纳米粒子(英文)最新文献_第10页

Electromagnetic Analysis of Graphene Nanoparticles Operating in the TeraHertz Band 在太赫兹波段工作的石墨烯纳米颗粒的电磁分析

纳米粒子(英文) Pub Date : 2014-08-11 DOI: 10.4236/ANP.2014.33010

R. Iovine, R. Tarparelli, L. Vegni

引用次数: 4

Green Approach for In-Situ Growth of CdS Nanorods in Low Band Gap Polymer Network for Hybrid Solar Cell Applications 混合太阳能电池用低带隙聚合物网络原位生长CdS纳米棒的绿色方法

纳米粒子(英文) Pub Date : 2014-08-11 DOI: 10.4236/ANP.2014.33015

R. Bhardwaj, V. Bharti, Abhishek Sharma, D. Mohanty, V. Agrawal, N. Vats, G. Sharma, N. Chaudhary, Shilpa Jain, Jitender Gaur, Kamalika Banerjee, S. Chand

{"title":"Green Approach for In-Situ Growth of CdS Nanorods in Low Band Gap Polymer Network for Hybrid Solar Cell Applications","authors":"R. Bhardwaj, V. Bharti, Abhishek Sharma, D. Mohanty, V. Agrawal, N. Vats, G. Sharma, N. Chaudhary, Shilpa Jain, Jitender Gaur, Kamalika Banerjee, S. Chand","doi":"10.4236/ANP.2014.33015","DOIUrl":"https://doi.org/10.4236/ANP.2014.33015","url":null,"abstract":"In-situ growth of CdS nanorods (NRs) has been \u0000demonstrated via solvothermal, in a low band gap polymer, poly [[4,8-bis[(2-ethylhexyl)oxy] \u0000benzo [1,2-b:4,5-b’] dithiophene-2,6-diyl] [3-fluoro-2-[(2-ethylhexyl) carbonyl] \u0000thieno [3,4-b] thiophenediyl]] (PTB7). It is a high yielding, green approach as \u0000it removes use of volatile and hazardous chemicals such as pyridine as ligand \u0000which are conventionally used to synthesize precursors of CdS (NRs). Moreover \u0000the solvothermal process is a zero emission process being a close vessel \u0000synthesis and hence no material leaching into the atmosphere during the \u0000synthesis. The PTB7:CdS nanocomposite has been characterized by SEM, XRD, FTIR, \u0000UV-visible spectroscopy techniques. The photoluminescence (PL) spectroscopy \u0000study of PTB7 with CdS NRs has shown significant PL quenching by the \u0000incorporation of CdS NRs in PTB7; this shows that CdS NRs are efficient \u0000electron acceptors with the PTB7. The PTB7:CdS is used as active layer in the \u0000fabrication of hybrid solar cells (HSC) as donor-acceptor combination in the \u0000bulk heterojunction (BHJ) geometry. The HSCs fabricated using this active layer \u0000without any additional supporting fullerene based electron acceptor has given \u0000power conversion efficiency of above 1%.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4236/ANP.2014.33015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337197","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: 0

Importance of Double Layer Force between a Plat and a Nano-Particle in Restricting Fines Migration in Porous Media 平板与纳米颗粒之间的双层力在限制细颗粒在多孔介质中迁移中的重要性

纳米粒子(英文) Pub Date : 2014-08-11 DOI: 10.4236/ANP.2014.33014

S. Sourani, M. Afkhami, Y. Kazemzadeh, Houman Fallah

{"title":"Importance of Double Layer Force between a Plat and a Nano-Particle in Restricting Fines Migration in Porous Media","authors":"S. Sourani, M. Afkhami, Y. Kazemzadeh, Houman Fallah","doi":"10.4236/ANP.2014.33014","DOIUrl":"https://doi.org/10.4236/ANP.2014.33014","url":null,"abstract":"Fines migration is defined \u0000as separation of a Nano-sized particle by fluid flow in porous media and its \u0000migration along some distances and its entrapment in a narrow pore throat or \u0000its settlement on pore wall. Although this phenomenon happens in scales of Nano-meters, \u0000it can lead to sever irretrievable damages. This damage includes permeability \u0000reduction that causes drastic oil recovery reduction. There are several forces \u0000impacting a fine that is placed on a pore wall. Some of most important forces \u0000affecting settlement of a fine in porous media in presence of a fluid are electrical \u0000forces. Electrical forces consist of several long and short range forces. \u0000This study focuses on a long range force called Double Layer Force (DLF) that beside Van der \u0000Waals is one of most powerful electrical forces. DLF is a repulsive force that \u0000can repel a particle from pore wall and result separation of a Nano-sized solid \u0000which subsequently moves along with flowing fluid and clogs a throat. The DLF \u0000depends on the solid material (reservoir rock and fine) and fluid properties (i.e. ionic strength, pH). This study \u0000investigates how each of these parameters affects DLF and introduces proper \u0000conditions for reservoir water flooding for controlling fines migration.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337056","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

Extracellular Biosynthesis of AgNPs by the Bacterium Proteus mirabilis and Its Toxic Effect on Some Aspects of Animal Physiology 奇异变形杆菌胞外合成AgNPs及其对动物生理某些方面的毒性作用

纳米粒子(英文) Pub Date : 2014-08-11 DOI: 10.4236/ANP.2014.33012

M. Al-harbi, B. El-deeb, N. Mostafa, S. Amer

{"title":"Extracellular Biosynthesis of AgNPs by the Bacterium Proteus mirabilis and Its Toxic Effect on Some Aspects of Animal Physiology","authors":"M. Al-harbi, B. El-deeb, N. Mostafa, S. Amer","doi":"10.4236/ANP.2014.33012","DOIUrl":"https://doi.org/10.4236/ANP.2014.33012","url":null,"abstract":"The development of a \u0000reliable green chemistry process for the biogenic synthesis of nanomaterials is \u0000an important aspect of current nanotechnology research. Silver nanoparticles \u0000(AgNPs) have been used as antimicrobial and disinfectant agents. However, there \u0000is limited information about its toxicity. Therefore, this study focused on the \u0000biosynthesis of AgNPs by the bacterium Proteus mirabilis and on \u0000determining its preliminary toxic effect on some aspects of animal physiology. \u0000A green method for the synthesis of AgNPs using culture supernatant of Proteus \u0000mirabilis has been developed in this study and the synthesized AgNPs were \u0000characterized by several techniques. The AgNPs showed a maximum absorbance at \u0000445 nm on ultraviolet-visible spectra. The presence of proteins was identified \u0000by Fourier transform-infrared spectroscopy. The reduction of Ag+ to \u0000elemental silver was characterized by X-ray spectroscopy analysis. The \u0000transmission electron micrograph revealed the formation of polydispersed \u0000nanoparticles of 5 - 45 nm. The AgNPs were evaluated for their toxic effect on \u0000pregnant female albino rat. The result showed that liver enzymes (AST and ALP) \u0000were decreased significantly in the group treated with AgNPs. Mean corpuscular \u0000hemoglobin concentration also showed significant increase.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337212","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: 12

Structural and Magnetic Properties of Monophasic Maghemite (γ-Fe2O3) Nanocrystalline Powder 单相磁赤铁矿(γ-Fe2O3)纳米晶粉体的结构和磁性能

纳米粒子(英文) Pub Date : 2014-08-11 DOI: 10.4236/ANP.2014.33016

J. A. R. Guivar, Arturo I. Martínez, A. O. Anaya, L. Valladares, L. L. Félix, A. Domínguez

{"title":"Structural and Magnetic Properties of Monophasic Maghemite (γ-Fe2O3) Nanocrystalline Powder","authors":"J. A. R. Guivar, Arturo I. Martínez, A. O. Anaya, L. Valladares, L. L. Félix, A. Domínguez","doi":"10.4236/ANP.2014.33016","DOIUrl":"https://doi.org/10.4236/ANP.2014.33016","url":null,"abstract":"Structural and magnetic \u0000studies of monophasic maghemite (γ-Fe2O3) \u0000magnetic nanocrystallites (MNCs) synthesized by the co-precipitation chemical \u0000route are reported in this paper. For the synthesis, a starting precursor of \u0000magnetite (Fe3O4) \u0000in basic medium was oxidized at room temperature by adjusting the pH = 3.5 \u0000at 80°C in an acidic medium without surfactants. X-ray diffraction (XRD) \u0000pattern shows widened peaks indicating nanometric size and Rietveld Refinement confirms \u0000only one single-phase assigned to γ-Fe2O3 MNCs. High Resolution Transmission Electron Microscopy (HR-TEM) demonstrates \u0000the formation of nanoparticles with diameter around D ≈ 6.8 ± 0.1 nm which is in good agreement with Rietveld Refinement \u0000(6.4 ± 1 nm). A selected area electron diffraction pattern was carried out to \u0000complement the study of the crystalline structure of the γ-Fe2O3 MNCs. M(H) measurements taken \u0000at different temperatures show almost zero coercivity and remanence indicating \u0000superparamagnetic domain and high magnetic saturation.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337320","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: 61

Spectral Investigations of Hybrid Nanostructures Including Modified Fullerene C60 and Carbazole-Derivative Fluorophore 改性富勒烯C60和咔唑衍生物荧光团杂化纳米结构的光谱研究

纳米粒子(英文) Pub Date : 2014-08-11 DOI: 10.4236/ANP.2014.33011

E. P. Grebennikov, G. E. Adamov, V. Charushin, K. S. Levchenko, G. Rusinov, E. Zinoviev, R. Irgashev, P. S. Shmelin

引用次数: 0

Molecular Dynamic Study of Pull-In Instability of Nano-Switches 纳米开关拉入不稳定性的分子动力学研究

纳米粒子(英文) Pub Date : 2014-08-11 DOI: 10.4236/ANP.2014.33017

Sogand Hoshyarmanesh, M. Bahrami

引用次数: 3

In-Situ Impregnation of Copper Nanoparticles on Palm Empty Fruit Bunch Powder 铜纳米粒子在棕榈空果束粉上的原位浸渍

纳米粒子(英文) Pub Date : 2014-08-11 DOI: 10.4236/ANP.2014.33009

R. Ramli, M. R. Khan, R. Yunus, H. R. Ong, Rohaya Mohamed Halim, A. Aziz, Z. Ibrahim, N. Zainal

{"title":"In-Situ Impregnation of Copper Nanoparticles on Palm Empty Fruit Bunch Powder","authors":"R. Ramli, M. R. Khan, R. Yunus, H. R. Ong, Rohaya Mohamed Halim, A. Aziz, Z. Ibrahim, N. Zainal","doi":"10.4236/ANP.2014.33009","DOIUrl":"https://doi.org/10.4236/ANP.2014.33009","url":null,"abstract":"Copper nanoparticles were impregnated onto oil palm empty fruit bunch \u0000(EFB) powders via in-situ sol-gel \u0000method. The impregnation and interfacial interaction of copper nanoparticles \u0000with EFB were analysed by fourier transformed infrared spectroscopy (FTIR), \u0000X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), \u0000energy dispersive X-ray (EDX) and atomic force microscopy (AFM). The \u0000interaction of copper nanoparticles with the surface functional groups of EFB \u0000powders was identified by FTIR analysis. The peak shift of O-H and C-O \u0000functional groups indicated the interaction between EFB and copper \u0000nanoparticles. Besides that, XRD and EDX analysis confirmed the formation of copper \u0000nanoparticles on EFB powder. Due to the copper impregnation, the crystallinity \u0000of the EFB was increased as shown by XRD. The particles size of nanoparticles \u0000was analysed via TEM and AFM where the sizes were in the range of 60 - 100 nm. \u0000These findings strongly suggest that, copper nanoparticles impregnated EFB \u0000powders can be synthesized via in- situ sol gel method.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70336625","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: 19

Extracting the Atomic Coordinates and Connectivity of Zirconia Nanotubes from PDB Files for Modelling in ANSYS 从PDB文件中提取氧化锆纳米管的原子坐标和连通性用于ANSYS建模

纳米粒子(英文) Pub Date : 2014-08-11 DOI: 10.4236/ANP.2014.33013

Ibrahim Dauda Muhammad, M. Awang

引用次数: 4

Carbon Doped Nano-Crystalline TiO2 Photo-Active Thin Film for Solid State Photochemical Solar Cells 固体光化学太阳能电池用掺杂碳纳米晶TiO2光活性薄膜

纳米粒子(英文) Pub Date : 2014-05-28 DOI: 10.4236/ANP.2014.32008

Raymond Tichaona Taziwa, E. Meyer

引用次数: 17