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Asian Journal of Pharmaceutical Sciences 2015年第2期10卷 138-145页

作者： Ponnusamy Manogaran Gopinath Ganesan Narchonai Dharumadurai Dhanasekaran Anandan Ranjani Nooruddin Thajuddin Department of Microbiology School of Life SciencesBharathidasan UniversityTiruchirappalli 620024India

Recently,biosynthesis of silver nanoparticles using bacteria,fungus and plants has emerged as a simple and viable alternative to more complex physical and chemical synthetic *** present investigation explains rapid and extracellular synthesis of silver nanoparticles using fungus Fusarium oxysporum NGD and characterization of the synthesized silver nanoparticles using UV-Vis spectroscopy,scanning electron microscopy,energy dispersive spectroscopy and X-ray diffraction *** size range of the synthesized silver nanoparticles was around 16.3e70 *** FTIR studies showed major peaks of proteins involved in the synthesis of silver ***,antibacterial effect of the silver nanoparticles against multidrug resistant pathogens Enterobacter *** 02[HM803168],Pseudomonas aeruginosa ANT 04[HM803170],Klebsiella pneumoniae ANT 03[HM803169]and Escherichia coli ANT 01[HM803167]was tested using turbidometric assay at 10,20,30,40 mg AgNPs/ml alone and in combination with ampicillin using agar well diffusion *** the resistant bacteria were found to be susceptible to the antibiotic in the presence of the silver nanoparticles.

关键词： Multidrug resistance silver nanoparticles Fusarium oxysporum AgNPs-Ampicillin complex Infertility

Preparation of Aluminum nanoparticles by Exploding Wire in Different Liquids

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Journal of Physical Science and Application 2016年第1期6卷 229-236页

作者： Hammad R. Humud Akeel M. Makia Ahmed S. Wasfi Department of Physics University of Baghdad Baghdad Iraq

The present work, provides a simple technique for the production of aluminum nanoparticles based on the explosion of thin aluminum wires in different liquids （distilled water, ethylene glycol and cyclohexane） by applying 36 Volte DC to two electrodes, one in the form of thin wire and the other in the form of plate and bring them to in touch mechanically. The nanoparticles are characterized by x-ray diffraction and UV-Visible spectroscopy. The x-ray diffraction results reveal that the nanoparticles continue to routine lattice periodicity at reduced particle sizes. The UV-Visible absorption spectrum of the liquid solution of the aluminum nanoparticles shows no characteristic Surface Plasmon Resonance （SPR） peak in the visible region. The TEM and SEM images show that the aluminum nanoparticles have narrow particle size distribution ranged from 20 to120 um with average particle size 80 nm. The aluminum nanoparticles prepared in water and that prepared in ethylene glycol show, no difference in their average particle size and distribution, while those prepared in cyclohexane show smaller sizes. It was observed that the particles have a little irregular shapes and low agglomerate was observed.

关键词： silver nanoparticles exploding wire plasma.

Comparative Study of Antibacterial Activity of Bacterial Cellulose/AgNPs Composites Prepared by Different Methods

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Journal of Donghua University(English Edition) 2017年第2期34卷 233-236页

作者：杨光洪特嘉谢健健 Key Laboratory of Science &Technology of Eco-Textile Ministry of Education Donghua University Shanghai 201620 China College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China

Bacterial cellulose(BC) is a type of nanoscale cellulose produced by *** this work,BC films were utilized as a template to in situ synthesize silver nanoparticles(AgNPs) by a variety of simple chemical strategies,including chemical reduction with NaBH4 or vitamin C,hydrothermal treatment and UV radiation.A comparative study of the formation of AgNPs such as the silver particle size and silver content,as well as the antibacterial activity of the BC-AgNPs nanocomposites by different preparation methods and reaction conditions was investigated.A beneficial support was provided for future applications of AgNPs contained BC composites with antibacterial properties.

关键词： bacterial cellulose(BC) silver nanoparticles template synthesis antibacterial activity

Preparation and Fluorescence Properties of Co-doped Nanocomposite Film Based on Supra Molecular Structure

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Chinese Journal of Chemical Physics 2006年第2期19卷 183-186页

作者：李贵安李貅宋建平李发荣马少华张玉荣方晓玲西安交通大学电子与信息工程学院西安710049 陕西师范大学物理学与信息技术学院西安710062

A novel materials design procedure based on the co-doping of metal nanoparticle and azo dye compound （MNPADC） is developed to improve the properties of functional molecules. The synthesized materials were characterized by transmission electron micrograph （TEM）, ultraviolet-visible absorption spectra （UV-Vis） and fluorescence spectra （FS）. It was found that the fluorescence intensity of methyl orange （MO） was enhanced by 5 times in the aqueous composite system doped with silver nanoparticles whereas it was reduced by 15% and 20% in composite films with co-mixing and coating structures, respectively. The results indicate that the properties of functional molecules can be greatly improved in composite film with supra molecular structure and that the procedure presented here is effective.

关键词： Supra molecular structure Nanocomposite film silver nanoparticles Methyl orange Fluorescence properties

In situ assembly of Ag nanoparticles（AgNPs） on porous silkworm cocoon-based would film:enhanced antimicrobial and wound healing activity

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In situ assembly of Ag nanoparticles（AgNPs） on porous silk...

Deposition and antibacterial properties of Ag nanoparticles on dopamine coated carbon nanotubes

中国蚕学会第九届青年学术研讨会

作者： Kun Yu Fei Lu Qing Li Honglei Chen Bitao Lu Jiawei Liu Zhiquan Li Fangying Dai Dayang Wu Guangqian Lan College of Textile and Garments Southwest University Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile The Ninth People’s Hospital of Chongqing

Preventing wound infection and retaining an appropriate level of moisture around wounds represent the most critical issues in wound *** these ends,special focus has been placed on Bombyx mori cocoons because the protective function of the silkworm cocoon resembles the manner in which the skin protects the human *** have designed a facile technique to develop a novel silkworm cocoon-based wound film（SCWF） wound dressing utilizing a CaCl2-ethanol-H2 O *** improve the anti-bacterial performance of SCWF,we have incorporated the ability of silk sericin to act as a reducing agent for the conversion of Ag+ to Ag,yielding nanoparticles（AgNPs） linked together by peptide bonds of silkworm cocoon wound film（SCWF-AgNPs）.SCWF-AgNP dressing exhibited excellent biocompatibility,anti-bacterial performance,and good ***,in vivo experiments indicated that SCWF-AgNP dressing was able to significantly accelerate the healing rate of infected wounds in New Zealand White rabbits and histological examination revealed that it aided in the successful reconstruction of intact and thickened epidermis during 14 days of healing of impaired wound *** results demonstrate that the present approach might shed new light on the design of anti-bacterial materials such as SCWF-AgNPs with promising applications in wound dressing.

关键词： Silkworm cocoon silver nanoparticles Infected wound healing Silk fibroin Antibacterial performance

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Deposition and antibacterial properties of Ag nanoparticles ...

装载自噬抑制剂的纳米银核介孔硅协同增强胶质瘤放疗

2014中国功能材料科技与产业高层论坛

作者： Dan Liu Wenchao Liu Hui Du Zhenqing Ma Hongfen Wang Jiadong Yang Shougang Chen Institute of Materials Science and Engineering Ocean University of China

In order to reduce the releasing rate of nanosilver in solutions,the carbon nanotube was selected to combine with *** higher dispersion of Ag nanoparticles（AgNPs）was in-situ prepared on the dopamine coated carbon nanotubes by a mild and environmentally friendly *** structure and nature of dopamine modified MWCNTs（PDA/MWCNTs）and silver nanoparticles/polydopamine/multi-walled carbon nanotubes composites（Ag/PDA/MWCNTs）were investigated with transmission electron microscopy（TEM）,Fourier transform infrared spectroscopy（FT-IR）,X-ray diffraction（XRD）and X-ray photoelectron spectroscopy（XPS）.Antimicrobial activity of hybrid material was investigated by the disk-diffusion test against Gram-negative *** synergistic effect of PDA and AgNPspromote the deposition of AgNPs,moreover,the suitable particle size of AgNPs（7 nm）can accelerate the approaching of AgNPs to the nuclearcontent of bacteria and they present greater surface area;therefore the resultant Ag/PDA/MWCNTs hybrid materials exhibited strongantibacterial property.

关键词： silver nanoparticles MWNT Dopamine Antibacterialproperty

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Science China Materials 2023年第7期66卷 2902-2912页

作者：吴昊袁月辉康世雄周高信谷越袁星怡李嘉婕顾宁 School of Biomedical Engineering and Informatics Nanjing Medical UniversityNanjing 211166China Medical School Nanjing UniversityNanjing 210093China

先前研究表明,银纳米颗粒可作为潜在的胶质瘤放疗的增敏剂,但这一作用受到自噬的限制.作为最有前途的药物递送载体之一,介孔二氧化硅纳米球由于其优异的药物负载性能、固有的生物相容性和可调节的孔径,对生物医学的发展做出了巨大贡献.... 详细信息

先前研究表明,银纳米颗粒可作为潜在的胶质瘤放疗的增敏剂,但这一作用受到自噬的限制.作为最有前途的药物递送载体之一,介孔二氧化硅纳米球由于其优异的药物负载性能、固有的生物相容性和可调节的孔径,对生物医学的发展做出了巨大贡献.在此,我们设计了一种负载自噬抑制剂3-甲基腺嘌呤的纳米银核介孔二氧化硅纳米球,其在体外和体内均表现出优异的协同抗癌作用.并且证实了抑制自噬可以进一步改善胶质瘤放疗的效果.此外,还从与氧化应激相关的核转录因子Nrf2的角度探讨了可能的机制,包括自噬抑制增强辐射诱导的氧化应激损伤以及Nrf2与自噬的相互作用.这项研究为将纳米银作为与自噬抑制剂结合用于胶质瘤放射增敏提供了一个愿景,并为其临床转化提供了一种可行的策略.

关键词： glioma radiotherapy autophagy mesoporous silica silver nanoparticles

Toxicity testing of four silver nanoparticle-coated dental castings in 3-D LO2 cell cultures

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2018年第2期19卷 159-167页

作者： Yi-ying ZHAO Qiang CHU Xu-er SHI Xiao-dong ZHENG Xiao-ting SHEN Yan-zhen ZHANG Department of Food Science and Nutrition Zhejiang Key Laboratory for Agro-Food ProcessingFuli Institute of Food Science Huajiachi Dental Center Stomatology Hospital Affiliated to Zhejiang University of Medicine Department of General Dentistry the Second Affiliated Hospital School of Medicine Zhejiang University

To address the controversial issue of the toxicity of dental alloys and silver nanoparticles in medical ap- plications, an in vivo-like LO2 3-D model was constructed within polyvinylidene fluoride hollow fiber materials to mimic the microenvironment of liver tissue. The use of microscopy methods and the measurement of liver-specific functions optimized the model for best cell performances and also proved the superiority of the 3-D LO2 model when compared with the traditional monolayer model. Toxicity tests were conducted using the newly constructed model, finding that four dental castings coated with silver nanoparticles were toxic to human hepatocytes after cell viability assays. In general, the toxicity of both the castings and the coated silver nanoparticles aggravated as time increased, yet the nanoparticles attenuated the general toxicity by preventing metal ion release, especially at high concentrations.

关键词： LO2 cell 3-D model silver nanoparticles Dental alloys Toxicity test

Wastewater treatment performance and microbial community structure in the constructed wetland under double-pressure of low temperature and Ag NPs exposure

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Journal of Southeast University(English Edition) 2022年第3期38卷 291-299页

作者： Huang Juan Cao Meifang Ma Yixuan Liu Jialiang Guan Wenzhu School of Civil Engineering Southeast UniversityNanjing 211189China

To investigate the effects of silver nanoparticles(Ag NPs)and low temperature double-pressure on the wastewater treatment efficacy and the microbial community structure of constructed wetlands,a pilot-scale vertical flow constructed wetland was set up to treat synthetic wastewater under laboratory *** measuring the effluent concentration of ammonia nitrogen(NH_(4)^(+)-N),total nitrogen(TN),total phosphorus(TP),chemical oxygen demand(COD),and the diversity,richness,and community structure of microorganisms of the upper and lower soil layers in the wetland,the nutrient removal effect of the constructed wetland and the changes in the microflora of the soil layer were *** results reveal that the correlation coefficients between the removal rates of TN and NH_(4)^(+)-N and the temperature are 0.463 and 0.692,respectively,indicating a significant positive *** the warm to the cold season,both the diversity and richness of microorganisms in the lower soil layer of wetlands are inhibited under the double-pressure of Ag NPs and low temperature,and the abundances of the denitrogenation functional bacteria such as Candidatus nitrososphaera,Sulfuritalea,Anaeromyxobacter,Candidatus solibacter,Nitrospira,and Zoogloea are *** temperature and Ag NPs exposure can thus affect the wastewater treatment performance of constructed wetlands,possibly because of the seasonal changes of the microflora.

关键词： silver nanoparticles constructed wetland wastewater treatment low temperature microbial community structure water quality

TiO_(2) nanorods based self-supported electrode of 1T/2H MoS_(2) nanosheets decorated by Ag nano-particles for efficient hydrogen evolution reaction

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Chinese Chemical Letters 2023年第11期34卷 355-359页

作者： Changzheng Lin Yunpeng Liu Yaxing Sun Zhenyu Wang Hao Xu Mingtao Li Jiangtao Feng Bo Hou Wei Yan Department of Environmental Science&Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Physics and Astronomy Cardiff UniversityThe ParadeCardiffCF243AAWalesUnited Kingdom State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China International Research Center for Renewable Energy(IRCRE) State Key Laboratory of Multiphase Flow in Power Engineering(MFPE)Xi’an Jiaotong UniversityXi’an 710049China

Molybdenum disulfide(MoS_(2))has shown significant promise as an economic hydrogen evolution reaction(HER)catalyst for hydrogen generation,but its catalytic performance is still lower than noble metalbased ***,a silver nanoparticles(Ag NPs)-decorated 1T/2H phase layered MoS_(2) electrocatalyst grown on titanium dioxide nanorod arrays(Ag NPs/1T(2H)MoS_(2)/TNRs)was prepared through acid-tunable ammonium ion *** advantage of MoS_(2) layered structure and crystal phase controllability,as-prepared Ag NPs/1T(2H)MoS_(2)/TNRs exhibited ultrahigh HER ***-proposed strategy combines facile hydrogen desorption(Ag NPs)with efficient hydrogen adsorption(1T/2H MoS_(2))effectively circumventes the kinetic limitation of hydrogen desorption by 1T/2H MoS_(2).The as-prepared Ag NPs/1T(2H)MoS_(2)/TNRs electrocatalyst exhibited excellent HER activity in 0.5 mol/L H2SO4 with low overpotential(118 mV *** hydrogen electrode(RHE))and small Tafel slope(38.61 mV/dec).The overpotential exhibts no obvious attenuation after 10 h of constant current ***-principles calculation demonstrates that as-prepared 1T/2H MoS_(2) exhibit a large capacity to store *** protons can be subsequently transferred to Ag NPs,which significantly increases the hydrogen coverage on the surface of Ag NPs in HER process and thus change the rate-determining step of HER on Ag NPs from water dissociation to hydrogen *** study provides a unique strategy to improve the catalytic activity and stability for MoS_(2)-based electrocatalyst.

关键词： Molybdenum disulfide silver nanoparticles Hydrogen evolution reaction Density functional theory Hydrogen spillover