Subjects -> MINES AND MINING INDUSTRY (Total: 82 journals)
Showing 1 - 42 of 42 Journals sorted by number of followers
Stainless Steel World     Full-text available via subscription   (Followers: 18)
Journal of Applied Geophysics     Hybrid Journal   (Followers: 16)
Journal of Metamorphic Geology     Hybrid Journal   (Followers: 15)
International Journal of Hospitality & Tourism Administration     Hybrid Journal   (Followers: 14)
European Journal of Mineralogy     Hybrid Journal   (Followers: 12)
Journal of Geology and Mining Research     Open Access   (Followers: 11)
Contributions to Mineralogy and Petrology     Hybrid Journal   (Followers: 11)
Mineral Processing and Extractive Metallurgy : Transactions of the Institutions of Mining and Metallurgy     Hybrid Journal   (Followers: 11)
Transactions of Nonferrous Metals Society of China     Hybrid Journal   (Followers: 10)
Journal of Human Resources in Hospitality & Tourism     Hybrid Journal   (Followers: 9)
Clay Minerals     Hybrid Journal   (Followers: 9)
Minerals Engineering     Hybrid Journal   (Followers: 9)
Lithos     Hybrid Journal   (Followers: 9)
International Journal of Minerals, Metallurgy, and Materials     Hybrid Journal   (Followers: 9)
Natural Resources Research     Hybrid Journal   (Followers: 8)
Geotechnical and Geological Engineering     Hybrid Journal   (Followers: 8)
Rock Mechanics and Rock Engineering     Hybrid Journal   (Followers: 7)
International Journal of Rock Mechanics and Mining Sciences     Hybrid Journal   (Followers: 6)
Canadian Mineralogist     Full-text available via subscription   (Followers: 6)
International Journal of Mining Engineering and Mineral Processing     Open Access   (Followers: 5)
Journal of Quality Assurance in Hospitality & Tourism     Hybrid Journal   (Followers: 5)
Mine Water and the Environment     Hybrid Journal   (Followers: 5)
International Journal of Mining and Mineral Engineering     Hybrid Journal   (Followers: 5)
Journal of the Southern African Institute of Mining and Metallurgy     Open Access   (Followers: 5)
Mining Engineering     Full-text available via subscription   (Followers: 5)
Resources Policy     Hybrid Journal   (Followers: 4)
International Journal of Mining Science and Technology     Open Access   (Followers: 4)
Reviews in Mineralogy and Geochemistry     Hybrid Journal   (Followers: 4)
Mineral Processing and Extractive Metallurgy Review     Hybrid Journal   (Followers: 4)
Applied Earth Science : Transactions of the Institutions of Mining and Metallurgy     Hybrid Journal   (Followers: 4)
International Journal of Mining, Reclamation and Environment     Hybrid Journal   (Followers: 4)
International Journal of Coal Geology     Hybrid Journal   (Followers: 4)
Physics and Chemistry of Minerals     Hybrid Journal   (Followers: 4)
Journal of Convention & Event Tourism     Hybrid Journal   (Followers: 4)
Mineralium Deposita     Hybrid Journal   (Followers: 4)
Lithology and Mineral Resources     Hybrid Journal   (Followers: 3)
Journal of Sustainable Mining     Open Access   (Followers: 3)
International Journal of Coal Science & Technology     Open Access   (Followers: 3)
Mining Journal     Full-text available via subscription   (Followers: 3)
Ghana Mining Journal     Full-text available via subscription   (Followers: 3)
Geology of Ore Deposits     Hybrid Journal   (Followers: 3)
Rocks & Minerals     Hybrid Journal   (Followers: 3)
Environmental Geochemistry and Health     Hybrid Journal   (Followers: 2)
Journal of Mining Science     Hybrid Journal   (Followers: 2)
Geomaterials     Open Access   (Followers: 2)
Mineralogia     Open Access   (Followers: 2)
BHM Berg- und Hüttenmännische Monatshefte     Hybrid Journal   (Followers: 2)
Mining Technology : Transactions of the Institutions of Mining and Metallurgy     Hybrid Journal   (Followers: 2)
Extractive Industries and Society     Hybrid Journal   (Followers: 2)
International Journal of Coal Preparation and Utilization     Hybrid Journal   (Followers: 2)
Mineralogy and Petrology     Hybrid Journal   (Followers: 2)
Mining Report     Hybrid Journal   (Followers: 2)
Neues Jahrbuch für Mineralogie - Abhandlungen     Full-text available via subscription   (Followers: 2)
Archives of Mining Sciences     Open Access   (Followers: 2)
Journal of Materials Research and Technology     Open Access   (Followers: 2)
Gems & Gemology     Full-text available via subscription   (Followers: 1)
Journal of Analytical and Numerical Methods in Mining Engineering     Open Access   (Followers: 1)
Rangeland Journal     Hybrid Journal   (Followers: 1)
Revista del Instituto de Investigación de la Facultad de Ingeniería Geológica, Minera, Metalurgica y Geográfica     Open Access   (Followers: 1)
Journal of Central South University     Hybrid Journal   (Followers: 1)
Mineralogical Magazine     Hybrid Journal   (Followers: 1)
CIM Journal     Hybrid Journal  
Natural Resources & Engineering     Hybrid Journal  
Mining, Metallurgy & Exploration     Hybrid Journal  
Podzemni Radovi     Open Access  
Rudarsko-geološko-naftni Zbornik     Open Access  
Journal of Mining Institute     Open Access  
International Journal of Mining and Geo-Engineering     Open Access  
Journal of China Coal Society     Open Access  
Réalités industrielles     Full-text available via subscription  
Mineral Economics     Hybrid Journal  
Minerals     Open Access  
Gold Bulletin     Hybrid Journal  
Minerals & Energy - Raw Materials Report     Hybrid Journal  
Similar Journals
Journal Cover
Gold Bulletin
Journal Prestige (SJR): 0.461
Citation Impact (citeScore): 2
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2364-821X - ISSN (Online) 2190-7579
Published by Springer-Verlag Homepage  [2469 journals]
  • Energy transfer in gold photocatalysis

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      Abstract: Abstract Over the past decade, the use of gold complex for photocatalyzed transformations has gained great attention. Within a number of photocatalzed reactions, the mode of energy transfer (EnT) is gradually disclosed, which opens a creative window for gold chemistry. This highlight covers several recent achievements of gold photocatalysis involving EnT process.
      PubDate: 2022-08-09
       
  • Evaluation of penicillin residues in milk by ELISA using aptamer bonded to
           gold nanoparticles

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      Abstract: Abstract Healthy dairy products should be free of any substances that threaten human health. However, the use of antibiotics for the treatment of lactating animals can be a risk to human health, as their residues and metabolites can be transferred into milk. Various methods are used to ensure the purity of milk. In this study, a kit based on a specific penicillin aptamer bonded to gold nanoparticles was designed to measure penicillin in milk, and its measurement was performed using ELISA colorimetric method. After synthesis of gold nanoparticles, the molarity of gold nanoparticles was calculated by UV spectrophotometer, and its synthesis was confirmed by FTIR. Salt concentrations were also optimized to bind aptamer to gold nanoparticles. The gold nanoparticles were then bonded to the specific aptamer of penicillin, and the concentration of penicillin G in the milk sample was measured by a biosensor designed by ELISA. The choice of biosensor was also examined in the presence of similar antibiotics.
      PubDate: 2022-08-09
       
  • Post-synthesis heating, a key step to tune the LPR band of gold nanorods
           covered with CTAB or embedded in a silica shell

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      Abstract: Abstract The transitioning of nanotechnology from laboratory to industrial-scale manufacturing poses various challenges in nanoparticle realization. From this perspective, beside the conventional synthetic procedure, based on the seed-mediated growth approach, a reshaping thermal strategy has been investigated to improve the control on gold nanorods aspect ratio, with the aim to point out a potential and encouraging way to better manage the scalability and reproducibility of nanoparticles. For this purpose, nanorods covered with CTAB and nanorods enclosed within a silica shell of tuned thickness have been synthesized and submitted to a post-thermal treatment at various temperatures, up to 300 °C for CTAB recovered gold nanorods (AuNR@CTAB), and up to 500 °C for silica-shell embedded gold nanorods (AuNR@SiO2). For AuNR@CTAB, through accurate temperature control, the longitudinal plasmonic band can be moved very close to the transversal one upon slight reduction of their length. Instead, for AuNR@SiO2, owing to the fully inorganic shell, a higher temperature of treatment can be reached leading to the possibility of reshaping the nanorods into spheres without the observation of any by-products.
      PubDate: 2022-08-08
       
  • Enantioselective redox gold catalysis

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      Abstract: Au(I)/Au(III) redox catalysis, also known as redox gold catalysis, has evolved as a new technique in the past decade, opening up possibilities for the cross-coupling and 1,2-difunctioalization reactions of C–C multiple bonds that were previously inaccessible with gold(I) or gold(III) catalysis. However, the enantioselective Au(I)/Au(III) redox catalysis was missing until recently. The research group of Patil and Shi independently developed new hemilabile chiral (P,N)-ligands to achieve enantioselective redox gold catalysis for the first time. Graphical abstract
      PubDate: 2022-08-04
       
  • Gold nanomaterials for biochemical sensing

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      Abstract: Gold nanomaterials have received much attention in sensing due to their unique optical and electronic properties. This article briefly summarized the synthesis, property of gold nanomaterials before focusing on their application to sensing. The synthesis of three major types of gold nanomaterials is discussed: gold nanoclusters, which are synthesized by templated method, and gold nanoparticles, which are synthesized by chemical reduction methods, and gold nanorods, which are synthesized by the seed-mediated method. More methods affecting nano properties are discussed. Properties of these gold nanomaterials are usually connected to their application. Their fluorescent, photoluminescent, chemiluminescent, electrochemiluminescent, and catalytic properties are what give them potential in sensing. For the further application of gold-based nanomaterials in sense, the author suggests that more research needs to be done on understanding their properties and surface functionalization which provide greater selectivity and sensitivity in sense. Moreover, new detection techniques need to be developed to improve detection accuracy and reduce operational complexity. Graphical abstract
      PubDate: 2022-08-03
       
  • Aurocyanide adsorption onto granular activated carbon impregnated with SDS
           anionic surfactant

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      Abstract: Abstract The impregnation of granular activated carbon with the anionic surfactant sodium dodecylsulfate (SDS) was studied and the influence on aurocyanide adsorption was evaluated. Thermodynamic and kinetic parameters were also determined. The impregnation of activated carbon with SDS improves gold adsorption by 10%, showing a cleansing effect on the carbon surface which was displayed in a higher specific surface area. Specific pore volume and average pore diameter did not undergo important changes. Increasing the temperature decreases gold adsorption on modified carbon. The standard enthalpy of adsorption and the activation energy were calculated, getting values of − 41.3 kJ/mol and 15.0 kJ/mol, respectively.
      PubDate: 2022-06-25
       
  • Characterization of breast cancer antibody (anti-HER-II) conjugated on
           PEGylated gold nanourchin for active targeting

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      Abstract: Abstract Conjugation and characterization of poly-ethylene–glycol (PEG)-functionalized gold nanourchin (GNU) with breast cancer biomarker HER-II monoclonal antibody (mAb) (i.e., anti-HER-II) for selective targeting are described. After the functionalization of GNU with PEG, the surface plasmon resonance (SPR) peak was red-shifted, indicating the increase in the hydrodynamic size of the GNU. The Fourier-transform near-infrared spectroscopy (FT-NIR) second derivative result of GNU-PEG provided overtone and combination bands of fundamental vibrational modes of protein molecular structures between 4000 and 7500 cm−1. This mainly included C–H combination and CH2 bonds, O–H first stretch overtones, the C–H first stretch overtone, and the CH2 combination first overtone. The UV–Vis absorbance showed a strong absorption of light at 227 and 275 nm corresponding to tyrosine peaks. The fluorescence emission peak at 315 nm corresponds to Stokes shift when excited by 280 nm corresponding to tyrosine in the mAb, and the peak at 497 nm likely corresponds to alanine. After conjugation of GNU-PEG with mAb, the FT-NIR indicated the bands corresponding to NH2 combination and amino acids, first overtone symmetric and antisymmetric OH stretching, C–H combination, and the second overtones and combination modes. Surface-enhanced Raman scattering (SERS) provided useful information on the molecular structure and composition of the sample within 300–3500 cm−1. The intensity behavior of SERS signals exhibited a statistical nature due to Brownian fluctuating movement. In addition, the intensity and number of SERS lines varied with the laser power. The dominant peaks were corresponding to histidine, tyrosine, tryptophan, phenylalanine, and C–H, N–H, C–N, and O–H bonds.
      PubDate: 2022-06-02
      DOI: 10.1007/s13404-022-00316-w
       
  • Gold nanocluster triggering near-infrared photocatalytic oxidations

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      Abstract: Abstract Developing efficient near-infrared photocatalyst for organic transformations is a long but challenging goal. In a recent paper in Journal of the American Chemical Society, Shuxin Wang, Jun Xuan, Manzhou Zhu and co-workers explored the gold nanocluster-triggered near-infrared photocatalytic oxidative functionalization with high efficiency. This work cultivates a new land for the application of metal nanocluster as well as near-infrared photocatalysis.
      PubDate: 2022-04-27
      DOI: 10.1007/s13404-022-00315-x
       
  • Phytoremediation ability of Helichrysum arenarium plant for Au and Ag:
           case study at Demirören village (Gümüşhane, Turkey)

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      Abstract: Abstract It was investigated ability of Helichrysum arenarium plant, in phytoextraction, phytostabilization, and phytoremediation in this study. Soil and plant samples were collected from the Demirören alteration site which has the potential of gold mineralization and analyzed for gold and silver. When the results of the analysis were evaluated, it was determined that the gold and silver contents in the soil did not show compatibility with the gold and silver contents of the plants grown at the same point. It was concluded that the high gold and silver concentrations in the plants are related to the hydrothermal alteration and weathering at the point where the plants grow. For investigation of phytoremediation ability of the plant, translocation factor (TF), bio-concentration factor (BCF), and bioaccumulation factor (BAF) were calculated. The values of TF, BAF, and BCF for Ag are equal 0.33, 0.043, and 0.13 and for Au are equal 2.04, 0.59, and 0.29, respectively. So, obtained data show that Helichrysum arenarium is not appropriate for phytoextraction and phytostabilization of gold and silver in this case, but H. arenarium can be used in phyto-mining and for biogeochemical exploration of gold. Considering that the gold and silver concentrations in the developed soil in the study area are low concentrations, it is predicted that a similar study will yield satisfactory-interesting results when it is made in plants grown on the gold mineralization/enrichment areas.
      PubDate: 2022-04-12
      DOI: 10.1007/s13404-022-00313-z
       
  • Obituary for Masatake Haruta (1947–2022)

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      PubDate: 2022-03-19
      DOI: 10.1007/s13404-022-00312-0
       
  • Assessment of microRNA-21 using gold nanoparticle-DNA conjugates based on
           colorimetric and fluorescent detection

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      Abstract: Abstract The miR-21 detection is essential for the accurate and early diagnosis or prognosis of most diseases. In the current study, the miR-21 detection method was performed based on the exploitation of the simple colorimetric biosensor due to the unique surface plasmon resonance (SPR) absorption of gold nanoparticles. AuNPs were functionalized with the specific DNA probes on the gold surface by Au-SH bond. Two strategies are proposed to detect the miR-21. In the first strategy, probes (DNA1 and DNA2) were complementary to the sequence of the miR-21. When miR-21 is introduced, the hybridization reaction is triggered between the golden nanoparticles- (GNP)-DNA conjugates and targets, resulting in changes in SPR absorption band and macroscopic color of the AuNPs solution. In the second strategy, we used a fluorescence sequence (DNA3-FAM), which was complimentary of DNA1. The DNA3-FAM was released after hybridization of miR-21 with DNA1 and DNA2. The free DNA3-FAM sequences in plate wells containing 1% agarose gel were assessed by fluorescent microscope. The combination of two strategies and conventional equipment such as UV–Vis spectrometers and fluorescent microscopes could be useful in detecting the desired miRNAs (miR-21).
      PubDate: 2022-03-15
      DOI: 10.1007/s13404-022-00308-w
       
  • Development of gold, silver, and iron nanoparticles using isolated
           berberine: its characterization and antimicrobial and cytotoxic activities
           against COLO320DM and Hela cells

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      Abstract: Abstract The current report discloses the development of gold, silver, and iron nanoparticles using berberine by green synthesis and its evaluation for antimicrobial activity and in vitro cytotoxicity against colon cancer and human cervical cancer cells. The prepared nanoparticles were characterized by Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction analysis. The characterization of results of the prepared nanoparticles satisfied the distinctive properties of the potent nanodrug. The antimicrobial potential was exhibited by all the prepared nanoparticles against the selected microbial strains. The zone of inhibition (mm) exhibited by gold nanoparticles biosynthesized using berberine (BAuNPs) was 15.66 ± 0.47 mm against Pseudomonas aeruginosa, 15.0 ± 1.41 against Escherichia coli, and 15.33 ± 1.24 mm against Staphylococcus aureus. The cytotoxicity study exhibited promising results as compared to pure berberine. The results of the MTT assay of gold nanoparticles against COLO320DM exhibited 92.27 ± 0.14% inhibition, whereas in the case of the SRB assay, it revealed 89.72 ± 0.29% inhibition as compared to other nanoparticles and pure berberine. For Hela cell lines, in the case of the MTT assay, BAuNPs exhibited 92.13 ± 0.64% inhibition while in the SRB assay, it revealed 85.56 ± 0.39% inhibition. The results of the Trypan blue assay revealed that BAuNPs showed 76.54 ± 1.00% inhibition against the COLO320DM cell line, whereas in the case of Hela cell lines, 78.03 ± 1.47% inhibition was observed. The effect exhibited by BAuNPs may be attributed to increased production of reactive oxygen species by treated carcinoma cells that results in oxidation of vital constituents which ultimately causes death of the cell. Thus, these in vitro results demonstrate the promising therapeutic applications of the BAuNPs in nanomedicine.
      PubDate: 2022-02-18
      DOI: 10.1007/s13404-022-00309-9
       
  • Comparison of polyampholyte derivative of chitosan with bisphthalimides of
           low molecular weight in the green synthesis of Au nanoparticles

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      Abstract: Abstract This work reports the chemical modification of chitosan with phthalimide moieties and the synthesis of two bisphthalimides (BPIs) with low molecular weight useful in the green synthesis of Au nanoparticles. The polyampholyte derivative of chitosan was obtained in water while the two BPIs, N,N´-(1,3-phenylene)bis(phthalimide-5-carboxylic acid) (BPI-1) and N,N´-(1,4-phenylene)bis(phthalimide-5-carboxylic acid) (BPI-2) were obtained by solid state reaction without the use of organic solvents. The polyampholyte and two BPIs were soluble in water; therefore, they were used in the green synthesis of Au nanoparticles. The characterization of three compounds was made by FTIR and 1H NMR. TEM and UV–Vis results revealed that the compounds can reduce gold ions and stabilize Au nanoparticles in the colloidal solutions. The shape of the Au nanoparticles was quasi-spherical, while the average size of Au nanoparticles stabilized with the compounds BPI-1 and BPI-2 was 3 and 12 nm, respectively. Thus, with BPI-1 was obtained Au nanoparticles with lower size than BPI-2. Finally, the average size of nanoparticles stabilized with the polyampholyte was 10 nm. However, the faster reaction to obtain nanoparticles was with the polyampholyte derivative of chitosan (5 min), due to high quantity of oxidizable groups found in the polymer structure by its high molecular weight.
      PubDate: 2022-02-15
      DOI: 10.1007/s13404-022-00310-2
       
  • Synergic effect of paclitaxel and cisplatin associated with gold
           nanoparticles on HeLa cervical cells

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      Abstract:    The combination of two or more chemotherapy drugs and nanotechnology has emerged as an effective strategy in the fight against cancer. Paclitaxel (PTX) and cisplatin show improved cytotoxic effects on being used together in the chemotherapy of various cancer types, than when used individually. However, these chemotherapy drugs have been shown to have numerous toxic effects in cancer patients. Therefore, the aim of this study was to evaluate the cytotoxicity of PTX and cisplatin associated with gold nanoparticles (AuNps) on HeLa cells containing multiple copies of human papillomavirus 18. AuNps were successfully synthesized with a mean size of 20 to 61 nm, polydispersity index ≥ 0.3, and negative surface charge. Together, PTX and cisplatin associated with AuNps showed a higher cytotoxic effect on HeLa cells than free drugs. The combination of PTX and cisplatin with AuNps potentiated their cytotoxic effects, inducing synergism between the treatments, resulting in HeLa cell death by apoptosis. Graphical abstract
      PubDate: 2022-01-22
      DOI: 10.1007/s13404-021-00305-5
       
  • Organo-gold(III) complexes via mechanochemistry in a ball mill

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      Abstract: Abstract Owing to their highly interesting applications in medicine, catalysis, and their luminescence properties, over the past decade, increasing efforts have been devoted to the synthesis of organo-gold(III) complexes. Therefore, the design of mild, practical, and modular protocols for their synthesis is a highly active field of research. In a recent paper in Angewandte Chemie, Hashmi and co-workers developed an efficient and solvent-free method for the mechanochemical synthesis of differently organo-gold(III) complexes; this method opens up a new perspective for the field.
      PubDate: 2022-01-21
      DOI: 10.1007/s13404-021-00302-8
       
  • Effect of plasmonic coupling in different assembly of gold nanorods
           studied by FDTD

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      Abstract: Abstract The influence of the orientation of gold nanorods in different assemblies has been investigated using the finite difference time domain (FDTD) simulation method. To understand the relative orientation, we vary the size and angle in dimer geometries. Significant effects of plasmon coupling emerged in longitudinal resonances having end-to-end configurations of gold nanorods. The effect of orientational plasmon coupling in dimers gives rise to both bonding and anti-bonding plasmon modes. Effects of various geometries like primary monomer, dimer, trimer, and tetramer structures have been explored and compared with their higher nanorod ensembles. The asymmetric spectral response in a 4 × 4 gold nanorods array indicates a Fano-like resonance. The variation of gap distance in ordered arrays allowed modulation of the Fano resonance mode. The plasmon modes’ resonance wavelength and field enhancement have been tuned by varying the gap distance, angular orientation, size irregularity between the nanorods, and nanorod numbers in an array. The integrated nanostructures studied here are not only significant for fundamental research but also applications in plasmon-based devices.
      PubDate: 2022-01-16
      DOI: 10.1007/s13404-022-00307-x
       
  • The potential of marine-based gold nanomaterials in cancer therapy: a
           mini-review

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      Abstract: Abstract Cancer is still one of the most common causes of death today despite advances in its detection and treatment. The present article reviews the application of marine-based gold nanoparticles in the diagnosis and treatment of cancer. The main data were collected from original research articles on the application of different marine-based gold nanoparticles in detecting and imaging cancer cells as well as in drug delivery systems and treatment of cancer. The results show the excellent anticancer potential of both gold nanoparticles and natural marine products. The most studied marine-based gold nanomaterial was chitosan-based ones, in which the role of chitosan is a stabilizer not an anticancer agent. Despite the excellent anticancer potential of different marine natural products, limited studies have been conducted using gold nanoparticles in their composition in cancer therapy. Moreover, most of these studies are related to their application as a drug delivery system not an anticancer drug. Although there are serious challenges in the application of nanoparticles in medicine, marine-based gold nanomaterials may promise an interesting novel strategy in the oncology field.
      PubDate: 2022-01-14
      DOI: 10.1007/s13404-021-00304-6
       
  • The effect of chitosan-modified gold nanoparticles in Lemna valdiviana and
           Daphnia pulex

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      Abstract: Abstract Gold nanoparticles (AuNPs) are nowadays used in many areas of science, particularly in medicine as drug release and gene carriers. The extensive use of these materials makes imperative the study of their effects on the environment after their disposal, that mostly affects the aquatic media. The present work explores the bioaccumulation and toxicity of chitosan-functionalized and non-functionalized gold nanoparticles, with primary producers (Lemna valdiviana) and primary consumers (Daphnia pulex) aquatic organisms. Bioaccumulation of 27.4 nm AuNPs and 43.1 nm chitosan-gold nanoparticles (CO-AuNPs) was evaluated in both microorganisms, finding accumulation of AuNPs and inhomogeneous aggregation of CO-AuNPs in Daphnia pulex gut, and internalization of both types of nanoparticles in Lemna valdiviana cell walls. The effective concentration of nanomaterial for 50% survival (LC50) of Daphnia pulex organisms was 1.13 mg/L for AuNPs and 0.96 mg/L for CO-AuNPs in the acute test. In Lemna valdiviana 7-day test, the EC50 for area and frond number were 1.19 mg/L and 1.26 mg/L, respectively, for AuNPs, 1.53 mg/L and 1.44 mg/L, respectively, for CO-AuNPs, finding higher toxicity of CO-AuNPs to Daphnia pulex, and AuNPs to Lemna valdiviana. The obtained results suggest that the effects of nanomaterials on the growth and survival of key organisms deserve further study, as this may lead to the development of appropriate environmental regulations.
      PubDate: 2022-01-13
      DOI: 10.1007/s13404-021-00306-4
       
  • Fibers covered with 3D interconnected network of Au nanostructures and
           their application in SERS detection

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      Abstract: Abstract A simple template-free method was developed for the fabrication of fibers whose surfaces were covered by a three-dimensional interconnected network of Au nanostructures (3D-NW AuNSs) without additional stabilizer. The EDS and XPS measurements confirmed the metallic nature of the formed 3D gold nanowire networks on the fiber surface. The morphology of these 3D-NW AuNSs can be controlled by the experimental parameters, such as reaction time, roughness of the glass fiber surface, HAuCl4, and sodium citrate concentration. The 3D gold nanowire networks showed excellent uniformity. Additionally, the nanofiber was used to accurately and reliably detect methyl red (MR), crystal violet (CV), and acridine orange (AO), which can be detected as low as 1, 10, and 5 μg/L, respectively. Since the proposed strategy is simple, cost-effective, and reproducible for the mass production of network-like gold film–covered nanofiber, it is expected to play an important role in the development of trace analytical devices.
      PubDate: 2022-01-04
      DOI: 10.1007/s13404-021-00303-7
       
  • Gold carbene complexes and beyond: new avenues in gold(I)-carbon
           coordination chemistry

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      Abstract: Abstract The different coordination modes in carbon-gold(I) complexes are spotlighted with a focus on gold(I). The emergence of gold carbene complexes and their critical discussion in the community is presented, and an overview of their bonding fundamentals and synthetic procedures is given. Several intriguing and sometimes highly reactive gold-carbon coordination complexes that were recently synthesised and isolated are reviewed and a critical outlook into their potential applications is provided. This includes vinylidene and higher cumulenylidene complexes, free carbenes with gold substituents, carbodicarbene complexes, and non-Fischer/Schrock sesquicarbene complexes.
      PubDate: 2022-01-03
      DOI: 10.1007/s13404-021-00298-1
       
 
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