova; Vasil M. Garamus; Borislav Angelov; Zhenfen Tian; Yawen Li; Aihua Zou
      Abstract: Publication date: Available online 18 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Angelina Angelova, Vasil M. Garamus, Borislav Angelov, Zhenfen Tian, Yawen Li, Aihua Zou
      The present work highlights recent achievements in development of nanostructured dispersions and biocolloids for drug delivery applications. We emphasize the key role of biological small-angle X-ray scattering (BioSAXS) investigations for the nanomedicine design. A focus is given on controlled encapsulation of small molecular weight phytochemical drugs in lipid-based nanocarriers as well as on encapsulation of macromolecular siRNA, plasmid DNA, peptide and protein pharmaceuticals in nanostructured nanoparticles that may provide efficient intracellular delivery and triggered drug release. Selected examples of utilisation of the BioSAXS method for characterization of various types of liquid crystalline nanoorganizations (liposome, spongosome, cubosome, hexosome, and nanostructured lipid carriers) are discussed in view of the successful encapsulation and protection of phytochemicals and therapeutic biomolecules in the hydrophobic or the hydrophilic compartments of the nanocarriers. We conclude that the structural design of the nanoparticulate carriers is of crucial importance for the therapeutic outcome and the triggered drug release from biocolloids.
      Graphical abstract image

      PubDate: 2017-04-24T05:21:54Z
      DOI: 10.1016/j.cis.2017.04.006
  • Entropy of aqueous surfaces. Application to polymeric Langmuir films
    • Authors: Louise Deschênes; Johannes Lyklema; François St-Germain
      Abstract: Publication date: Available online 9 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Louise Deschênes, Johannes Lyklema, François St-Germain
      Measuring surface (excess) entropies provides a bounty of valuable structural information that is hard to obtain otherwise. In the paper these quantities are defined and procedures of measurements discussed. Mostly they involve measurements at different temperatures. A review is given for interfaces with aqueous solutions in the absence of polymers. This review illustrates how, sometimes unanticipated, pieces of information are obtained, for example with cloud seeding and a possible explanation of the Jones-Ray effect. As a novel extension the procedure is applied to deposited, or Langmuir, monolayers of poly(ethylene oxide)-poly(propylene oxide) block copolymers. It will be shown how the various phase transitions and associated configurations of these polymers can be recognized and monitored.
      Graphical abstract image

      PubDate: 2017-04-10T09:10:51Z
      DOI: 10.1016/j.cis.2017.04.004
  • Electrostatics of Patchy Surfaces
    • Authors: Ram M. Adar; David Andelman; Haim Diamant
      Abstract: Publication date: Available online 7 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Ram M. Adar, David Andelman, Haim Diamant
      In the study of colloidal, biological and electrochemical systems, it is customary to treat surfaces, macromolecules and electrodes as homogeneously charged. This simplified approach is proven successful in most cases, but fails to describe a wide range of heterogeneously charged surfaces commonly used in experiments. For example, recent experiments have revealed a long-range attraction between overall neutral surfaces, locally charged in a mosaic-like structure of positively and negatively charged domains (“patches”). Here we review experimental and theoretical studies addressing the stability of heterogeneously charged surfaces, their ionic strength in solution, and the interaction between two such surfaces. We focus on electrostatics, and highlight the important new physical parameters appearing in the heterogeneous case, such as the largest patch size and inter-surface charge correlations.
      Graphical abstract image

      PubDate: 2017-04-10T09:10:51Z
      DOI: 10.1016/j.cis.2017.04.002
  • Approaches to self-assembly of colloidal monolayers: A guide for
    • Authors: Valeria Lotito; Tomaso Zambelli
      Abstract: Publication date: Available online 7 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Valeria Lotito, Tomaso Zambelli
      Self-assembly of quasi-spherical colloidal particles in two-dimensional (2D) arrangements is essential for a wide range of applications from optoelectronics to surface engineering, from chemical and biological sensing to light harvesting and environmental remediation. Several self-assembly approaches have flourished throughout the years, with specific features in terms of complexity of the implementation, sensitivity to process parameters, characteristics of the final colloidal assembly. Selecting the proper method for a given application amidst the vast literature in this field can be a challenging task. In this review, we present an extensive classification and comparison of the different techniques adopted for 2D self-assembly in order to provide useful guidelines for scientists approaching this field. After an overview of the main applications of 2D colloidal assemblies, we describe the main mechanisms underlying their formation and introduce the mathematical tools commonly used to analyse their final morphology. Subsequently, we examine in detail each class of self-assembly techniques, with an explanation of the physical processes intervening in crystallization and a thorough investigation of the technical peculiarities of the different practical implementations. We point out the specific characteristics of the set-ups and apparatuses developed for self-assembly in terms of complexity, requirements, reproducibility, robustness, sensitivity to process parameters and morphology of the final colloidal pattern. Such an analysis will help the reader to individuate more easily the approach more suitable for a given application and will draw the attention towards the importance of the details of each implementation for the final results.

      PubDate: 2017-04-10T09:10:51Z
      DOI: 10.1016/j.cis.2017.04.003
  • Investigations of the Hofmeister series and other specific ion effects
           using lipid model systems
    • Authors: Epameinondas Leontidis
      Abstract: Publication date: Available online 4 April 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Epameinondas Leontidis
      From the ion point-of-view specific ion effects (SIE) arise as an interplay of ionic size and shape and charge distribution. However in aqueous systems SIE invariably involve water, and at surfaces they involve both interacting surface groups and local fields emanating from the surface. In this review we highlight the fundamental importance of ionic size and hydration on SIE, properties which encompass all types of interacting forces and ion-pairing phenomena and make the Hofmeister or lyotropic series of ions pertinent to a broad range of systems and phenomena. On the other hand ionic hydrophobicity and complexation capacity also determine ionic behavior in a variety of contexts. Over the years we have carried out carefully designed experiments on a few selected soft matter model systems, most involving zwitterionic phospholipids, to assess the importance of fundamental ionic and interfacial properties on ion specific effects. By tuning down direct Coulomb interactions, working with different interfacial geometries, and carefully tuning ion-lipid headgroup interactions it is possible to assess the importance of different parameters contributing to ion specific behavior. We argue that the majority of specific ion effects involving relatively simple soft matter systems can be at least qualitatively understood and demystified.
      Graphical abstract image

      PubDate: 2017-04-10T09:10:51Z
      DOI: 10.1016/j.cis.2017.04.001
  • Micro- and nano bio-based delivery systems for food applications: In vitro
    • Authors: Lívia de Souza Simões; Daniel A. Madalena; Ana C. Pinheiro; José A. Teixeira; António A. Vicente; Óscar L. Ramos
      Abstract: Publication date: Available online 27 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Lívia de Souza Simões, Daniel A. Madalena, Ana C. Pinheiro, José A. Teixeira, António A. Vicente, Óscar L. Ramos
      Micro- and nanoencapsulation is an emerging technology in the food field that potentially allows the improvement of food quality and human health. Bio-based delivery systems of bioactive compounds have a wide variety of morphologies that influence their stability and functional performance. The incorporation of bioactive compounds in food products using micro- and nano-delivery systems may offer extra health benefits, beyond basic nutrition, once their encapsulation may provide protection against undesired environmental conditions (e.g. heat, light and oxygen) along the food chain (including processing and storage), thus improving their bioavailability, while enabling their controlled release and target delivery. This review provides an overview of the bio-based materials currently used for encapsulation of bioactive compounds intended for food applications, as well as the main production techniques employed in the development of micro- and nanosystems. The behavior of such systems and of bioactive compounds entrapped into, throughout in vitro gastrointestinal systems, is also tracked in a critical manner. Comparisons between various in vitro digestion systems (including the main advantages and disadvantages) currently in use, as well as correlations established between the behavior of such systems and studies performed in vivo will be, for the first time, addressed in this review. Finally, examples of bioactive micro- and nanosystems added to food simulants or to real food matrices are provided, together with a revision of the main challenges for their safe commercialization, the regulatory issues involved and the main legislation aspects.
      Graphical abstract image

      PubDate: 2017-04-03T09:00:33Z
      DOI: 10.1016/j.cis.2017.02.010
  • Honorary note to celebrate the 80th birthday of professor Sándor
    • Authors: George Kaptay
      Abstract: Publication date: Available online 22 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): George Kaptay

      PubDate: 2017-03-27T08:56:07Z
      DOI: 10.1016/j.cis.2017.03.005
  • Sol-gel processing of bioactive glass nanoparticles: A review
    • Authors: Kai Zheng; Aldo R. Boccaccini
      Abstract: Publication date: Available online 21 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Kai Zheng, Aldo R. Boccaccini
      Silicate-based bioactive glass nanoparticles (BGN) are gaining increasing attention in various biomedical applications due to their unique properties. Controlled synthesis of BGN is critical to their effective use in biomedical applications since BGN characteristics, such as morphology and composition, determining the properties of BGN, are highly related to the synthesis process. In the last decade, numerous investigations focusing on BGN synthesis have been reported. BGN can mainly be produced through the conventional melt-quench approach or by sol-gel methods. The latter approaches are drawing widespread attention, considering the convenience and versatility they offer to tune the properties of BGN. In this paper, we review the strategies of sol-gel processing of BGN, including those adopting different catalysts for initiating the hydrolysis and condensation of silicate precursors as well as those combining sol-gel chemistry with other techniques. The processes and mechanism of different synthesis approaches are introduced and discussed in detail. Considering the importance of the BGN morphology and composition to their biomedical applications, strategies put forward to control the size, shape, pore structure and composition of BGN are discussed. BGN are particularly interesting biomaterials for bone-related applications, however, they also have potential for other biomedical applications, e.g. in soft tissue regeneration/repair. Therefore, in the last part of this review, recently reported applications of BGN in soft tissue repair and wound healing are presented.
      Graphical abstract image

      PubDate: 2017-03-27T08:56:07Z
      DOI: 10.1016/j.cis.2017.03.008
  • On the cohesion of fluids and their adhesion to solids: Young's equation
           at the atomic scale
    • Authors: J.-C. Fernandez-Toledano; T.D. Blake; P. Lambert; J. De Coninck
      Abstract: Publication date: Available online 21 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): J.-C. Fernandez-Toledano, T.D. Blake, P. Lambert, J. De Coninck
      Using large-scale molecular dynamics simulations, we model a 9.2nm liquid bridge between two solid plates having a regular hexagonal lattice and analyse the forces acting at the various interfaces for a range of liquid-solid interactions. Our objective is to study the mechanical equilibrium of the system, especially that at the three-phase contact line. We confirm previous MD studies that have shown that the internal pressure inside the liquid is given precisely by the Laplace contribution and that the solid exerts a global force at the contact line in agreement with Young's equation, validating it down to the nanometre scale, which we quantify. In addition, we confirm that the force exerted by the liquid on the solid has the expected normal component equal to γ lv sin θ 0, where γ lv is the surface tension of the liquid and θ 0 is the equilibrium contact angle measured on the scale of the meniscus. Recent thermodynamic arguments predict that the tangential force exerted by the liquid on the solid should be equal to the work of adhesion expressed as Wa 0 = γ lv (1+cos θ 0). However, we find that this is true only when any layering of the liquid molecules close to liquid-solid interface is negligible. The force significantly exceeds this value when strong layering is present.
      Graphical abstract image

      PubDate: 2017-03-27T08:56:07Z
      DOI: 10.1016/j.cis.2017.03.006
  • Gas adsorption properties of graphene-based materials
    • Authors: Barbara Szczęśniak; Jerzy Choma; Mietek Jaroniec
      Abstract: Publication date: Available online 20 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Barbara Szczęśniak, Jerzy Choma, Mietek Jaroniec
      Clean energy sources and global warming are among the major challenges of the 21st century. One of the possible actions toward finding alternative energy sources and reducing global warming are storage of H2 and CH4, and capture of CO2 by using highly efficient and low-cost adsorbents. Graphene and graphene-based materials attracted a great attention around the world because of their potential for a variety applications ranging from electronics, gas sensing, energy storage and CO2 capture. Large specific surface area of these materials up to ~3000m2/g and versatile modification make them excellent adsorbents for diverse applications. Here, graphene-based adsorbents are reviewed with special emphasis on their adsorption affinity toward CO2, H2 and CH4. This review shows that graphene derivatives obtained mainly via “chemical exfoliation” of graphite and further modification with polymers and/or metal species can be very effective sorbents for CO2 and other gases and can compete with the currently used carbonaceous or non-carbonaceous adsorbents. The high adsorption capacities of graphene-based materials are mainly determined by their unique nanostructures, high specific surface areas and tailorable surface properties, which make them suitable for storage or capture of various molecules relevant for environmental and energy-related applications.
      Graphical abstract image

      PubDate: 2017-03-27T08:56:07Z
      DOI: 10.1016/j.cis.2017.03.007
  • Acoustic levitation of liquid drops: Dynamics, manipulation and phase
    • Authors: Duyang Zang; Yinkai Yu; Zhen Chen; Xiaoguang Li; Hongjing Wu; Xingguo Geng
      Abstract: Publication date: Available online 18 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Duyang Zang, Yinkai Yu, Zhen Chen, Xiaoguang Li, Hongjing Wu, Xingguo Geng
      The technique of acoustic levitation normally produces a standing wave and the potential well of the sound field can be used to trap small objects. Since no solid surface is involved it has been widely applied for the study of fluid physics, nucleation, bio/chemical processes, and various forms of soft matter. In this article, we survey the works on drop dynamics in acoustic levitation, focus on how the dynamic behavior is related to the rheological properties and discuss the possibility to develop a novel rheometer based on this technique. We review the methods and applications of acoustic levitation for the manipulation of both liquid and solid samples and emphasize the important progress made in the study of phase transitions and bio-chemical analysis. We also highlight the possible open areas for future research.
      Graphical abstract image

      PubDate: 2017-03-20T08:52:09Z
      DOI: 10.1016/j.cis.2017.03.003
  • How to gather useful and valuable information from protein binding
           measurements using Langmuir lipid monolayers
    • Authors: Élodie Boisselier; Éric Demers; Line Cantin; Christian Salesse
      Abstract: Publication date: Available online 18 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Élodie Boisselier, Éric Demers, Line Cantin, Christian Salesse
      This review presents data on the influence of various experimental parameters on the binding of proteins onto Langmuir lipid monolayers. The users of the Langmuir methodology are often unaware of the importance of choosing appropriate experimental conditions to validate the data acquired with this method. The protein Retinitis pigmentosa 2 (RP2) has been used throughout this review to illustrate the influence of these experimental parameters on the data gathered with Langmuir monolayers. The methods detailed in this review include the determination of protein binding parameters from the measurement of adsorption isotherms, infrared spectra of the protein in solution and in monolayers, ellipsometric isotherms and fluorescence micrographs.
      Graphical abstract image

      PubDate: 2017-03-20T08:52:09Z
      DOI: 10.1016/j.cis.2017.03.004
  • Aqueous-phase synthesis of iron oxide nanoparticles and composites for
           cancer diagnosis and therapy
    • Authors: Jingchao Li; Shige Wang; Xiangyang Shi; Mingwu Shen
      Abstract: Publication date: Available online 14 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Jingchao Li, Shige Wang, Xiangyang Shi, Mingwu Shen
      The design and development of multifunctional nanoplatforms for biomedical applications still remains to be challenging. This review reports the recent advances in aqueous-phase synthesis of iron oxide nanoparticles (Fe3O4 NPs) and their composites for magnetic resonance (MR) imaging and photothermal therapy of cancer. Water dispersible and colloidally stable Fe3O4 NPs synthesized via controlled coprecipitation route, hydrothermal route and mild reduction route are introduced. Some of key strategies to improve the r2 relaxivity of Fe3O4 NPs and to enhance their uptake by cancer cells are discussed in detail. These aqueous-phase synthetic methods can also be applied to prepare Fe3O4 NP-based composites for dual-mode molecular imaging applications. More interestingly, aqueous-phase synthesized Fe3O4 NPs are able to be fabricated as multifunctional theranostic agents for multi-mode imaging and photothermal therapy of cancer. This review will provide some meaningful information for the design and development of various Fe3O4 NP-based multifunctional nanoplatforms for cancer diagnosis and therapy.
      Graphical abstract image

      PubDate: 2017-03-15T05:30:21Z
      DOI: 10.1016/j.cis.2017.02.009
  • Effect of ligand on particle size and morphology of nanostructures
           synthesized by thermal decomposition of coordination compounds
    • Authors: Zeinab Fereshteh; Masoud Salavati-Niasari
      Abstract: Publication date: Available online 8 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Zeinab Fereshteh, Masoud Salavati-Niasari
      Thermal decomposition of organometallic and various coordination compounds are known as general method to synthesize a wide range of nanostructures including metals, metal oxides and sulfides. Herein, in order to coordinate metals and prepare suitable precursor - due to the efficient role of precursor on the particle size and morphology of products - appropriate ligands will be introduced.
      Graphical abstract image

      PubDate: 2017-03-15T05:30:21Z
      DOI: 10.1016/j.cis.2017.03.001
  • Saponins — Self-assembly and behavior at aqueous interfaces
    • Authors: Sandra Böttcher; Stephan Drusch
      Abstract: Publication date: Available online 1 March 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Sandra Böttcher, Stephan Drusch
      Saponins are interfacially active ingredients in plants consisting of a hydrophobic aglycone structure with hydrophilic sugar residues. Variations in aglycone structure as well as type and amount of sugar residues occur depending on the botanical origin. Saponins are a heterogeneous and broad class of natural substances and therefore the relationship between molecular structure and interfacial properties is complex and, yet, not completely understood. A wide range of research focused either on structural elucidation of saponins or interfacial properties. This review combines recent knowledge on structural features with interfacial properties and draws conclusions on how saponin structure affects interfacial properties. Fundamental understanding on interfacial configuration of individual saponin molecules at the interface distinctly increased. It was shown that interfacial configuration may differ depending on botanical origin and thus structure of the saponins. The formation of strong viscoelastic interfacial films by some saponins was attributed to hydrogen bonds between neighboring sugar residues. Few studies analyzed the relationship between botanical origin and interfacial rheology and derived main conclusions on important structural features. Saponins with a triterpenoid structure are most likely to form viscoelastic films, which result in stable foams and emulsions. The aglycone subtype may also affect interfacial properties as triterpenoid saponins of oleanane type formed most stable interfacial networks. But for more reliable conclusions more saponins from other aglycone subtypes (dammarane, ursolic) have to be analyzed. To-date only extracts from Quillaja saponaria Molina are approved for food products and many studies focused on these extracts. From experiments on interfacial rheology a reasonable model for supramolecular structure of Quillaja saponins was developed. It was further shown that Quillaja saponins may form micelles loaded with hydrophobic substances, nano-emulsions and stable foams. In combination proteins an increase in interfacial film stability may be observed but also negative phenomena like aggregation of oil droplets in emulsions may occur.
      Graphical abstract image

      PubDate: 2017-03-15T05:30:21Z
      DOI: 10.1016/j.cis.2017.02.008
  • Recent advances in biomedical applications of fluorescent gold
    • Authors: Youkun Zheng; Lanmei Lai; Weiwei Liu; Hui Jiang; Xuemei Wang
      Abstract: Publication date: Available online 16 February 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Youkun Zheng, Lanmei Lai, Weiwei Liu, Hui Jiang, Xuemei Wang
      Fluorescent gold nanoclusters (AuNCs) are emerging as novel fluorescent materials and have attracted more and more attention in the field of biolabeling, biosensing, bioimaging and targeted cancer treatment because of their unusual physicochemical properties, such as long fluorescence lifetime, ultrasmall size, large Stokes shift, strong photoluminescence, as well as excellent biocompatibility and photostability. Recently, significant efforts have been committed to the preparation, functionalization and biomedical application studies of fluorescent AuNCs. In this review, we have summarized the strategies for preparation and surface functionalization of fluorescent AuNCs in the past several years, and highlighted recent advances in the biomedical applications of the relevant fluorescent AuNCs. Based on these observations, we also give a discussion on the current problems and future developments of the fluorescent AuNCs for biomedical applications.
      Graphical abstract image

      PubDate: 2017-02-23T05:24:23Z
      DOI: 10.1016/j.cis.2017.02.005
  • Capillary dynamics driven by molecular self-layering
    • Authors: Pingkeng Wu; Alex Nikolov; Darsh Wasan
      Abstract: Publication date: Available online 10 February 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Pingkeng Wu, Alex Nikolov, Darsh Wasan
      Capillary dynamics is a ubiquitous everyday phenomenon. It has practical applications in diverse fields, including ink-jet printing, lab-on-a-chip, biotechnology, and coating. Understanding capillary dynamics requires essential knowledge on the molecular level of how fluid molecules interact with a solid substrate (the wall). Recent studies conducted with the surface force apparatus (SFA), atomic force microscope (AFM), and statistical mechanics simulation revealed that molecules/nanoparticles confined into the film/wall surfaces tend to self-layer into 2D layer/s and even 2D in-layer with increased confinement and fluid volume fraction. Here, the capillary rise dynamics of simple molecular fluids in cylindrical capillary is explained by the molecular self-layering model. The proposed model considers the role of the molecular shape on self-layering and its effect on the molecularly thin film viscosity in regards to the advancing (dynamic) contact angle. The model was tested to explain the capillary rise dynamics of fluids of spherical, cylindrical, and disk shape molecules in borosilicate glass capillaries. The good agreement between the capillary rise data and SFA data from the literature for simple fluid self-layering shows the validity of the present model. The present model provides new insights into the design of many applications where dynamic wetting is important because it reveals the significant impact of molecular self-layering close to the wall on dynamic wetting.
      Graphical abstract image

      PubDate: 2017-02-16T03:13:47Z
      DOI: 10.1016/j.cis.2017.02.004
  • Delivery systems for antimicrobial peptides
    • Authors: Randi Nordström; Martin Malmsten
      Abstract: Publication date: Available online 25 January 2017
      Source:Advances in Colloid and Interface Science
      Author(s): Randi Nordström, Martin Malmsten
      Due to rapidly increasing resistance development against conventional antibiotics, finding novel approaches for the treatment of infections has emerged as a key health issue. Antimicrobial peptides (AMPs) have attracted interest in this context, and there is by now a considerable literature on the identification such peptides, as well as on their optimization to reach potent antimicrobial and anti-inflammatory effects at simultaneously low toxicity against human cells. In comparison, delivery systems for antimicrobial peptides have attracted considerably less interest. However, such delivery systems are likely to play a key role in the development of potent and safe AMP-based therapeutics, e.g., through reducing chemical or biological degradation of AMPs either in the formulation or after administration, by reducing adverse side-effects, by controlling AMP release rate, by promoting biofilm penetration, or through achieving co-localization with intracellular pathogens. Here, an overview is provided of the current understanding of delivery systems for antimicrobial peptides, with special focus on AMP-carrier interactions, as well as consequences of these interactions for antimicrobial and related biological effects of AMP-containing formulations.
      Graphical abstract image

      PubDate: 2017-01-28T10:41:44Z
      DOI: 10.1016/j.cis.2017.01.005
  • Valorisation of post-sorption materials: Opportunities, strategies, and
    • Authors: D. Harikishore Kumar Reddy; K. Vijayaraghavan; Jeong Ae Kim; Yeoung-Sang Yun
      Abstract: Publication date: Available online 12 December 2016
      Source:Advances in Colloid and Interface Science
      Author(s): D. Harikishore Kumar Reddy, K. Vijayaraghavan, Jeong Ae Kim, Yeoung-Sang Yun
      Adsorption is a facile, economic, eco-friendly and low-energy requiring technology that aims to separate diverse compounds (ions and molecules) from one phase to another phase using a wide variety of adsorbent materials. To date, this technology has been used most often for removal/recovery of pollutants from aqueous solutions; however, emerging post-sorption technologies are now enabling the manufacture of value-added key adsorption products that can subsequently be used for (i) fertilizers, (ii) catalysis, (iii) carbonaceous metal nanoparticle synthesis, (iv) feed additives, and (v) biologically active compounds. These new strategies ensure the sustainable valorisation of post-sorption materials as an economically viable alternative to the engineering of other green chemical products because of the ecological affability, biocompatibility, and widespread accessibility of post-sorption materials. Fertilizers and feed additives manufactured using sorption technology contain elements such as N, P, Cu, Mn, and Zn, which improve soil fertility and provide essential nutrients to animals and humans. This green and effective approach to managing post-sorption materials is an important step in reaching the global goals of sustainability and healthy human nutrition. Post-sorbents have also been utilized for the harvesting of metal nanoparticles via modern catalytic pyrolysis techniques. The resulting materials exhibited a high surface area (>1000m2/g) and are further used as catalysts and adsorbents. Together with the above possibilities, energy production from post-sorbents is under exploration. Many of the vital 3E (energy, environment, and economy) problems can be addressed using post-sorption materials. In this review, we summarize a new generation of applications of post-adsorbents as value-added green chemical products. At the end of each section, scientific challenges, further opportunities, and issues related to toxicity are discussed. We believe this critical evaluation not only delivers essential contextual information to researchers in the field but also stimulates new ideas and applications to further advance post-sorbent applications.
      Graphical abstract image

      PubDate: 2016-12-14T11:04:51Z
      DOI: 10.1016/j.cis.2016.12.002
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