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Journal of Nanoparticles最新文献

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Dependence Properties of Sol-Gel Derived CuO@SiO2 Nanostructure to Diverse Concentrations of Copper Oxide 溶胶-凝胶衍生CuO@SiO2纳米结构对不同浓度氧化铜的依赖性
Journal of Nanoparticles Pub Date : 2013-09-19 DOI: 10.1155/2013/156813
V. Homaunmir, S. Tohidi, G. Grigorya, M. A. Z. Shirazi
{"title":"Dependence Properties of Sol-Gel Derived CuO@SiO2 Nanostructure to Diverse Concentrations of Copper Oxide","authors":"V. Homaunmir, S. Tohidi, G. Grigorya, M. A. Z. Shirazi","doi":"10.1155/2013/156813","DOIUrl":"https://doi.org/10.1155/2013/156813","url":null,"abstract":"Various concentrations of copper oxide were embedded into silica matrix of xerogel forms using copper source Cu(NO3)2·3H2O. The xerogel samples were prepared by hydrolysis and condensation of tetraethyl orthosilicate (TEOS) with determination of new molar ratios of the components by the sol-gel method. In this paper, three samples of copper oxide were doped into silica matrices using different concentrations. We obtained 10, 20, and 30 wt.% of copper oxide in silica matrices labeled as A, B, and C, respectively. The absorption and transmittance spectra of the gel matrices were treated at different concentrations by Uv-vis spectrophotometer. Quantities of water and transparency in the silica network change the spectral characteristics of Cu2","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"1 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2013-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79994389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Condensation Energy for a Two-Gap Superconducting State in Nanoparticles 纳米粒子中双间隙超导态的凝聚能
Journal of Nanoparticles Pub Date : 2013-09-04 DOI: 10.1155/2013/576232
S. Kruchinin, H. Kawabe, H. Nagao, Y. Nakazawa
{"title":"Condensation Energy for a Two-Gap Superconducting State in Nanoparticles","authors":"S. Kruchinin, H. Kawabe, H. Nagao, Y. Nakazawa","doi":"10.1155/2013/576232","DOIUrl":"https://doi.org/10.1155/2013/576232","url":null,"abstract":"Recent technology and experiments have fabricated high-quality superconducting MgB2 nanoparticles. \u0000We investigate properties of two-gap superconductivity in nanosized systems by using a \u0000two-sublevel model. In the present work, we analyze the results obtained for superconducting granules \u0000in the case of multiband superconductivity. We discuss the finite size effect in multiband \u0000superconductors. A definition of the critical level spacing of two-gap superconductivity is also presented, \u0000and we discuss the condensation energy and the parity gap of two-gap superconductivity \u0000in relation to the size dependence of those properties with two bulk gaps and the effective pair \u0000scattering process between two sublevels.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"11 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2013-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86491484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Nano/Microstructured Materials: Rapid, Low-Cost, and Eco-Friendly Synthesis Methods 纳米/微结构材料:快速、低成本和环保的合成方法
Journal of Nanoparticles Pub Date : 2013-07-24 DOI: 10.1155/2013/530170
A. Kajbafvala, Minghang Li, H. Bahmanpour, M. Maneshian, A. Kauffmann
{"title":"Nano/Microstructured Materials: Rapid, Low-Cost, and Eco-Friendly Synthesis Methods","authors":"A. Kajbafvala, Minghang Li, H. Bahmanpour, M. Maneshian, A. Kauffmann","doi":"10.1155/2013/530170","DOIUrl":"https://doi.org/10.1155/2013/530170","url":null,"abstract":"1 Department of Materials Science and Engineering, North Carolina State University, 911 Partners Way, Engineering Building I, Raleigh, NC 27695-7907, USA 2Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USA 3Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95616, USA 4Leibniz Institute for Solid State and Materials Research Dresden, P.O. Box 27 01 16, 01171 Dresden, Germany","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"8 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79587537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Green Synthesis of Nanocrystalline Cu2ZnSnS4 Powder Using Hydrothermal Route 水热法绿色合成纳米晶Cu2ZnSnS4粉末
Journal of Nanoparticles Pub Date : 2013-06-27 DOI: 10.1155/2013/685836
S. Verma, V. Agrawal, K. Jain, R. Pasricha, S. Chand
{"title":"Green Synthesis of Nanocrystalline Cu2ZnSnS4 Powder Using Hydrothermal Route","authors":"S. Verma, V. Agrawal, K. Jain, R. Pasricha, S. Chand","doi":"10.1155/2013/685836","DOIUrl":"https://doi.org/10.1155/2013/685836","url":null,"abstract":"Nanocrystalline Cu2ZnSnS4 (CZTS) powder was synthesized by a hydrothermal process, using thiourea as sulfur precursor. The powder was qualitatively analyzed using X-ray to identify the phase, and the size of the particles was determined using transmission electron microscopy (TEM). Raman peak at 337.5 cm−1 confirms the formation of pure CZTS particles. The powder was also synthesized solvothermally using ethylenediamine as solvent. The hydrothermally synthesized powder indicated the presence of the kesterite phase Cu2ZnSnS4 and particle size of about 4-5 nm. This environmentally green synthesis by hydrothermal route can produce gram scale synthesis of material with a chemical yield in excess of ~ 90%. UV Vis absorption spectra measurements indicated the band gap of as-synthesized CZTS nanoparticles to be 1.7 eV, which is near the optimum value for photovoltaic solar cell, showing its possible use in photovoltaics.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"61 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2013-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73938875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Charge Transfer in Nanocrystalline Semiconductor Electrodes 纳米晶半导体电极中的电荷转移
Journal of Nanoparticles Pub Date : 2013-05-25 DOI: 10.1155/2013/953153
M. Bouroushian
{"title":"Charge Transfer in Nanocrystalline Semiconductor Electrodes","authors":"M. Bouroushian","doi":"10.1155/2013/953153","DOIUrl":"https://doi.org/10.1155/2013/953153","url":null,"abstract":"Nanocrystalline electrodes in liquid junction devices possess a number of unique properties arising from their convoluted structure and the dimensions of their building units. The light-induced charge separation and transport in photoelectrochemical systems using nanocrystalline/nanoporous semiconductor electrodes is discussed here in connection with the basic principles of the (Schottky) barrier theory. Recent models for charge transfer kinetics in normal and unipolar (dye-sensitized) cells are reviewed, and novel concepts and materials are considered.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"53 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2013-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90838679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Effect of Nanoalumina on the Electrochemical and Mechanical Properties of Waterborne Polyurethane Composite Coatings 纳米氧化铝对水性聚氨酯复合涂料电化学性能和力学性能的影响
Journal of Nanoparticles Pub Date : 2013-05-20 DOI: 10.1155/2013/527432
S. Dhoke, Narayani Rajgopalan, A. Khanna
{"title":"Effect of Nanoalumina on the Electrochemical and Mechanical Properties of Waterborne Polyurethane Composite Coatings","authors":"S. Dhoke, Narayani Rajgopalan, A. Khanna","doi":"10.1155/2013/527432","DOIUrl":"https://doi.org/10.1155/2013/527432","url":null,"abstract":"A nanocomposite coating was formed by incorporating nanoalumina pigment in a waterborne polyurethane dispersion (WPUD) to different loading levels (0.1% and 1.0% by weight). Electrochemical performance of the nanocomposite coating was evaluated by applying these nanomodified coatings on mild steel substrate and exposing them to salt-spray, humidity, and accelerated UV weathering. The surface morphology of the composite coating was evaluated using various analytical techniques. SEM and AFM were used to investigate the dispersion of nanoalumina pigment and surface morphological changes of the nanomodified coating, before and after exposure to the test environment. Mechanical properties like scratch resistance were studied by using nanoscratch technique (Nanoindenter TI-900, Hysitron Inc, USA) and hardness using pencil hardness test method. The results showed an improvement in the corrosion, UV weathering, and mechanical properties of the coatings at lower concentration (0.1% by wt), indicating the positive effect of addition of nanoalumina pigment to the coating.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"344 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2013-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75463989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
The Impact of Nanochloroquine on Restoration of Hepatic and Splenic Mitochondrial Damage against Rodent Malaria 纳米氯喹对啮齿动物疟疾肝脾线粒体损伤修复的影响
Journal of Nanoparticles Pub Date : 2013-05-16 DOI: 10.1155/2013/106152
Satyajit Tripathy, Sabyasachi Das, S. Dash, S. Chattopadhyay, Somenath Roy
{"title":"The Impact of Nanochloroquine on Restoration of Hepatic and Splenic Mitochondrial Damage against Rodent Malaria","authors":"Satyajit Tripathy, Sabyasachi Das, S. Dash, S. Chattopadhyay, Somenath Roy","doi":"10.1155/2013/106152","DOIUrl":"https://doi.org/10.1155/2013/106152","url":null,"abstract":"The applications of nanotechnology to pharmacology are the potential appliance of biodegradable polymers and convection-enhanced drug delivery in the diagnostics and treatment of diseases. Chitosan is a natural polysaccharide that has attracted significant scientific interest during the last two decades. The present study was to evaluate the possible effects of chitosan tripolyphosphate conjugated nanochloroquine against Plasmodium berghei infection on select makers of oxidative damage and antioxidant status in mitochondria of liver and spleen. P. berghei infection was developed in Swiss mice by intraperitoneal injection of 200 µL of infected blood. Parasite-infected mice were treated with chloroquine and nanoconjugated chloroquine. Superoxide radical generation, nitrate level, and oxidized glutathione were increased significantly () in the mitochondria of infected group as compared to control group, and reduced glutathione level, activity of SOD, GPx, GR, and GST, and mitochondrial transmembrane potential were decreased significantly (), which were increased or decreased significantly () near to normal in nanoconjugated chloroquine treated group than chloroquine treated group. So, the findings may suggest the advantageous role of nanoconjugated chloroquine against the P. berghei induced oxidative damage in hepatic and splenic mitochondria.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"65 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2013-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81461727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Adiantum philippense L. Frond Assisted Rapid Green Synthesis of Gold and Silver Nanoparticles 金、银纳米颗粒的快速绿色合成
Journal of Nanoparticles Pub Date : 2013-05-16 DOI: 10.1155/2013/182320
D. Sant, Tejal Gujarathi, S. Harne, Sougata Ghosh, Rohini Kitture, S. Kale, B. Chopade, K. Pardesi
{"title":"Adiantum philippense L. Frond Assisted Rapid Green Synthesis of Gold and Silver Nanoparticles","authors":"D. Sant, Tejal Gujarathi, S. Harne, Sougata Ghosh, Rohini Kitture, S. Kale, B. Chopade, K. Pardesi","doi":"10.1155/2013/182320","DOIUrl":"https://doi.org/10.1155/2013/182320","url":null,"abstract":"Development of an ecofriendly, reliable, and rapid process for synthesis of nanoparticles using biological system is an important bulge in nanotechnology. Antioxidant potential and medicinal value of Adiantum philippense L. fascinated us to utilize it for biosynthesis of gold and silver nanoparticles (AuNPs and AgNPs). The current paper reports utility of aqueous extract of A. philippense L. fronds for the green synthesis of AuNPs and AgNPs. Effect of various parameters on synthesis of nanoparticles was monitored by UV-Vis spectrometry. Optimum conditions for AuNPs synthesis were 1 : 1 proportion of original extract at pH 11 and 5 mM tetrachloroauric acid, whereas optimum conditions for AgNPs synthesis were 1 : 1 proportion of original extract at pH 12 and 9 mM silver nitrate. Characterization of nanoparticles was done by TEM, SAED, XRD, EDS, FTIR, and DLS analyses. The results revealed that AuNPs and AgNPs were anisotropic. Monocrystalline AuNPs and polycrystalline AgNPs measured 10 to 18 nm in size. EDS and XRD analyses confirmed the presence of elemental gold and silver. FTIR analysis revealed a possible binding of extract to AuNPs through –NH2 group and to AgNPs through C=C group. These nanoparticles stabilized by a biological capping agent could further be utilized for biomedical applications.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"128 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2013-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83100092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 69
Antibacterial Activity of Silver Nanoparticles Synthesized by Bark Extract of Syzygium cumini 茴香树皮提取物合成纳米银的抗菌活性研究
Journal of Nanoparticles Pub Date : 2013-04-30 DOI: 10.1155/2013/431218
R. Prasad, V. Swamy
{"title":"Antibacterial Activity of Silver Nanoparticles Synthesized by Bark Extract of Syzygium cumini","authors":"R. Prasad, V. Swamy","doi":"10.1155/2013/431218","DOIUrl":"https://doi.org/10.1155/2013/431218","url":null,"abstract":"The unique property of the silver nanoparticles having the antimicrobial activity drags the major attention towards the present nanotechnology. The environmentally nontoxic, ecofriendly, and cost-effective method that has been developed for the synthesis of silver nanoparticles using plant extracts creates the major research interest in the field of nanobiotechnology. The synthesized silver nanoparticles have been characterized by the UV-visible spectroscopy, atomic force microscopy (AFM), and scanning electron microscopy (SEM). Further, the antibacterial activity of silver nanoparticles was evaluated by well diffusion method, and it was found that the biogenic silver nanoparticles have antibacterial activity against Escherichia coli (ATCC 25922), Staphylococcus aureus (ATCC 29213), Pseudomonas aeruginosa (ATCC 27853), Azotobacter chroococcum WR 9, and Bacillus licheniformis (MTCC 9555).","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"2013 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2013-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77841681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 127
Metal Oxide Sol-Gels (, AlO(OH), and ) to Improve the Mechanical Performance of Wood Substrates 金属氧化物溶胶-凝胶(，AlO(OH)，和)，以改善木材基材的机械性能
Journal of Nanoparticles Pub Date : 2013-04-29 DOI: 10.1155/2013/273204
V. Landry, P. Blanchet, G. Boivin
{"title":"Metal Oxide Sol-Gels (, AlO(OH), and ) to Improve the Mechanical Performance of Wood Substrates","authors":"V. Landry, P. Blanchet, G. Boivin","doi":"10.1155/2013/273204","DOIUrl":"https://doi.org/10.1155/2013/273204","url":null,"abstract":"Wood is a renewable material widely used in many applications due to its unique properties and distinctive look. However, as wood is organically constituted, it is slowly destroyed by the long-term impact of oxygen, UV radiations, water, and biological attacks (Mahltig et al., 2008). Therefore, protective treatments are necessary to improve the mechanical, thermal, and chemical properties of wood. In order to improve the mechanical properties of sugar maple (Acer saccharum Marsh.), as this species is widely used in the wood products industry, samples of sugar maple were impregnated with sols of metal oxides (AlO(OH), SiO2, and ZrO2). The weight gain and two different techniques of microscopy were used to evaluate the efficiency of the impregnation in the wood samples. The mechanical properties were evaluated using hardness test, scratch test, and impact test. It was shown that the maple samples impregnated with ZrO2 led to the greatest improvement of the mechanical properties.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"116 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2013-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89811156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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