Subjects -> CHEMISTRY (Total: 928 journals)
    - ANALYTICAL CHEMISTRY (59 journals)
    - CHEMISTRY (661 journals)
    - CRYSTALLOGRAPHY (23 journals)
    - ELECTROCHEMISTRY (28 journals)
    - INORGANIC CHEMISTRY (45 journals)
    - ORGANIC CHEMISTRY (47 journals)
    - PHYSICAL CHEMISTRY (65 journals)

CHEMISTRY (661 journals)            First | 1 2 3 4 | Last

Showing 201 - 400 of 735 Journals sorted alphabetically
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 11)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 13)
Computational Chemistry     Open Access   (Followers: 3)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 12)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 6)
Corrosion Communications     Open Access  
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 17)
Croatica Chemica Acta     Open Access  
CrystEngComm     Hybrid Journal   (Followers: 10)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 8)
Current Opinion in Green and Sustainable Chemistry     Hybrid Journal  
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 8)
Current Protocols in Nucleic Acid Chemistry     Hybrid Journal  
Current Protocols in Protein Science     Hybrid Journal   (Followers: 1)
Current Research in Chemical Biology     Open Access  
Current Research in Chemistry     Open Access   (Followers: 7)
Current Research in Green and Sustainable Chemistry     Open Access  
Current Science     Open Access   (Followers: 116)
Current Topics in Medicinal Chemistry     Hybrid Journal   (Followers: 7)
Dalton Transactions     Hybrid Journal   (Followers: 23)
Detection     Open Access   (Followers: 3)
Diamond and Related Materials     Hybrid Journal   (Followers: 10)
Doklady Chemistry     Hybrid Journal  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 4)
Ecological Chemistry and Engineering S     Open Access   (Followers: 2)
Educação Química en Punto de Vista     Open Access  
Educación Química     Open Access   (Followers: 1)
Education for Chemical Engineers     Hybrid Journal   (Followers: 5)
EDUSAINS     Open Access  
EJNMMI Radiopharmacy and Chemistry     Open Access  
Elements     Full-text available via subscription   (Followers: 3)
Energetic Materials Frontiers     Open Access  
EnergyChem     Hybrid Journal   (Followers: 1)
Environmental Chemistry     Hybrid Journal   (Followers: 9)
Environmental Chemistry and Ecotoxicology     Open Access  
Environmental Chemistry Letters     Hybrid Journal   (Followers: 4)
Environmental Science & Technology Letters     Hybrid Journal   (Followers: 7)
Environmental Science : Nano     Hybrid Journal   (Followers: 2)
Environmental Toxicology & Chemistry     Hybrid Journal   (Followers: 22)
Enzyme Research     Open Access   (Followers: 4)
Eurasian Chemico-Technological Journal     Open Access  
European Journal of Chemistry     Open Access   (Followers: 25)
European Journal of Histochemistry     Open Access   (Followers: 4)
European Journal of Medicinal Chemistry     Hybrid Journal   (Followers: 21)
European Journal of Medicinal Chemistry Reports     Open Access  
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 4)
Faraday Discussions     Hybrid Journal   (Followers: 3)
Fine Chemical Technologies / Тонкие химические технологии     Open Access  
FirePhysChem     Open Access  
Fitoterapia     Hybrid Journal   (Followers: 4)
FlatChem : Chemistry of Flat Materials     Hybrid Journal  
Fluid Phase Equilibria     Hybrid Journal   (Followers: 4)
Folia Histochemica et Cytobiologica     Open Access  
Folia Microbiologica     Hybrid Journal   (Followers: 2)
Food Chemistry : Molecular Sciences     Open Access   (Followers: 1)
Food Digestion     Hybrid Journal   (Followers: 5)
Food Security     Open Access   (Followers: 11)
Food Structure     Hybrid Journal   (Followers: 3)
Forensic Chemistry     Hybrid Journal   (Followers: 9)
Foundations of Chemistry     Hybrid Journal   (Followers: 4)
Frontiers in Chemistry     Open Access   (Followers: 4)
Frontiers in Soil Science     Open Access  
Frontiers of Chemical Science and Engineering     Hybrid Journal   (Followers: 5)
Fullerenes, Nanotubes and Carbon Nanostructures     Hybrid Journal   (Followers: 9)
Future Medicinal Chemistry     Full-text available via subscription   (Followers: 5)
Gases     Open Access   (Followers: 1)
Gels     Open Access  
Geochemical Transactions     Open Access   (Followers: 2)
Geofluids     Open Access   (Followers: 5)
Giant     Open Access  
Graphene     Open Access   (Followers: 7)
Graphene     Full-text available via subscription   (Followers: 3)
Graphene Technology     Hybrid Journal  
Green Analytical Chemistry     Open Access   (Followers: 3)
Green and Sustainable Chemistry     Open Access   (Followers: 4)
Green Chemistry Letters and Reviews     Open Access   (Followers: 6)
Green Synthesis and Catalysis     Open Access  
GSTF Journal of Chemical Sciences (JChem)     Open Access  
Helvetica Chimica Acta     Hybrid Journal   (Followers: 32)
Heritage Science     Open Access   (Followers: 5)
Heteroatom Chemistry     Open Access   (Followers: 3)
High Energy Chemistry     Hybrid Journal  
Indian Chemical Engineer     Hybrid Journal   (Followers: 4)
Indian Journal of Chemical Technology (IJCT)     Open Access   (Followers: 9)
Indian Journal of Chemistry - Section B (IJC-B)     Open Access   (Followers: 12)
Indian Journal of Natural Products and Resources (IJNPR)     Open Access   (Followers: 1)
Indonesian Journal of Chemical Science     Open Access  
Indonesian Journal of Chemistry     Open Access   (Followers: 1)
Indonesian Journal of Pure and Applied Chemistry     Partially Free  
Industrial & Engineering Chemistry     Full-text available via subscription   (Followers: 10)
InfoMat     Open Access  
Inorganic Chemistry     Hybrid Journal   (Followers: 31)
Inorganic Chemistry Communications     Hybrid Journal   (Followers: 13)
Inorganic Materials     Hybrid Journal   (Followers: 5)
Inorganica Chimica Acta     Hybrid Journal   (Followers: 6)
Instrumentation Science & Technology     Hybrid Journal   (Followers: 7)
International Archives of Science and Technology     Open Access  
International Journal for Ion Mobility Spectrometry     Hybrid Journal   (Followers: 1)
International Journal of Adhesion and Adhesives     Hybrid Journal   (Followers: 18)
International Journal of Advanced Chemistry     Open Access   (Followers: 1)
International Journal of Agrochemistry     Full-text available via subscription  
International Journal of Analytical Mass Spectrometry and Chromatography     Open Access   (Followers: 8)
International Journal of Biological and Chemical Sciences     Open Access   (Followers: 4)
International Journal of Biological Chemistry     Open Access   (Followers: 2)
International Journal of Biological, Physical and Chemical Studies     Open Access  
International Journal of Chemical Kinetics     Hybrid Journal   (Followers: 7)
International Journal of Chemical Technology     Open Access   (Followers: 7)
International Journal of Chemistry     Open Access   (Followers: 10)
International Journal of Chemistry and Technology     Open Access   (Followers: 1)
International Journal of Chemoinformatics and Chemical Engineering     Full-text available via subscription   (Followers: 2)
International Journal of Corrosion     Open Access   (Followers: 10)
International Journal of Energetic Materials     Full-text available via subscription  
International Journal of Environmental Chemistry     Full-text available via subscription  
International Journal of Materials and Chemistry     Open Access   (Followers: 7)
International Journal of Medicinal Chemistry     Open Access   (Followers: 4)
International Journal of Minerals, Metallurgy, and Materials     Hybrid Journal   (Followers: 8)
International Journal of Molecular Sciences     Open Access   (Followers: 2)
International Journal of Nano Dimension     Open Access   (Followers: 2)
International Journal of Photoenergy     Open Access   (Followers: 3)
International Journal of Spray and Combustion Dynamics     Full-text available via subscription   (Followers: 15)
International Journal of Thermodynamics and Chemical Kinetics     Full-text available via subscription   (Followers: 2)
International Journal of Tryptophan Research     Open Access  
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 8)
International Research Journal of Pure and Applied Chemistry     Open Access  
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)     Open Access   (Followers: 1)
Iranian Polymer Journal     Hybrid Journal   (Followers: 3)
Iraqi Journal of Pharmacy     Open Access  
Israel Journal of Chemistry     Full-text available via subscription   (Followers: 4)
IUCrData     Open Access   (Followers: 1)
JACS Au     Open Access  
JBIC Journal of Biological Inorganic Chemistry     Hybrid Journal   (Followers: 2)
JCIS Open     Open Access   (Followers: 1)
JOT Journal für Oberflächentechnik     Hybrid Journal   (Followers: 1)
JOT-International Surface Technology     Hybrid Journal   (Followers: 1)
Journal of Adhesion     Hybrid Journal   (Followers: 7)
Journal of Adhesion Science and Technology     Hybrid Journal   (Followers: 10)
Journal of Advances in Chemistry     Open Access   (Followers: 4)
Journal of Agricultural and Food Chemistry     Hybrid Journal   (Followers: 9)
Journal of Agricultural Chemistry and Environment     Open Access   (Followers: 3)
Journal of Al-Qadisiyah for Pure Science     Open Access  
Journal of Amino Acids     Open Access   (Followers: 1)
Journal of Analytical Methods in Chemistry     Open Access   (Followers: 1)
Journal of Analytical Sciences, Methods and Instrumentation     Open Access   (Followers: 4)
Journal of AOAC International     Hybrid Journal   (Followers: 4)
Journal of Applied Chemistry     Open Access   (Followers: 6)
Journal of Applied Solution Chemistry and Modeling     Hybrid Journal   (Followers: 1)
Journal of Applied Spectroscopy     Hybrid Journal   (Followers: 9)
Journal of Biomaterials and Nanobiotechnology     Open Access   (Followers: 6)
Journal of Boron     Open Access  
Journal of Carbohydrate Chemistry     Hybrid Journal   (Followers: 4)
Journal of Catalysis     Hybrid Journal   (Followers: 11)
Journal of Catalyst & Catalysis     Full-text available via subscription   (Followers: 2)
Journal of Chemical & Engineering Data     Hybrid Journal   (Followers: 10)
Journal of Chemical Education     Hybrid Journal   (Followers: 20)
Journal of Chemical Information and Modeling     Hybrid Journal   (Followers: 18)
Journal of Chemical Research     Open Access   (Followers: 6)
Journal of Chemical Reviews     Open Access  
Journal of Chemical Sciences     Partially Free   (Followers: 22)
Journal of Chemical Theory and Computation     Hybrid Journal   (Followers: 21)
Journal of Chemical Thermodynamics     Hybrid Journal   (Followers: 7)
Journal of Cheminformatics     Open Access   (Followers: 7)
Journal of Chemistry     Open Access   (Followers: 6)
Journal of Chemistry, Environmental Sciences and its Applications     Open Access   (Followers: 2)
Journal of Chemometrics     Hybrid Journal   (Followers: 9)
Journal of Chromatography A     Hybrid Journal   (Followers: 63)
Journal of Chromatography Open     Open Access   (Followers: 1)
Journal of Coating Science and Technology     Hybrid Journal  
Journal of Colloid and Interface Science     Hybrid Journal   (Followers: 17)
Journal of Computational Chemistry     Hybrid Journal   (Followers: 21)
Journal of Coordination Chemistry     Hybrid Journal   (Followers: 5)
Journal of Dispersion Science and Technology     Hybrid Journal  
Journal of Education and Science     Open Access   (Followers: 2)
Journal of Encapsulation and Adsorption Sciences     Open Access   (Followers: 1)
Journal of Energy Chemistry     Full-text available via subscription   (Followers: 3)
Journal of Flow Chemistry     Full-text available via subscription   (Followers: 2)
Journal of Fluorescence     Hybrid Journal   (Followers: 3)
Journal of Fluorine Chemistry     Hybrid Journal   (Followers: 7)
Journal of Fuel Chemistry and Technology     Full-text available via subscription   (Followers: 1)
Journal of Great Lakes Research     Hybrid Journal   (Followers: 5)
Journal of Heterocyclic Chemistry     Hybrid Journal   (Followers: 10)
Journal of Immunoassay and Immunochemistry     Hybrid Journal   (Followers: 9)
Journal of Inclusion Phenomena and Macrocyclic Chemistry     Hybrid Journal   (Followers: 1)
Journal of Inorganic Biochemistry     Hybrid Journal   (Followers: 4)
Journal of Ionic Liquids     Open Access  
Journal of Labelled Compounds and Radiopharmaceuticals     Hybrid Journal   (Followers: 4)
Journal of Macromolecular Science, Part A: Pure and Applied Chemistry     Hybrid Journal   (Followers: 1)
Journal of Mass Spectrometry     Hybrid Journal   (Followers: 41)
Journal of Materials Chemistry A : Materials for Energy and Sustainability     Hybrid Journal   (Followers: 40)
Journal of Materials Chemistry B : Materials for Biology and Medicine     Hybrid Journal   (Followers: 11)
Journal of Materials Chemistry C : Materials for Optical, Magnetic and Electronic Devices     Hybrid Journal   (Followers: 17)
Journal of Materials Physics and Chemistry     Open Access   (Followers: 7)
Journal of Materials Research     Full-text available via subscription   (Followers: 13)
Journal of Materials Science and Chemical Engineering     Open Access   (Followers: 1)
Journal of Mathematical Chemistry     Hybrid Journal   (Followers: 5)
Journal of Medicinal Chemistry     Hybrid Journal   (Followers: 135)
Journal of Membrane Science     Hybrid Journal   (Followers: 22)
Journal of Metastable and Nanocrystalline Materials     Full-text available via subscription   (Followers: 1)
Journal of Modern Chemistry & Chemical Technology     Open Access   (Followers: 2)
Journal of Molecular Graphics and Modelling     Hybrid Journal   (Followers: 1)

  First | 1 2 3 4 | Last

Similar Journals
Journal Cover
International Journal of Nano Dimension
Number of Followers: 2  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2008-8868 - ISSN (Online) 2228-5059
Published by Islamic Azad University Homepage  [18 journals]
  • Microwave-assisted greener synthesis of Silver nanoparticles using Entada
           rheedii leaf extract and investigation of its anticancer and antimicrobial
           properties

    • Abstract: In the current investigation phytochemically mediated, easy, efficient, and eco-friendly green synthesis of silver nanoparticles (AgNPs) was carried out using Entada rheedii leaf extract as a reducing and capping agent in a microwave-assisted synthetic pathway. UV-Visible spectroscopy, IR spectroscopy, scanning electron microscope (SEM), and transmission electron microscopic (TEM) techniques were used to confirm the formation of silver nanoparticles. The functional groups present in the capping agent were identified by FTIR analysis.  SEM and TEM analysis studied the surface morphology of the biosynthesized AgNPs. AgNPs also showed significant antibacterial effects against four different bacterial pathogens Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus, and Vibrio cholera. Additionally, the prepared AgNPs exhibited solid anticancer activity against Dalton's lymphoma ascites (DLA) cells.
       
  • Thermoelectric properties of zigzag single-walled Carbon nanotubes and
           zigzag single-walled Boron Nitride nanotubes (9, 0)

    • Abstract: In this paper, the thermoelectric properties of zigzag single-walled carbon nanotubes (SWCNT) and zigzag single-walled boron nitride nanotubes (SWBNNT) are investigated. For this purpose, the chirality is considered as (9, 0). The characteristics are computed at three arbitrary temperatures of 200K, 300K, and 500K. Results show the Seebeck coefficient of zigzag SWCNT increases by increasing the temperature, while decreases for the zigzag SWBNNT. The peak of the Seebeck coefficient of the zigzag SWCNT at the temperatures of 200K, 300K, and 500K are , , and , respectively. The associated values of SWBNNT are, , and , respectively.Besides, it is observed that at the temperature of 200K, the Seebeck coefficient zigzag SWBNNT is about 88 times the value of zigzag SWCNT. Moreover, due to the Seebeck coefficient sign type in the Fermi energy range, both of the considered nanostructures are semiconductors and n-type. It is depicted that the electrical conductivity and total thermal conductance of SWCNT are larger than SWBNNT. Efficiency is an important parameter to characterize the thermoelectric properties of nanomaterials. Results show the figure-of-merit (ZT) value of SWBNNT is much better than that of SWCNT. Due to the contribution of phonons, the zigzag SWBNNT has larger Seebeck coefficient. The studies show that the maximum value of ZT of the zigzag SWBNNT at the temperatures of 200K, 300K and, 500K are larger than 0.0207, 0.0342 and, 0.0718, respectively. The results of this study can be useful in the design of nanoelectronic, and cooling systems.
       
  • Sheet-like Iron Hydroxyl Phosphate as an effective flame retardant and
           smoke suppressant for Polyacrylonitrile

    • Abstract: A novel, one-step, facile and low-cost strategy was successfully designed to synthesize iron hydroxyl phosphate (IP) nanosheets via solvothermal method using iron (II) sulfate heptahydrate, ethylene glycol, and phosphoric acid. Then, for the first time, the flame retardant and smoke suppressant properties of the IP were studied. The synthesized IP nanosheets were added into the polyacrylonitrile (PAN) matrix, by a solvent blending method, to prepare PAN/IP nanocomposite. The structure and morphology of the IP nanosheets were carefully characterized by X-ray diffraction (XRD), X-ray photoelectron spectrum (XPS), Fourier-transform infrared (FT-IR) spectroscopy, Raman spectroscopy, field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). In addition, the thermal stability, flame retardancy and fire hazard of the PAN/IP nanocomposite were investigated by thermogravimetric analysis (TGA), cone calorimetry, and UL-94 vertical burning test. The PAN/IP nanocomposite exhibited significantly higher smoke suppression and flame retardancy capability as well as less fire hazards than those of the pure PAN. Moreover, incorporation of the IP into the PAN matrix increased the residual char. These improvements were attributed to the ability of the IP to contribute in formation of effective barrier char layer on the PAN, sheet-like morphology of the IP as well as catalytic activity of the IP in carbon monoxide (CO) oxidation.
       
  • Preparation, the physicochemical assessment, and the cytotoxicity of
           Cisplatin-loaded mesoporous Silica nanoparticles against head and neck
           squamous cell carcinoma cell line

    • Abstract: The aim of this study was to prepare, the physicochemical assessment and the cytotoxicity testing of cisplatin-loaded mesoporous silica nanoparticles against head and neck squamous cell carcinoma cell line (HNSCC). Cisplatin-loaded mesoporous silica nanoparticles were prepared through the precipitation method. The prepared nanoparticles were evaluated by conventional methods in terms of physicochemical properties. The cytotoxic effect of the nanoparticles and the free cisplatin were assessed on the head and neck squamous carcinoma cell line. The results showed that the prepared nanoparticles with nanometer size and the negative surface charge belonged to the MCM-41 silica family. TEM images established the mesoporous construction and the rod-shaped morphology of the produced nanoparticles. Based on Brunauer-Emmett-Teller (BET) analysis, the specific surface area, pore volume, and pore diameter decreased compared to free mesoporous silica because of drug filling into the mesoporous pores. The nanoparticles showed a two stage release pattern that continued slowly until the 35th day. Mesoporous silica nanoparticles displayed no significant cytotoxic effect on HNSCC. Cisplatin displayed a cytotoxic effect with IC50 of 82.01 μM and 33.67 μM in 24 h and 48 h incubation times, respectively. However, cisplatin-loaded mesoporous silica nanoparticles displayed a cytotoxic effect with IC50 of 26.17 μM and 13.28 μM in 24 and 48 h incubation times, respectively. The results can highlight the capability of cisplatin-loaded mesoporous silica nanoparticles to be applied in the treatment of oral cancerous cells.
       
  • Surface, structural and optical investigation on Poly Vinyl Alcohol
           (PVA)/Bi2WO6 nanocomposite films

    • Abstract: Bismuth tungstate (Bi2WO6) emerged as one of the most capable chromogenic compounds among transition metal oxide having wide opto-electronic applications. It is an n-type semiconducting material having bandgap around ~2.7eV. Conversely, NanoComposite (NC) materials have been investigated in order to tailor the properties polymers and also to widen the applications. In this context Poly (vinyl alcohol)/ Bismuth tungstate (PVA/Bi2WO3) NC films were prepared with various weight ratio of Bi2WO6 content viz.0, 0.1, 0.2 0.4, and 0.8 wt%. The solution combustion method was employed to prepare Bi2WO6 nanoparticles (NPs). Subsequently, synergistic effect of polymer matrix and Bi2WO6 NPs is characterized and analysed to estimate the enhanced properties. The surface morphology of the NC’s films was explored by Scanning Electron Microscopy (SEM). Elemental analysis is carried out using EDAX. The formation of polymer NC and its microstructural properties were investigated by X-ray diffraction technique and it is revealed that there is formation of orthorhombic phase for Bi2WO6 NPs with an average size of 35nm. Interaction of NP and PVA is studied using FT-IR spectrometer. The optical constants were evaluated by UV-visible spectrometer and it was found that NC films bandgap energy varied from 5.4 eV to 2.85eV for direct and from 4.57eV to 2.38eV for indirect bandgap. It is anticipated that these unique organic–inorganic NC materials are the emerging functional materials in the field of opto-electronics.
       
  • Low-power min/max architecture in 32nm CNTFET technology for fuzzy
           applications based on a novel comparator

    • Abstract: In this paper, the design of a novel low-power Min/Max circuit using Carbon Nanotube Field-Effect Transistor (CNTFET) technology has been discussed. By employing a new structure for the implementation of digital comparator, a high performance configuration has been obtained which consumes small area on chip due to the low transistor count used for its implementation. Because the comparator is capable of comparing 4-bit words, the designed circuitry can also be expanded to operate as a Winner-Takes-All (WTA) or Loser-Takes-All (LTA) system. The circuit is first simulated in a Complementary Metal-Oxide-Semiconductor (CMOS) process to demonstrate its correct performance and then, the simulations have been performed for the CNTFET technology to indicate that the design procedure is independent of the employed technology. In order to show the advantages of the proposed circuitry in a better manner, the state-of-the-art similar works have been redesignated and simulated along with our work. Based on the simulation results for CNTFET 32nm standard process, the proposed comparator consumes 8.3µW from 0.9V power supply, while its total transistor count is 66.
       
  • Nano γ-Al2O3: Enhancement of catalytic performance in the synthesis
           of Bis (Indolyl) Methanes

    • Abstract: The synthesis of bis(indolyl)methane derivatives in the reaction between indoles and aldehydes was carried out in a short reaction time (10-20 minutes) with good yield (78-96%) by using 1 mol% of nanoγ-Al2O3in H2O as a green solvent at room temperature. Moreover, we usednanoγ-Al2O3 as an effortlessly accessible, less costly, and possible under eco-friendly conditions catalyst in this method. Consequently, this method presented significant benefits containing a low amount of the catalyst, purification of target molecules by non-chromatographic process, use of recyclability of the catalyst, simply efficient, green, and suitable for the synthesis of a broad range of bis(indolyl)methane derivatives. This method achieves to have a numerous scope concerning the difference in the aldehydes and indoles. Moreover, water was the only by-product, which added to its attractiveness. Bis(indolyl)methane derivatives have a varied range of bioactive metabolites of native and marine sources. The hydrothermal and chemical stability of γ-Al2O3 is a severe point for catalytic applications. The melting point, FT-IR, and 1H NMR spectra of the selected product showed that these products were synthesized successfully.  
       
  • Green synthesis, characterization and antimicrobial activity of nanosized
           Cuprous Oxide fabricated using aqueous extracts of Allium Cepa and
           Raphanus Sativus

    • Abstract: Green synthesis of metal nanoparticles (MNPs) is attracting the attention of chemists as it is cost effective and environment benign technique.  Hence it is preferred to methods which use toxic reagents in the synthesis of MNPs. In. In this study, copper oxide nanoparticles (Cu2ONPs) were synthesized using Allium cepa (AC) and Raphanus sativus (RS) aqueous extracts.  The Cu2ONPs were investigated using UV–visible spectroscopy (UV–Vis), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDX). Peak positions (2θ values) in the XRD pattern of Cu2O NPs revealed (1 1 0), (1 1 1), (2 0 0), (2 2 0), (3 1 1) and (2 2 2) planes of face-centered cubic (FCC) crystalline structure. The SEM images indicate spherical shape of Cu2ONPs having low particle size (12-30 nm). The present nanoparticles demonstrated substantial antimicrobial activity against harmful bacteria viz. S. aureus, and E. coli and also against C. albicans fungal species. The current study reveals efficacy of Allium cepa (Onion) and Raphanus sativus (Radish) aqueous extracts as reducing and capping agent for the green synthesis of Cu2O NPs. The copper nanoparticles derived from Raphanus sativus (RS) showed justifiably low grain size and comparable to recently studied copper nanoparticles prepared using plant extracts.
       
  • Phytofabrication of Silver nanoparticles using Abrus precatorius L Seed
           extract and their antioxidant and antibacterial activity

    • Abstract: The present investigation evaluates the potential of aqueous seed extract of Abrus precatorius L. for the biosynthesis of silver nanoparticles (AgNPs). The structure of AgNPs was authenticated by the changes in colour as well as the UV-vis spectroscopy, which showed an absorbance maxima peak at 441 nm. The scanning electron microscope (SEM) investigation proved the particle shape as well as the X-ray diffraction (XRD) that validated the crystalline character of AgNPs. The AFM study also corroborated the surface morphology of manufactured AgNPs. Fourier Transform Infrared (FTIR) approved the presence of alcoholic, and the phenolic groups co-operated an imperative reduction role in the synthesis method. In vitro, the antioxidant action of both A. precatorius seed extract and AgNPs were scrutinized by DPPH assay. It illustrates the antibacterial activity against the gram negative bacteria Salmonella paratyphi as well as the Escherichia coli. Compared to other NPs, the AgNPs synthesized in this study were smaller in size that exhibited a higher level of antioxidant and antibacterial activity. From the consequences, it is proposed that green synthesized AgNPs could be employed successfully in future biomedical applications.
       
  • Improving the fluid loss and rheological characteristics of Oil-based
           drilling fluid by using Copper Oxide nanoparticles

    • Abstract: A successful drilling operation depends strongly on a useful drilling fluid system. Using nanoparticles (NP)s to formulate intelligent drilling fluids gives them a wide range of optimal properties under different operating conditions and resolves any operational problems. In this study, in order to provide an effective solution for improving the rheological and high pressure/high temperature (HPHT) filtration properties of the oil-based drilling fluid (OBDF), copper oxide (CuO) NPs were synthesized with dandelion morphology. CuO dandelions were characterized by using XRD, FTIR, SEM, and zeta potential measurements. A long time stabilized nanofluid (NF) was prepared and evaluated. The OBDF samples consisting of various amounts of NF ranging from 1 to 11% (V/V) were prepared. Then, the fluid loss and rheological properties of OBDF were examined. The results showed that the OBDF containing 7% (V/V) NF was appropriate to improve the rheological properties such as yield point (YP), apparent viscosity (AV), and gel strength (GS). In addition, the minimum HPHT filtration value of 2 ml was acquired for the drilling fluid containing 9% (V/V) NF. In conclusion, CuO NPs demonstrated a positive effect on the performance of the OBDF system.
       
  • Antibacterial and morphological studies of plant-mediated synthesized CuO
           nanoparticles using Azadirachta indica (neem) leaf extract

    • Abstract: This paper deals with the synthesis of copper oxide (CuO) nanoparticles by the plant-mediated method using copper acetate monohydrate and neem extract. The formation of nanoparticles was confirmed by UV-Visible spectral studies. P-XRD studies revealed that the average particle size of synthesized nanoparticles was 11.30 nm which was in good agreement with TEM results. Morphology of synthesized nanoparticles was determined by SEM which revealed that CuO nanoparticles were spherical and some were agglomerated in nature. The EDX spectrum of nanoparticles exhibited three signals one signal at 0.9 keV and other signals at ~8 keV which is due to Cu and another signal of oxygen appeared at 0.5 keV this indicated that nanoparticles of copper have been formed as copper oxide. The synthesized nanoparticles were screened for their antibacterial activity in vitro against gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa by adopting the disk diffusion method. The results of antibacterial studies exhibited that CuO NPs were potential antibacterial agents.
       
  • Hirshfeld surface analysis of solid-state synthesized NiFe2O4
           nanocomposite and application of it for photocatalytic degradation of
           Water pollutant dye

    • Abstract: The present work reports the Hirshfeld surface analysis and photocatalytic performance of NiFe2O4 nanomaterial. Hirshfeld surface analysis was performed to understand the interaction properties of the NiFe2O4 compound. The active sites including π-π interactions are studied by the analysis. The Hirshfeld data showed that the two wings in the O…O and O…Ni diagrams are created by short contacts of O…O, and O…Ni which causes O―O…π and O―Ni…. π interactions. The interactions cover the surfaces with values of 8.8% and 9.4%, respectively. Nanostructured NiFe2O4 powder was used as a photocatalyst to degrade Malachite Green (MG) waste water pollutant dye under visible light irradiation. The optimized conditions for the degradation of a 100 mL of 80 ppm MG aqueous solution are 0.03 mL H2O2, 0.038 g catalyst, and 45 min reaction time. The degradation yield at the optimized conditions under visible light irradiation was 95 %. The light source was a white color fluorescent lamp with the 40 W power and light intensity of 1.34 W/m2 measured by a digital lux meter.
       
  • Bio-assisted synthesis of bi-metallic (Ag-Zn) nanoparticles by leaf
           extract of Azadirachta indica and its antimicrobial properties

    • Abstract: In the last decade, the bio-assisted synthesis of nanoparticles has been significantly exploited seeing the shortfall of chemical synthesis and urgent need to find the substitution. The chemical synthesis of nanoparticles is a rapid process, which might be appealing in various frontiers but has got some serious issues to take care of. In pursuit of finding a process that is cleaner, non-toxic, eco-friendly, low cost, and renewable, natured introduces us to the prospect of biosynthesis. In our study, we have successfully prepared bimetallic nanoparticles through a bio-assisted route. We have formed (Ag-Zn) silver doped zinc oxide nanoparticles with the help of an aqueous leaf extract of Azadirachta indica. Ag-Zn nanoparticles were further characterized by FTIR, P-XRD, SEM-EDX methods. The data obtained from X-ray diffraction has shown the peaks of silver doped zinc at 2θ value 38.1o thereby telling particle size is approx. 12.53 nm size as calculated by Scherrer’s equation. FTIR analysis gave characteristic peaks of functional groups. SEM-EDX confirmed successful doping and grain size of the particle. The study has further characterized the anti-microbial activities of the Ag-Zn BMNPs (Bi-metallic nanopartilces) with the help of the Kirby-Bauer method showing maximum inhibition of Streptococcus aureus species. The result of the study can be advantageous to develop an understanding of the development of nano-based medicine.
       
  • Power-efficient and high-speed design of approximate full adders using
           CNFET technology

    • Abstract: Full adder cells are the major fundamental elements of larger arithmetic circuits, which are mostly located along the critical path of circuits. Therefore, the design of low-power and high-speed full adder cells is critical. In this paper, there are two new inexact full adder cells proposed based on Carbon Nanotube Field Effect Transistor (CNFET) technology. Using the HSPICE simulator by applying the 32 nm Stanford model, extensive simulations are performed at the transistor level. Different supply voltages, output loads, and ambient temperatures are involved in the operation of the cells. In addition, by applying Monte Carlo transient analysis, the effects of diameter variations of carbon nanotubes (CNTs) are examined on the performance of the proposed cells. Considering the application level, these cells are studied in image processing through MATLAB software. The superiority of the proposed cells compared to their counterparts is confirmed by extensive simulations.
       
  • Enhancing the photocatalytic activity of TiO2 nanoparticles using green
           Carbon quantum dots

    • Abstract: A simple and green method based on chemical fragmentation of wood charcoal is used to produce carbon quantum dots (CQDs). These CQDs are used to form a nanocomposite with synthesized titanium dioxide nanoparticles (TiO2/CQDs). The X-ray diffraction (XRD) analysis of this TiO2/CQDs nanocomposite has revealed that the presence of CQDs in these TiO2/CQDs does not affect the TiO2 NPs crystalline structure; while the characterization using scanning electron microscopy (SEM) analysis shows a porous structure of TiO2 NPs and TiO2/CQDs resulting from the aggregation of nanoparticles with a mean size of around 25 nm and 30 nm for TiO2 NPs and TiO2/CQDs, respectively. Furthermore, a transmission electron microscopy (TEM) analysis displays particle size around 4 nm for CQDs. Besides, the reflectance study in the visible range shows that the presence of CQDs reduces the reflection of sunlight by TiO2 NPs in TiO2/CQDs nanocomposite. Moreover, compared to TiO2 NPs, TiO2/CQDs have a higher rate for methylene blue (MB) photocatalytic degradation. Indeed, an efficiency of up to 100% within ten minutes of sun exposure for the degradation of 7.5 mg/L MB can be achieved using TiO2/CQDs in opposition to thirty minutes using TiO2NPs under the same conditions. This efficiency is obviously due to the reduction of the reflective properties of TiO2 NPs in the visible range by the presence of CQDs in the TiO2/CQDs nanocomposite. These results suggest that TiO2/CQDs could be used as heterogeneous photocatalyst for the degradation of similar compounds in water bodies under solar irradiation.
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 34.204.174.110
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-