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Uji S, Nakamura K, Kobayashi N. The effect of a polymer capping agent on electrodeposited silver nanoparticles in a silver deposition-based electrochromic device. Phys Chem Chem Phys 2024. [PMID: 38600848 DOI: 10.1039/d3cp06281c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
In this study, polyvinylpyrrolidone (PVP) was introduced into an Ag deposition-based electrochromic (EC) device as a capping agent for electrodeposited Ag nanoparticles (AgNPs) to improve the coloration characteristics of EC devices and to precisely control the size and shape of the AgNPs. Through the coordination of PVP molecules with Ag+ ions in the EC electrolyte, the critical voltage for the deposition of AgNPs decreased, resulting in a lower operating voltage of the EC device in comparison with the conventional one. Because particle growth and AgNP aggregation were suppressed by the capping effect of PVP, uniform electrodeposition of AgNPs was achieved. Aggregation suppression enabled vivid cyan, yellow, and red coloration using a simple driving procedure. The suppression of AgNP aggregation by PVP was demonstrated even in an electrochemical system. Furthermore, the capping effect of PVP also improved image retention. Better color retention properties were achieved even without the use of any counter-modified electrode cells.
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Affiliation(s)
- Shun Uji
- Graduate School of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
| | - Kazuki Nakamura
- Graduate School of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
| | - Norihisa Kobayashi
- Graduate School of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
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2
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Liu J, Zhang W, Wu H, Gao Z, Feng Y, Liu S. First-principles Computational Study on Adsorption and Inhibition Mechanism of Kinetic Hydrate Inhibitors. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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3
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Unravelling mechanism for detecting chromium on functionalized gold nanoparticles via a smartphone and spectrophotometric-based systems supported by CIEL*a*b* colour space and molecular dynamics. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Kamarudin D, Hashim NA, Ong BH, Faried M, Suga K, Umakoshi H, Wan Mahari WA. Alternative fouling analysis of PVDF UF membrane for surface water treatment: The credibility of silver nanoparticles. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Retardation of Bacterial Biofilm Formation by Coating Urinary Catheters with Metal Nanoparticle-Stabilized Polymers. Microorganisms 2022; 10:microorganisms10071297. [PMID: 35889016 PMCID: PMC9319761 DOI: 10.3390/microorganisms10071297] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/21/2022] [Accepted: 06/23/2022] [Indexed: 02/06/2023] Open
Abstract
Urinary catheter infections remain an issue for many patients and can complicate their health status, especially for individuals who require long-term catheterization. Catheters can be colonized by biofilm-forming bacteria resistant to the administered antibiotics. Therefore, this study aimed to investigate the efficacy of silver nanoparticles (AgNPs) stabilized with different polymeric materials generated via a one-step simple coating technique for their ability to inhibit biofilm formation on urinary catheters. AgNPs were prepared and characterized to confirm their formation and determine their size, charge, morphology, and physical stability. Screening of the antimicrobial activity of nanoparticle formulations and determining minimal inhibitory concentration (MIC) and their cytotoxicity against PC3 cells were performed. Moreover, the antibiofilm activity and efficacy of the AgNPs coated on the urinary catheters under static and flowing conditions were examined against a clinical isolate of Escherichia coli. The results showed that the investigated polymers could form physically stable AgNPs, especially those prepared using polyvinyl pyrrolidone (PVP) and ethyl cellulose (EC). Preliminary screening and MIC determinations suggested that the AgNPs-EC and AgNPs-PVP had superior antibacterial effects against E. coli. AgNPs-EC and AgNPs-PVP inhibited biofilm formation to 58.2% and 50.8% compared with AgNPs-PEG, silver nitrate solution and control samples. In addition, coating urinary catheters with AgNPs-EC and AgNPs-PVP at concentrations lower than the determined IC50 values significantly (p < 0.05; t-test) inhibited bacterial biofilm formation compared with noncoated catheters under both static and static and flowing conditions using two different types of commercial Foley urinary catheters. The data obtained in this study provide evidence that AgNP-coated EC and PVP could be useful as potential antibacterial and antibiofilm catheter coating agents to prevent the development of urinary tract infections caused by E. coli.
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Influence of Polyvinylpyrrolidone Concentration on Properties and Anti-Bacterial Activity of Green Synthesized Silver Nanoparticles. MICROMACHINES 2022; 13:mi13050777. [PMID: 35630244 PMCID: PMC9146159 DOI: 10.3390/mi13050777] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/08/2022] [Accepted: 05/13/2022] [Indexed: 01/27/2023]
Abstract
Environmentally green synthesis of stable polyvinyl pyrrolidone (PVP)-capped silver nanoparticles (PVP-AgNPs) was successfully carried out. The present study focused on investigating the influence of adding PVP during the synthesis process on the size, optical properties and antibacterial effect of silver nanoparticles produced. An aqueous extract of Eucalyptus camaldulensis leaves was used as a reducing agent. The effects of different PVP concentrations and reducing time on the synthesis of nanoparticles (NPs) were characterized by UV–Vis spectrophotometry, scanning electron microscopy (SEM), energy dispersive spectrum (EDX), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) and nano tracker analysis (NTA). The addition of PVP was studied. The prepared PVP-AgNPs were spherical with an average size of 13 nm. FTIR analysis confirmed that PVP protects AgNPs by a coordination bond between silver nanoparticles and both N and O of PVP. DLS results indicated the good dispersion of silver nanoparticles. PVP-AgNPs were found to be stable for nearly 5 months. Antibacterial studies through the agar well diffusion method confirmed that silver nanoparticles synthesized using PVP had no inhibitor activity toward Gram-positive and Gram-negative bacteria as opposed to silver nanoparticles prepared without adding PVP, which showed a significant antibacterial activity towards some of the tested pathogens.
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Multilayered Mesoporous Composite Nanostructures for Highly Sensitive Label-Free Quantification of Cardiac Troponin-I. BIOSENSORS 2022; 12:bios12050337. [PMID: 35624638 PMCID: PMC9138364 DOI: 10.3390/bios12050337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 11/18/2022]
Abstract
Cardiac troponin-I (cTnI) is a well-known biomarker for the diagnosis and control of acute myocardial infarction in clinical practice. To improve the accuracy and reliability of cTnI electrochemical immunosensors, we propose a multilayer nanostructure consisting of Fe3O4-COOH labeled anti-cTnI monoclonal antibody (Fe3O4-COOH-Ab1) and anti-cTnI polyclonal antibody (Ab2) conjugated on Au-Ag nanoparticles (NPs) decorated on a metal–organic framework (Au-Ag@ZIF-67-Ab2). In this design, Fe3O4-COOH was used for separation of cTnI in specimens and signal amplification, hierarchical porous ZIF-67 extremely enhanced the specific surface area, and Au-Ag NPs synergically promoted the conductivity and sensitivity. They were additionally employed as an immobilization platform to enhance antibody loading. Electron microscopy images indicated that Ag-Au NPs with an average diameter of 1.9 ± 0.5 nm were uniformly decorated on plate-like ZIF-67 particles (with average size of 690 nm) without any agglomeration. Several electrochemical assays were implemented to precisely evaluate the immunosensor performance. The square wave voltammetry technique exhibited the best performance with a sensitivity of 0.98 mA mL cm−2 ng−1 and a detection limit of 0.047 pg mL−1 in the linear range of 0.04 to 8 ng mL−1.
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8
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Zhang Y, Le Friec A, Chen M. 3D anisotropic conductive fibers electrically stimulated myogenesis. Int J Pharm 2021; 606:120841. [PMID: 34216768 DOI: 10.1016/j.ijpharm.2021.120841] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 06/21/2021] [Accepted: 06/28/2021] [Indexed: 12/17/2022]
Abstract
Recapitulation of in vivo environments that drive muscle cells to organize into a physiologically relevant 3D architecture remains a major challenge for muscle tissue engineering. To recreate electrophysiology of muscle tissues, electroactive biomaterials have been used to stimulate muscle cells with exogenous electrical fields. In particular, the use of electroactive biomaterials with an anisotropic micro-/nanostructure that closely mimic the native skeletal-muscle extracellular matrix (ECM) is desirable for skeletal muscle tissue engineering. Herein, we present a hierarchically organized, anisotropic, and conductive Polycaprolactone/gold (PCL/Au) scaffold for guiding myoblasts alignment and promoting the elongation and maturation of myotubes under electrical stimulation. Culturing with H9c2 myoblasts cells indicated that the nanotopographic cues was crucial for nuclei alignment, while the presence of microscale grooves effectively enhanced both the formation and elongation of myotubes. The anisotropic structure also leads to anisotropic conductivity. Under electrical stimulation, the elongation and maturation of myotubes were significantly enhanced along the anisotropic scaffold. Specifically, compared to the unstimulated group (0 V), the myotube area percentage increased by 1.4, 1.9 and 2.4 times in the 1 V, 2 V, 3 V groups, respectively. In addition, the myotube average length in the 1 V group increased by 1.3 times compared to that of the unstimulated group, and significantly increased by 1.8 and 2.0 times in the 2 V, 3 V groups, respectively. Impressively, the longest myotubes reached more than 4 mm in both 2 V and 3 V groups. Overall, our conductive, anisotropic 3D nano/microfibrous scaffolds with the application of electrical stimulation provides a desirable platform for skeletal muscle tissue engineering.
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Affiliation(s)
- Yanping Zhang
- Interdisciplinary Nanoscience Center, Aarhus University, Aarhus, Denmark
| | - Alice Le Friec
- Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark
| | - Menglin Chen
- Interdisciplinary Nanoscience Center, Aarhus University, Aarhus, Denmark; Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark.
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Chen Y, Li J, Wang F, Yang H, Liu L. Adsorption of tetracyclines onto polyethylene microplastics: A combined study of experiment and molecular dynamics simulation. CHEMOSPHERE 2021; 265:129133. [PMID: 33276997 DOI: 10.1016/j.chemosphere.2020.129133] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 06/12/2023]
Abstract
Microplastics are a kind of new organic pollutant in the environment. In this study, the adsorption of tetracyclines (TCs), including tetracycline hydrochloride (TC), chlortetracycline hydrochloride (CTC) and oxytetracycline hydrochloride (OTC) onto polyethylene (PE) microplastics in aqueous solutions were investigated. The mechanism of the adsorption behavior was preliminarily explored by adsorption kinetics, isotherms, and thermodynamics, in combination with scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). In addition, molecular dynamics (MD) simulation was applied to investigate the adsorption processes of TCs on PE at a molecular level. It was found that the adsorption behaviors of TCs reached an equilibrium state within 30 h. The experimental data showed that adsorption capacities of TCs onto PE were as follows: OTC (64.40 ± 2.38 μg/g)>CTC (63.36 ± 4.92 μg/g)>TC (53.52 ± 3.43 μg/g). TC sorption onto PE increased with pH, peaking at around pH 6 and then decreased. The increase of ionic strength in the solution led to the reduced adsorption capacity of TC onto PE. The results indicated that the experimental data were well fitted by the pseudo-second-order model and the Freundlich isotherm model, indicating both monolayer and multilayer coverage of TCs onto the surface of PE. The results of MD simulation showed that PE can effectively adsorb the TCs molecule mainly through non-bond interactions, and PE exhibited the highest affinity for CTC and OTC, followed by TC.
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Affiliation(s)
- Yajun Chen
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Environment, Nanjing Normal University, Nanjing, 210023, China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, School of Geography Science, Nanjing Normal University, Nanjing, 210023, China
| | - Jining Li
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Environment, Nanjing Normal University, Nanjing, 210023, China
| | - Fenghe Wang
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Environment, Nanjing Normal University, Nanjing, 210023, China.
| | - Hao Yang
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, School of Geography Science, Nanjing Normal University, Nanjing, 210023, China
| | - Lei Liu
- Department of Civil and Resource Engineering, Dalhousie University, Halifax, Nova Scotia, B3J1Z1, Canada
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10
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An investigation of the effect of PVP-coated silver nanoparticles on the interaction between clonazepam and bovine serum albumin based on molecular dynamics simulations and molecular docking. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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11
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Wang Y, Zhang Y, Zhang Z, Su Y, Wang Z, Dong M, Chen M. An injectable high-conductive bimaterial scaffold for neural stimulation. Colloids Surf B Biointerfaces 2020; 195:111210. [DOI: 10.1016/j.colsurfb.2020.111210] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/10/2020] [Accepted: 06/19/2020] [Indexed: 01/20/2023]
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12
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Raza A, Biswas A, Zehra A, Mengesha A. Multiple tier detection of TNT using curcumin functionalized silver nanoparticles. Forensic Sci Int Synerg 2020; 2:240-247. [PMID: 32885162 PMCID: PMC7452642 DOI: 10.1016/j.fsisyn.2020.08.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/02/2020] [Accepted: 08/03/2020] [Indexed: 12/27/2022]
Abstract
The rapid, selective and sensitive detection of trinitrotoluene (TNT), which is widely used in terrorist activities and also a major environmental contaminant is prime concern for the scientific community dealing with environmental problems and national security. This paper described unprecedented CAgP based multiple tier probe employing U.V.–Vis., DLS & SERS techniques for highly selective, rapid and ultrasensitive detection of TNT up to 0.1 nM level. The as synthesized CAgP made possible the naked eye detection of TNT in the form of flakes in real time. The developed method due to its multiple tier approach utilizing the same sample could easily be extended to a high-throughput format and can be utilized for rapid and reliable trace detection of TNT, for on-site screenings in airports, analysis of forensic samples, and environmental analysis. TNT can interact with curcumin functionalized Ag NPs through p-donor-acceptor interaction. Curcumin functionalized Ag NPs can be used as an ultrasensitive optical probe for TNT detection. The probe has an excellent selectivity for TNT against other nitro compounds. The probe can detect TNT at multiple levels using U.V–Vis., DLS and SERS.
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Affiliation(s)
- Ali Raza
- Department of Forensic Chemistry & Toxicology, Abaya Campus, Arba Minch University, Arba Minch, Ethiopia
| | - Amitabh Biswas
- Department of Forensic Chemistry & Toxicology, Abaya Campus, Arba Minch University, Arba Minch, Ethiopia
| | - Ali Zehra
- Department of Forensic Chemistry & Toxicology, Abaya Campus, Arba Minch University, Arba Minch, Ethiopia
| | - Abdurrohman Mengesha
- Department of Forensic Chemistry & Toxicology, Abaya Campus, Arba Minch University, Arba Minch, Ethiopia
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Wang J, Xu H, Ao C, Pan X, Luo X, Wei S, Li Z, Zhang L, Xu ZL, Li Y. Au@Pt Nanotubes within CoZn-Based Metal-Organic Framework for Highly Efficient Semi-hydrogenation of Acetylene. iScience 2020; 23:101233. [PMID: 32629604 PMCID: PMC7322249 DOI: 10.1016/j.isci.2020.101233] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/30/2020] [Accepted: 06/01/2020] [Indexed: 01/16/2023] Open
Abstract
Designing nanocatalysts with synergetic functional component is a desirable strategy to achieve both high activity and selectivity for industrially important hydrogenation reaction. Herein, we fabricated a core-shell hollow Au@Pt NTs@ZIFs (ZIF, zeolitic imidazolate framework; NT, nanotube) nanocomposite as highly efficient catalysts for semi-hydrogenation of acetylene. Hollow Au@Pt NTs were synthesized by epitaxial growth of Pt shell on Au nanorods followed with oxidative etching of Au@Pt nanorod. The obtained hollow Au@Pt NTs were then homogeneously encapsulated within ZIFs through in situ crystallization. By combining the high activity of bimetallic nanotube and gas enrichment property of porous metal-organic frameworks, hollow Au@Pt NT@ZIF catalyst was demonstrated to show superior catalytic performance for the semi-hydrogenation of acetylene, in terms of both selectivity and activity, over those of monometallic Au and solid bimetal nanorod@ZIF counterparts. This catalysts design idea is believed to be inspirable for the development of highly efficient nanocomposite catalysts. Core-shell nanocomposite catalysts M@ZIFs are assembled The M NRs and NTs are well dispersed and fully encapsulated in ZIF-67 and ZIF-8 Au@PtNT enhance the selectivity and conversion for the semi-hydrogenation of acetylene DFT calculations show Au@PtNT has lower energy barrier compared with Au@PtNR
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Affiliation(s)
- Jiajia Wang
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Haitao Xu
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Chengcheng Ao
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Xinbo Pan
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xikuo Luo
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - ShengJie Wei
- Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Zhi Li
- Department of Chemistry, Tsinghua University, 100084 Beijing, China.
| | - Lidong Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China.
| | - Zhen-Liang Xu
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yadong Li
- Department of Chemistry, Tsinghua University, 100084 Beijing, China
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14
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Optimization of synthesis for shape and size controlled silver nanoparticles using response surface methodology. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124647] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Granata G, Tsendorj U, Liu W, Tokoro C. Direct recovery of copper nanoparticles from leach pad drainage by surfactant-assisted cementation with iron powder. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123719] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Kyrychenko A, Blazhynska MM, Slavgorodska MV, Kalugin ON. Stimuli-responsive adsorption of poly(acrylic acid) onto silver nanoparticles: Role of polymer chain length and degree of ionization. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.130] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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17
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Ehara M, Priyakumar UD. Gold‐Palladium Nanocluster Catalysts for Homocoupling: Electronic Structure and Interface Dynamics. CHEM REC 2019; 19:947-959. [DOI: 10.1002/tcr.201800177] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/11/2018] [Indexed: 12/28/2022]
Affiliation(s)
- Masahiro Ehara
- Institute for Molecular Science and Research Center for Computational Science 38 Nishigo-Naka, Myodaiji Okazaki 444-8585 Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB)Kyoto University Kyoto 615-8245 Japan
| | - U. Deva Priyakumar
- Center for Computational Natural Sciences and BioinformaticsInternational Institute of Information Technology Hyderabad 500 032 India
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18
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Vetten M, Gulumian M. Differences in uptake of 14 nm PEG-liganded gold nanoparticles into BEAS-2B cells is dependent on their functional groups. Toxicol Appl Pharmacol 2019; 363:131-141. [DOI: 10.1016/j.taap.2018.11.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 11/26/2018] [Accepted: 11/28/2018] [Indexed: 01/30/2023]
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19
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Jiadong Z, Yanyan S, Sun Z. Bimetallic nanoporous Pd-Ag prepared by dealloying with polyvinylpyrrolidone and their electrocatalytic properties. NANOTECHNOLOGY 2018; 29:485401. [PMID: 30204126 DOI: 10.1088/1361-6528/aae05e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bimetallic nanoporous Pd-Ag solid solution alloys with hierarchical structure were prepared by dealloying melt-spun Al-Pd-Ag ribbons in a 10 wt% H3PO4 solution. Electrocatalytic properties of nanoporous Pd-Ag alloys were measured in comparison with the nanoporous Pd without Ag. Experimental results showed that the nanoporous Pd-Ag alloys displayed electrocatalytic properties superior to their Ag-free counterparts. In particular, the optimised composition was revealed to be Pd/Ag = 3/2 in atomic ratio in the precursor with fixed 85 at% Al alloys, which yielded in a peak current density in the nanoporous Pd-Ag alloy two times that of the pure Pd one. The electrocatalytic activity of nanoporous Pd-Ag alloy with refined microstructure was further increased up to three times of the pure Pd one by adding 1 mM polyvinylpyrrolidone (PVP) into the H3PO4 solution. The underlying mechanism of refinement was related to a restriction effect on the free diffusion of Pd and Ag under adsorption of the PVP macromolecules. The significant improvement in the electrocatalytic properties was attributed to the dual promotion by the electron transfer from PVP to Pd-Ag and by a synergistic effect between Pd and Ag.
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Affiliation(s)
- Zuo Jiadong
- School of Science, MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China. State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
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20
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Kobeissi JM, Hassan GF, Karam P. Silver-Modified Cross-Linked Polyvinylpyrrolidone and Its Antibacterial Activity. ACS APPLIED BIO MATERIALS 2018; 1:1864-1870. [DOI: 10.1021/acsabm.8b00377] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jana M. Kobeissi
- Chemistry Department, American University of Beirut, P.O. Box 11-0236, Riad El-Solh, 1107 2020 Beirut, Lebanon
| | - Ghandi F. Hassan
- Chemistry Department, American University of Beirut, P.O. Box 11-0236, Riad El-Solh, 1107 2020 Beirut, Lebanon
| | - Pierre Karam
- Chemistry Department, American University of Beirut, P.O. Box 11-0236, Riad El-Solh, 1107 2020 Beirut, Lebanon
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Blazhynska MM, Kyrychenko A, Kalugin ON. Molecular dynamics simulation of the size-dependent morphological stability of cubic shape silver nanoparticles. MOLECULAR SIMULATION 2018. [DOI: 10.1080/08927022.2018.1469751] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
| | - Alexander Kyrychenko
- School of Chemistry, V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
| | - Oleg N. Kalugin
- School of Chemistry, V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
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22
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Kyrychenko A, Pasko DA, Kalugin ON. Poly(vinyl alcohol) as a water protecting agent for silver nanoparticles: the role of polymer size and structure. Phys Chem Chem Phys 2018; 19:8742-8756. [PMID: 28217797 DOI: 10.1039/c6cp05562a] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemical modification of silver nanoparticles (AgNPs) with a stabilizing agent, such as poly(vinyl alcohol) (PVA), plays an important role in shape-controlled seeded-growth and colloidal stability. However, theoretical aspects of the stabilizing mechanism of PVA are still poorly understood. To gain a better understanding of the role of PVA in water protecting effects for silver nanoparticles, we developed an atomistic model of a AgNP grafted with single-chain PVA of various lengths. Our model, designed for classical molecular dynamics (MD) simulations, approximates the AgNP as a quasi-spherical silver nanocrystal with 3.9 nm diameter and uses a united-atom representation for PVA with its polymer chain length varying from 220 up to 1540 repeating units. We found that PVA adsorbs onto the AgNP surface through multiple non-covalent interactions, among which non-covalent bonding of the hydroxyl groups plays a key role. The analysis of adsorption isotherms by using the Hill, Scatchard, and McGhee & von Hippel models exhibits evidence for positive binding cooperativity with the cooperativity parameter varying from 1.55 to 2.12. Our results indicate that the size of the PVA polymer rather than its structure plays a crucial role in providing water protecting effects for the AgNP core, varying from 40% up to 91%. The water-protecting efficiency was well approximated by the Langmuir-Freundlich equation, allowing us to predict that the saturated coverage of the nanoparticle of a given diameter of 3.9 nm should occur when the PVA molecular weight approaches 115 kDa, which corresponds to the number of vinyl alcohol monomers being equal to 3100 units.
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Affiliation(s)
- Alexander Kyrychenko
- Institute of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine. and School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine
| | - Dmitry A Pasko
- School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine
| | - Oleg N Kalugin
- School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine
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Hollow-fiber flow field-flow fractionation and multi-angle light scattering as a new analytical solution for quality control in pharmaceutical nanotechnology. Microchem J 2018. [DOI: 10.1016/j.microc.2016.12.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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24
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Marassi V, Di Cristo L, Smith SGJ, Ortelli S, Blosi M, Costa AL, Reschiglian P, Volkov Y, Prina-Mello A. Silver nanoparticles as a medical device in healthcare settings: a five-step approach for candidate screening of coating agents. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171113. [PMID: 29410826 PMCID: PMC5792903 DOI: 10.1098/rsos.171113] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 12/20/2017] [Indexed: 05/25/2023]
Abstract
Silver nanoparticle-based antimicrobials can promote a long lasting bactericidal effect without detrimental toxic side effects. However, there is not a clear and complete protocol to define and relate the properties of the particles (size, shape, surface charge, ionic content) with their specific activity. In this paper, we propose an effective multi-step approach for the identification of a 'purpose-specific active applicability window' to maximize the antimicrobial activity of medical devices containing silver nanoparticles (Ag NPs) (such as surface coaters), minimizing any consequent risk for human health (safety by design strategy). The antimicrobial activity and the cellular toxicity of four types of Ag NPs, differing in their coating composition and concentration have been quantified. Through the implementation of flow-field flow fractionation, Ag NPs have been characterized in terms of metal release, size and shape. The particles are fractionated in the process while being left unmodified, allowing for the identification of biological particle-specific contribution. Toxicity and inflammatory response in vitro have been assessed on human skin models, while antimicrobial activity has been monitored with both non-pathogenic and pathogenic Escherichia coli. The main benefit associated with such approach is the comprehensive assessment of the maximal effectiveness of candidate nanomaterials, while simultaneously indexing their properties against their safety.
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Affiliation(s)
- Valentina Marassi
- Department of Chemistry ‘G. Ciamician’, Via Selmi 2, 40126 Bologna, Italy
| | - Luisana Di Cristo
- Department of Clinical Medicine, Trinity Translational Medicine Institute (TTMI), School of Medicine, Trinity College, Dublin 8, Republic of Ireland
| | - Stephen G. J. Smith
- Department of Clinical Medicine, Trinity Translational Medicine Institute (TTMI), School of Medicine, Trinity College, Dublin 8, Republic of Ireland
- Department of Clinical Microbiology, Sir Patrick Dun Research Laboratory, School of Medicine, Trinity College, Dublin 8, Republic of Ireland
| | - Simona Ortelli
- Institute of Science and Technology for Ceramics (CNR-ISTEC), National Research Council of Italy, Via Granarolo 64, 48018 Faenza, RA, Italy
| | - Magda Blosi
- Institute of Science and Technology for Ceramics (CNR-ISTEC), National Research Council of Italy, Via Granarolo 64, 48018 Faenza, RA, Italy
| | - Anna L. Costa
- Institute of Science and Technology for Ceramics (CNR-ISTEC), National Research Council of Italy, Via Granarolo 64, 48018 Faenza, RA, Italy
| | | | - Yuri Volkov
- Department of Clinical Medicine, Trinity Translational Medicine Institute (TTMI), School of Medicine, Trinity College, Dublin 8, Republic of Ireland
| | - Adriele Prina-Mello
- Department of Clinical Medicine, Trinity Translational Medicine Institute (TTMI), School of Medicine, Trinity College, Dublin 8, Republic of Ireland
- AMBER Centre and CRANN Institute, Trinity College Dublin, Dublin 2, Republic of Ireland
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25
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Green synthesis of silver nanoparticles and investigation of their colorimetric sensing and cytotoxicity effects. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.05.145] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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26
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Lau CP, Abdul-Wahab MF, Jaafar J, Chan GF, Abdul Rashid NA. Toxic effect of high concentration of sonochemically synthesized polyvinylpyrrolidone-coated silver nanoparticles on Citrobacter sp. A1 and Enterococcus sp. C1. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2017; 50:427-434. [DOI: 10.1016/j.jmii.2015.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 06/20/2015] [Accepted: 08/31/2015] [Indexed: 11/25/2022]
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27
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Guettari M, Belaidi A, Abel S, Tajouri T. Polyvinylpyrrolidone Behavior in Water/Ethanol Mixed Solvents: Comparison of Modeling Predictions with Experimental Results. J SOLUTION CHEM 2017. [DOI: 10.1007/s10953-017-0649-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Gatemala H, Ekgasit S, Wongravee K. High purity silver microcrystals recovered from silver wastes by eco-friendly process using hydrogen peroxide. CHEMOSPHERE 2017; 178:249-258. [PMID: 28329714 DOI: 10.1016/j.chemosphere.2017.03.051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 02/21/2017] [Accepted: 03/12/2017] [Indexed: 06/06/2023]
Abstract
A simple, rapid, and environmentally friendly process using hydrogen peroxide, was developed for recovering high purity silver directly from industry and laboratory wastes. Silver ammine complex, [Ag(NH3)2]+Cl-, derived from AgCl were generated and then directly reduced using H2O2 to reliably turn into high purity microcrystalline silver (99.99%) examined by EDS and XRD. Morphology of the recovered silver microcrystals could be selectively tuned by an addition of poly(vinyl pyrrolidone). The main parameters in the recovering process including pH, concentration of Ag+ and the mole ratio of H2O2:Ag+ were carefully optimized though the central composite design (CCD). The optimized condition was employed for a trial recovery of 50 L silver ammine complex prepared from a collection of silver-wastes during 3-year research on industrial nanoparticle production. The recovered silver microcrystals >700 g could be recovered with 91.27%. The remaining solution after filtering of the recovered silver microcrystals can be used repeatedly (at least 8 cycles) without losing recovery efficiency. Matrix interferences including Pb2+ and Cl- play a minimal role in our silver recovery process. Furthermore, the direct usage of the recovered silver microcrystals was demonstrated by using as a raw material of silver clay for creating a set of wearable silver jewelries.
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Affiliation(s)
- Harnchana Gatemala
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phyathai Road, Patumwan, Bangkok 10330, Thailand
| | - Sanong Ekgasit
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phyathai Road, Patumwan, Bangkok 10330, Thailand
| | - Kanet Wongravee
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phyathai Road, Patumwan, Bangkok 10330, Thailand; Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330 Thailand.
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29
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Wu Z, Yang S, Wu W. Shape control of inorganic nanoparticles from solution. NANOSCALE 2016; 8:1237-59. [PMID: 26696235 DOI: 10.1039/c5nr07681a] [Citation(s) in RCA: 189] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Inorganic materials with controllable shapes have been an intensely studied subject in nanoscience over the past decades. Control over novel and anisotropic shapes of inorganic nanomaterials differing from those of bulk materials leads to unique and tunable properties for widespread applications such as biomedicine, catalysis, fuels or solar cells and magnetic data storage. This review presents a comprehensive overview of shape-controlled inorganic nanomaterials via nucleation and growth theory and the control of experimental conditions (including supersaturation, temperature, surfactants and secondary nucleation), providing a brief account of the shape control of inorganic nanoparticles during wet-chemistry synthetic processes. Subsequently, typical mechanisms for shape-controlled inorganic nanoparticles and the general shape of the nanoparticles formed by each mechanism are also expounded. Furthermore, the differences between similar mechanisms for the shape control of inorganic nanoparticles are also clearly described. The authors envision that this review will provide valuable guidance on experimental conditions and process control for the synthesis of inorganic nanoparticles with tunable shapes in the solution state.
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Affiliation(s)
- Zhaohui Wu
- Department of Chemical Engineering, Kyung Hee University, Seocheon-Dong, Giheung-Gu, 446-701 Yongin-Si, Korea and Laboratory of Printable Functional Nanomaterials and Printed Electronics, School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China
| | - Shuanglei Yang
- Laboratory of Printable Functional Nanomaterials and Printed Electronics, School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China and College of Chemical and Environmental Engineering, Qingdao University, Qingdao, P. R. China
| | - Wei Wu
- Laboratory of Printable Functional Nanomaterials and Printed Electronics, School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, SAR, P. R. China.
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30
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Şenol AM, Metin Ö, Acar M, Onganer Y, Meral K. The interaction of fluorescent Pyronin Y molecules with monodisperse silver nanoparticles in chloroform. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.09.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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Yang X, Yin Z, Chen F, Hu J, Yang Y. Organic matter induced mobilization of polymer-coated silver nanoparticles from water-saturated sand. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 529:182-190. [PMID: 26011614 DOI: 10.1016/j.scitotenv.2015.05.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 05/14/2015] [Accepted: 05/16/2015] [Indexed: 06/04/2023]
Abstract
Mobilization of polymer-coated silver nanoparticles (AgNPs) by anionic surfactant (sodium dodecylbenzenesulphonate: SDBS), amino acid derivative (N-acetylcysteine: NAC), and chelate (ethylenediaminetetraacetic acid: EDTA) in water-saturated sand medium was explored based on carefully designed column tests. Exposure experiments monitoring the size evolution of polyvinylpyrrolidone (PVP) coated AgNPs in organic solutions confirm the capacity of SDBS, NAC and EDTA to partly displace PVP. Single Pulse Column Experiment (SPCE) results show both the PVP polymer and the silver core controlled AgNP deposition while the effect of the PVP was dominant. Results of Co-injected Pulse Column Experiments (CPCEs) where AgNP and SDBS or NAC were co-injected into the column following a very short mixing (<1 s) disprove our hypothesis that coating-alternation by particle associated organic would mobilize irreversibly deposited particles from the uncoated sand, while surface charge modification by adsorbed NAC was identified as a potential mobilizing mechanism for AgNP from the iron-oxide-coated sand. Triple Pulse Column Experiment (TPCE) results confirm that such a charging effect of the adsorbed organic molecules may enable SDBS and NAC to mobilize AgNPs from the iron-oxide-coated sands. TPCE results with five distinct levels of SDBS indicate that concentration-stimulated change in the SDBS format from an individual to a micelle significantly increased the mobilizing efficiency and site blockage of SDBS. Although being an electrolyte, EDTA did not mobilize AgNPs, as the case with SDBS or NAC, as it dissolved the iron oxides which in turn prevented EDTA adsorption on sand. The findings have implications for better understanding the behavior of polymer-coated nanoparticles in organic-presented groundwater systems, i.e., detachment-associated uncertainty in exposure prediction of the nanomaterials.
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Affiliation(s)
- Xinyao Yang
- Ministry of Education Key Lab for Eco-restoration of Contaminated Environment, Shenyang University, No. 21, South Wanghua Street, Shenyang 110044, China.
| | - Ziyi Yin
- College of Resources and Environment, Sichuan Agricultural University, No. 211, Huiming Road, Chengdu 611130, China
| | - Fangmin Chen
- College of Resources and Environment, Sichuan Agricultural University, No. 211, Huiming Road, Chengdu 611130, China
| | - Jingjing Hu
- College of Resources and Environment, Sichuan Agricultural University, No. 211, Huiming Road, Chengdu 611130, China
| | - Yuesuo Yang
- Ministry of Education Key Lab for Eco-restoration of Contaminated Environment, Shenyang University, No. 21, South Wanghua Street, Shenyang 110044, China
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32
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D’Souza S, Mashazi P, Britton J, Nyokong T. Effects of differently shaped silver nanoparticles on the photophysics of pyridylsulfanyl-substituted phthalocyanines. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.06.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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The antibacterial activity of ceramsite coated by silver nanoparticles in micropore. Appl Biochem Biotechnol 2015; 176:267-76. [PMID: 25820386 DOI: 10.1007/s12010-015-1572-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 03/12/2015] [Indexed: 10/23/2022]
Abstract
In the present study, ceramsite was combined with silver nanoparticles (AgNPs) to fabricate a new nanocomposite for water disinfection. The ceramsite was prepared by fly ash, straw ash, and cement. AgNPs were synthesized using polyvinylpyrrolidone (PVP) as the capping agent. The nanocomposite was prepared by self-aggregation of AgNPs on the surface of the ceramsite. AgNPs capped with PVP can form a thin film on the surface of micropore in ceramsite. The nanocomposite can inhibit bacteria growth and induce damage of the cell membrane of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). Therefore, the nanocomposite is a new material which can be used for disinfection in drinking water.
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34
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Suchomel P, Kvitek L, Panacek A, Prucek R, Hrbac J, Vecerova R, Zboril R. Comparative study of antimicrobial activity of AgBr and Ag nanoparticles (NPs). PLoS One 2015; 10:e0119202. [PMID: 25781988 PMCID: PMC4363559 DOI: 10.1371/journal.pone.0119202] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 01/11/2015] [Indexed: 11/30/2022] Open
Abstract
The diverse mechanism of antimicrobial activity of Ag and AgBr nanoparticles against gram-positive and gram-negative bacteria and also against several strains of candida was explored in this study. The AgBr nanoparticles (NPs) were prepared by simple precipitation of silver nitrate by potassium bromide in the presence of stabilizing polymers. The used polymers (PEG, PVP, PVA, and HEC) influence significantly the size of the prepared AgBr NPs dependently on the mode of interaction of polymer with Ag+ ions. Small NPs (diameter of about 60–70 nm) were formed in the presence of the polymer with low interaction as are PEG and HEC, the polymers which interact with Ag+ strongly produce nearly two times bigger NPs (120–130 nm). The prepared AgBr NPs were transformed to Ag NPs by the reduction using NaBH4. The sizes of the produced Ag NPs followed the same trends – the smallest NPs were produced in the presence of PEG and HEC polymers. Prepared AgBr and Ag NPs dispersions were tested for their biological activity. The obtained results of antimicrobial activity of AgBr and Ag NPs are discussed in terms of possible mechanism of the action of these NPs against tested microbial strains. The AgBr NPs are more effective against gram-negative bacteria and tested yeast strains while Ag NPs show the best antibacterial action against gram-positive bacteria strains.
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Affiliation(s)
- Petr Suchomel
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
| | - Libor Kvitek
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
- * E-mail:
| | - Ales Panacek
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
| | - Robert Prucek
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
| | - Jan Hrbac
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
| | - Renata Vecerova
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacky University Olomouc, Czech Republic
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
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35
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Gatemala H, Pienpinijtham P, Thammacharoen C, Ekgasit S. Rapid fabrication of silver microplates under an oxidative etching environment consisting of O2/Cl−, NH4OH/H2O2, and H2O2. CrystEngComm 2015. [DOI: 10.1039/c5ce00603a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chloride ions are essential for creating an etching environment capable of selective dissolution of singly and multiply twinned crystals, while leaving plate structures unaffected.
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Affiliation(s)
- Harnchana Gatemala
- Sensor Research Unit
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University 254 Phyathai Road
- Patumwan
| | - Prompong Pienpinijtham
- Sensor Research Unit
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University 254 Phyathai Road
- Patumwan
| | - Chuchaat Thammacharoen
- Sensor Research Unit
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University 254 Phyathai Road
- Patumwan
| | - Sanong Ekgasit
- Sensor Research Unit
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University 254 Phyathai Road
- Patumwan
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36
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Lee SJ, Kim YH, Kim JK, Baik H, Park JH, Lee J, Nam J, Park JH, Lee TW, Yi GR, Cho JH. A roll-to-roll welding process for planarized silver nanowire electrodes. NANOSCALE 2014; 6:11828-34. [PMID: 25169643 DOI: 10.1039/c4nr03771e] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We demonstrate continuous roll-to-roll production of highly conductive silver network films on a plastic substrate via mechanical and chemical welding processes. This process included three essential steps: (i) solvent spraying, (ii) roll compression, and (iii) salt treatment and washing. The sheet resistance of the resulting AgNW film was 5 Ω sq(-1) at 92% transmittance, which was the lowest sheet resistance and the highest transparency among the values reported previously for solution-processed AgNW electrodes. Moreover, the strong contacts among the AgNWs dramatically enhanced the mechanical stability of the network film. The resulting AgNW film was successfully applied to various organic electronic devices, such as organic field-effect transistors (OFETs), organic light-emitting diodes (OLEDs), and organic solar cells (OSCs).
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Affiliation(s)
- Seong Jun Lee
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Republic of Korea.
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37
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Marzun G, Streich C, Jendrzej S, Barcikowski S, Wagener P. Adsorption of colloidal platinum nanoparticles to supports: charge transfer and effects of electrostatic and steric interactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11928-11936. [PMID: 25226205 DOI: 10.1021/la502588g] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Adsorption of colloidal nanoparticles to surfaces and supports is a convenient approach to heterogeneous catalysts, polymer additives, or wastewater treatment. We investigated the adsorption efficiency of laser-generated and initially ligand-free platinum nanoparticles to TiO2 supports as a function of pH, ionic strength, and ligand surface coverage. The nanoparticle adsorption is dominantly controlled by electrostatic interactions: if the pH of the suspension is between the isoelectric point of the nanoparticles and the support, nanoparticles are adsorbed and transfer a net charge to the support. This charge-driven adsorption is not affected by steric repulsion due to various ligands attached to the nanoparticle surface. In addition to electrostatic interactions, colloidal stability given by moderate ionic strengths and pH values above the isoelectric point of nanoparticles are prerequisites for colloidal deposition.
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Affiliation(s)
- Galina Marzun
- Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CENIDE) and ‡NanoEnergieTechnikZentrum (NETZ), University of Duisburg-Essen , 45141 Essen, Germany
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38
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Facile and one-step synthesis of monodisperse silver nanoparticles using gum acacia in aqueous solution. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.03.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Lu L, Sevonkaev I, Kumar A, Goia DV. Strategies for tailoring the properties of chemically precipitated metal powders. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.04.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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40
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Hwang SH, Shin DH, Yun J, Kim C, Choi M, Jang J. SiO(2) /TiO(2) hollow nanoparticles decorated with Ag nanoparticles: enhanced visible light absorption and improved light scattering in dye-sensitized solar cells. Chemistry 2014; 20:4439-46. [PMID: 24591121 DOI: 10.1002/chem.201304522] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Indexed: 11/08/2022]
Abstract
Hollow SiO2 /TiO2 nanoparticles decorated with Ag nanoparticles (NPs) of controlled size (Ag@HNPs) were fabricated in order to enhance visible-light absorption and improve light scattering in dye-sensitized solar cells (DSSCs). They exhibited localized surface plasmon resonance (LSPR) and the LSPR effects were significantly influenced by the size of the Ag NPs. The absorption peak of the LSPR band dramatically increased with increasing Ag NP size. The LSPR of the large Ag NPs mainly increased the light absorption at short wavelengths, whereas the scattering from the SiO2 /TiO2 HNPs improved the light absorption at long wavelengths. This enabled the working electrode to use the full solar spectrum. Furthermore, the SiO2 layer thickness was adjusted to maximize the LSPR from the Ag NPs and avoid corrosion of the Ag NPs by the electrolyte. Importantly, the power conversion efficiency (PCE) increased from 7.1 % with purely TiO2 -based DSSCs to 8.1 % with HNP-based DSSCs, which is an approximately 12 % enhancement and can be attributed to greater light scattering. Furthermore, the PCEs of Ag@HNP-based DSSCs were 11 % higher (8.1 vs. 9.0 %) than the bare-HNP-based DSSCs, which can be attributed to LSPR. Together, the PCE of Ag@HNP-based DSSCs improved by a total of 27 %, from 7.1 to 9.0 %, due to these two effects. This comparative research will offer guidance in the design of multifunctional nanomaterials and the optimization of solar-cell performance.
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Affiliation(s)
- Sun Hye Hwang
- World Class University (WCU) Program of Chemical Convergence for Energy and Environment (C2E2), School of Chemical and Biological Engineering, College of Engineering, Seoul National University, Daehak-dong, Seoul 151-747 (Korea), Fax: (+82) 2-888-7295
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41
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Yang X, Lin S, Wiesner MR. Influence of natural organic matter on transport and retention of polymer coated silver nanoparticles in porous media. JOURNAL OF HAZARDOUS MATERIALS 2014; 264:161-168. [PMID: 24295767 DOI: 10.1016/j.jhazmat.2013.11.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 10/14/2013] [Accepted: 11/08/2013] [Indexed: 06/02/2023]
Abstract
Interactions between organic matter (OM) and engineered polymer coatings as they affect the retention of polyvinylpyrrolidone (PVP) polymer-coated silver nanoparticles (AgNPs) were studied. Two distinct types of OM-cysteine representing low molecular weight multivalent functional groups, and Suwannee River Humic Acid (HA) representing high molecular weight polymers, were investigated with respect to their effects on particle stability in aggregation and deposition. Aggregation of the PVP coated AgNPs (PVP-AgNPs) was enhanced by cysteine addition at high ionic strengths, which was attributed to cysteine binding to the AgNPs and replacing the otherwise steric stabilizing agent PVP. In contrast the addition of HA did not increase aggregation rates and decreased PVP-AgNP deposition to the silica porous medium, consistent with enhanced electrosteric stabilization by the HA. Although cysteine also reduced deposition in the porous medium, the mechanisms of reduced deposition appear to be enhanced electric double layer (EDL) interaction at low ionic strengths. At higher ionic strengths, aggregation was favored leading to lower deposition due to smaller diffusion coefficients and single collector efficiencies despite the reduced EDL interactions.
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Affiliation(s)
- Xinyao Yang
- Provincial Key Laboratory of Agricultural Environmental Engineering, College of Resources and Environment, Sichuan Agricultural University, No. 211, Huiming Road, Chengdu 611130, Sichuan, China; Department of Civil and Environmental Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, United States; Center for Environmental Implications of NanoTechnology (CEINT), Duke University, Durham, NC 27708, United States; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences (CAS), Nanjing 210008, Jiangsu, China.
| | - Shihong Lin
- Department of Civil and Environmental Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, United States; Center for Environmental Implications of NanoTechnology (CEINT), Duke University, Durham, NC 27708, United States
| | - Mark R Wiesner
- Department of Civil and Environmental Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, United States; Center for Environmental Implications of NanoTechnology (CEINT), Duke University, Durham, NC 27708, United States.
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42
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Chumachenko V, Kutsevol N, Rawiso M, Schmutz M, Blanck C. In situ formation of silver nanoparticles in linear and branched polyelectrolyte matrices using various reducing agents. NANOSCALE RESEARCH LETTERS 2014; 9:164. [PMID: 24708898 PMCID: PMC3996903 DOI: 10.1186/1556-276x-9-164] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 03/18/2014] [Indexed: 05/08/2023]
Abstract
Silver nanoparticles were synthesized in linear and branched polyelectrolyte matrices using different reductants and distinct synthesis conditions. The effect of the host hydrolyzed linear polyacrylamide and star-like copolymers dextran-graft-polyacrylamide of various compactness, the nature of the reductant, and temperature were studied on in situ synthesis of silver sols. The related nanosystems were analyzed by high-resolution transmission electron microscopy and UV-vis absorption spectrophotometry. It was established that the internal structure of the polymer matrix as well as the nature of the reductant determines the process of the silver nanoparticle formation. Specifically, the branched polymer matrices were much more efficient than the linear ones for stable nanosystem preparation.
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Affiliation(s)
- Vasyl Chumachenko
- Department of Chemistry, Kiev Taras Shevchenko National University, 60 Volodymyrska, Kiev UA-01033, Ukraine
| | - Nataliya Kutsevol
- Department of Chemistry, Kiev Taras Shevchenko National University, 60 Volodymyrska, Kiev UA-01033, Ukraine
| | - Michel Rawiso
- Institut Charles Sadron (CNRS-UdS), 23 rue du Loess-BP 84047, 67034 Strasbourg, Cedex 2, France
| | - Marc Schmutz
- Institut Charles Sadron (CNRS-UdS), 23 rue du Loess-BP 84047, 67034 Strasbourg, Cedex 2, France
| | - Christian Blanck
- Institut Charles Sadron (CNRS-UdS), 23 rue du Loess-BP 84047, 67034 Strasbourg, Cedex 2, France
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Tang Y, He W, Wang S, Tao Z, Cheng L. New insight into the size-controlled synthesis of silver nanoparticles and its superiority in room temperature sintering. CrystEngComm 2014. [DOI: 10.1039/c3ce42439a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silver nanoparticles with a controlled size present a high conductivity after room temperature sintering achieved by a chemical process.
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Affiliation(s)
- Yao Tang
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
| | - Wei He
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
| | - Shouxu Wang
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
| | - Zhihua Tao
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
| | - Lijuan Cheng
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
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Nymark P, Catalán J, Suhonen S, Järventaus H, Birkedal R, Clausen PA, Jensen KA, Vippola M, Savolainen K, Norppa H. Genotoxicity of polyvinylpyrrolidone-coated silver nanoparticles in BEAS 2B cells. Toxicology 2013; 313:38-48. [DOI: 10.1016/j.tox.2012.09.014] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Accepted: 09/28/2012] [Indexed: 01/10/2023]
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Hwang SH, Roh J, Jang J. Nanosilver-Decorated TiO2Nanofibers Coated with a SiO2Layer for Enhanced Light Scattering and Localized Surface Plasmons in Dye-Sensitized Solar Cells. Chemistry 2013; 19:13120-6. [DOI: 10.1002/chem.201301518] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Indexed: 11/07/2022]
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Wang F, Jakes JE, Geng D, Wang X. Spontaneous phase transformation and exfoliation of rectangular single-crystal zinc hydroxy dodecylsulfate nanomembranes. ACS NANO 2013; 7:6007-6016. [PMID: 23730895 DOI: 10.1021/nn4017108] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Free-standing two-dimensional (2D) nanostructures, exemplified by graphene and semiconductor nanomembranes, exhibit exotic electrical and mechanical properties and have great potential in electronic applications where devices need to be flexible or conformal to nonplanar surfaces. Based on our previous development of a substrate-free synthesis of large-area, free-standing zinc hydroxy dodecylsulfate (ZHDS) hexagonal nanomembranes, herein, we report a spontaneous phase transformation of ZHDS nanomembranes under extended reaction time. The hexagonal ZHDS sheets transformed into rectangular single crystal nanomembranes with sizes of hundreds of micrometers. They contain long-range-ordered zinc vacancies that can be fitted into an orthorhombic superlattice. A surplus of dodecylsulfate ions and a deficit of Zn(2+) diffusion near the water surface are believed to be the factors that drive the phase transformation. The phase transformation starts with the formation of zinc vacancies at the topmost layer of the hexagonal hillock, and propagates along the spiral growth path of the initial hexagonal sheets, which bears a great resemblance to the classic "periodic slip process". Mechanical property characterization of ZHDS nanomembranes by nanoindentation shows they behave much like structural polymers mechanically due to the incorporation of surfactant molecules. We also developed a one-step exfoliation and dehydration method that converts ZHDS nanomembranes to ZnO nanosheets using n-butylamine. This work provides a further understanding of the growth and stability of ZnO-based nanomembranes, as well as advisory insight for the further development on solution-based synthesis of free-standing, single-crystalline 2D nanostructures.
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Affiliation(s)
- Fei Wang
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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47
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Zhang Q, Yang Y, Li J, Iurilli R, Xie S, Qin D. Citrate-free synthesis of silver nanoplates and the mechanistic study. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6333-6345. [PMID: 23731248 DOI: 10.1021/am401374x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report a citrate-free synthesis of Ag nanoplates with an edge length of 50 nm that involved the reduction of AgNO3 by poly(vinyl pyrrolidone) (PVP) in ethanol at 80 °C under a solvothermal condition. Within a period of 4 h, greater than 99% of the initially added AgNO3 could be converted into Ag nanoplates with excellent stability. To understand this remarkably simple and efficient process, we systematically investigated the roles played by various reaction parameters, which include the type of precursor, reducing powers of PVP and ethanol, molar ratio of PVP to AgNO3, solvent, involvement of O2, and effects of pressure and temperature. Our results suggest a plausible mechanism that involves (i) fast reduction of AgNO3 to generate Ag multiple twinned particles (MTPs) via a thermodynamically controlled process, (ii) kinetically controlled formation of plate-like seeds and their further growth into small nanoplates in the presence of Ag(+) ions at a low concentration, and (iii) complete transfer of Ag atoms from the MPTs to nanoplates via O2-mediated Ostwald ripening. We demonstrated that the molar ratio of PVP to AgNO3 in ethanol plays an essential role in controlling the reduction rate for the formation of MTPs and plate-like seeds under the solvothermal condition, transformation kinetics, and final morphology taken by the Ag nanoplates. In particular, when the reaction temperatures were above the boiling point of ethanol, the pressure induced by a solvothermal process accelerated the oxidative etching of Ag MTPs to facilitate their complete conversion into nanoplates. The mechanistic insight could serve as a guideline to optimize the experimental parameters of a solvothermal synthesis to control the reduction kinetics and thus the formation of metallic nanocrystals with controlled shapes and in high yields and large quantities.
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Affiliation(s)
- Qiang Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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PVP-Stabilized Palladium Nanoparticles in Silica as Effective Catalysts for Hydrogenation Reactions. JOURNAL OF NANOTECHNOLOGY 2013. [DOI: 10.1155/2013/906740] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Palladium nanoparticles stabilized by poly (N-vinyl-2-pyrrolidone) (PVP) can be synthesized by corresponding Pd(acac)2(acac = acetylacetonate) as precursor in methanol at 80°C for 2 h followed by reduction with NaBH4and immobilized onto SiO2prepared by sol-gel process under acidic conditions (HF or HCl). The PVP/Pd molar ratio is set to 6. The effect of the sol-gel catalyst on the silica morphology and texture and on Pd(0) content was investigated. The catalysts prepared (ca.2% Pd(0)/SiO2/HF andca.0,3% Pd(0)/SiO2/HCl) were characterized by TEM, FAAS, and SEM-EDS. Palladium nanoparticles supported in silica with a size 6.6 ± 1.4 nm were obtained. The catalytic activity was tested in hydrogenation of alkenes.
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