纳米科学与工程(英文)最新文献_第9页

Physical Properties of CrSb/InP(001): Effect of Interface in Half-Metallic CrSb/InP(001)的物理性质:半金属界面的影响

纳米科学与工程(英文) Pub Date : 2013-09-06 DOI: 10.4236/WJNSE.2013.33011

A. Boochani, S. Solymani, S. Rezaee, N. B. Nezafat, S. Tadayon, Amin Aminian

引用次数: 2

Comparison of Acidic and Polymeric Agents in Synthesis of TiO 2 Nanoparticles via a Modified Sol-Gel Method 改性溶胶-凝胶法制备二氧化钛纳米颗粒的酸性与聚合剂的比较

纳米科学与工程(英文) Pub Date : 2013-09-06 DOI: 10.4236/WJNSE.2013.33012

M. Karimipour

引用次数: 5

Experimental Investigation of Drilling Fluid Performance as Nanoparticles 纳米颗粒钻井液性能的实验研究

纳米科学与工程(英文) Pub Date : 2013-09-06 DOI: 10.4236/WJNSE.2013.33008

J. Nasser, A. Jesil, T. Mohiuddin, Majid Al Ruqeshi, G. Devi, Shahjahan Mohataram

{"title":"Experimental Investigation of Drilling Fluid Performance as Nanoparticles","authors":"J. Nasser, A. Jesil, T. Mohiuddin, Majid Al Ruqeshi, G. Devi, Shahjahan Mohataram","doi":"10.4236/WJNSE.2013.33008","DOIUrl":"https://doi.org/10.4236/WJNSE.2013.33008","url":null,"abstract":"In this work, a drilling fluid recipe has been developed by using nanoparticles, to increase the efficiency of drilling operations for maximum accessibility to new & matured oil reserves and suited to various drilling conditions. The solution to severe drilling problems like pipe sticking, lost circulation, formation damage, erosion of borehole, thermal instability of drilling fluids and insufficient gel properties of the drilling fluids, lies in controlling and optimizing the rheology of the drilling fluid. The inefficiency of the drilling fluid in performing certain functions is mainly due to a lack in a particular rheological property. The performance of the clay composites water-based bentonite drilling mud in terms of its rheological behavior in drilling systems was investigated at various pressures and temperatures. It was found that temperature had a detrimental effect on the rheological properties. The behavior was investigated using synthesized nano bentonite water based drilling fluid. The fluid retained all the desired rheological properties at elevated temperatures and pressures, thus enhanced the possibility of its application in deep wells, where elevated temperatures and pressures were quite common.","PeriodicalId":66816,"journal":{"name":"纳米科学与工程(英文)","volume":"2013 1","pages":"57-61"},"PeriodicalIF":0.0,"publicationDate":"2013-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70877405","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: 100

Size Variation of Gold Nanoparticles Synthesized Using Tannic Acid in Response to Higher Chloroauric Acid Concentrations 单宁酸合成金纳米颗粒粒径对高氯金酸浓度的响应

纳米科学与工程(英文) Pub Date : 2013-09-06 DOI: 10.4236/WJNSE.2013.33009

T. Ahmad, W. Khan

{"title":"Size Variation of Gold Nanoparticles Synthesized Using Tannic Acid in Response to Higher Chloroauric Acid Concentrations","authors":"T. Ahmad, W. Khan","doi":"10.4236/WJNSE.2013.33009","DOIUrl":"https://doi.org/10.4236/WJNSE.2013.33009","url":null,"abstract":"The size evolution of gold nanoparticles synthesized using tannic acid with initial gold chloride concentrations ranging from 0.2 - 2 mM at various tannic acid to chloroauric acid molar ratios (ranging from 2:1 to 12:1) has been analysed. Dynamic light scattering spectroscopic and tramission electron microscopic analyses were performed to assess the size of formed gold nanoparticles. Two different patterns of nanoparticle size evolution were obtained; the size evolution trend below 1 mM chloroauric acid concentration was found to be different from the one obtained at gold chloride concentrations higher than or equal to 1 mM. In case of sizes obtained for less than 1 mM gold chloride concentration, a general decrease in particle size was observed with increase in gold salt concentration. On the contrary, for the particles synthesised using chloroauric acid concentrations higher than or equal to 1 mM, with increase in gold salt concentration, a general increase in nanoparticle diameter was seen. For the molarities 0.2 and 0.5 mM, with increase in tannic acid/ chloroauric acid ratios, first the size decreases and then increases and finally reaches saturation. Particles formed at molarities greater than equal to 1 mM do not exhibit plateaux in their size rather initially decrease and then increase in response to increasing tannic acid/chloroauric acid ratios except for 2 mM concentration at which a small saturation is observed. The findings enumerate that higher gold chloride concentrations leave a significant impact on the sizes of gold nanaparticles obtained using tannic acid as a reducing agent of chloroauric acid solution.","PeriodicalId":66816,"journal":{"name":"纳米科学与工程(英文)","volume":"3 1","pages":"62-68"},"PeriodicalIF":0.0,"publicationDate":"2013-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70877475","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: 16

Evaluation of Energy Band Gap, Thermal Conductivity, Phase Transition Temperature and Elastic Response of PS/CdS Semiconducting Optical Nanocomposite PS/CdS半导体光学纳米复合材料的能带隙、热导率、相变温度和弹性响应评价

纳米科学与工程(英文) Pub Date : 2013-09-06 DOI: 10.4236/WJNSE.2013.33013

V. Mathur, K. Rathore, K. Sharma

{"title":"Evaluation of Energy Band Gap, Thermal Conductivity, Phase Transition Temperature and Elastic Response of PS/CdS Semiconducting Optical Nanocomposite","authors":"V. Mathur, K. Rathore, K. Sharma","doi":"10.4236/WJNSE.2013.33013","DOIUrl":"https://doi.org/10.4236/WJNSE.2013.33013","url":null,"abstract":"Thick film of Polystyrene (PS)/CdS semiconducting optical nanocomposite has been synthesized by dispersing nanofiller particles of CdS in PS matrix. The nanostructure of the CdS particles has been ascertained through X-ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). Small angle x-ray scattering analysis has been performed in order to ascertain nanocomposite character of the PS/CdS sample. Scanning Electron Microscopy (SEM) analyses of these samples have been carried out to establish the surface morphology. Optical Absorption Spectroscopy is used to measure the energy band gap of PS/CdS nanocomposite by using Tauc relation whereas Transient Plane Source Technique is used for the determination of thermal conductivity of the prepared samples. The phase transition temperature and elastic response of the prepared samples have been ascertained through Dynamic Mechanical Analyzer (DMA). This study reveals that the thermal conductivity, Young’s modulus and the toughness of the material are greatly influenced by the existence of interfacial energetic interaction between dispersed CdS nanofiller particles and matrix of PS.","PeriodicalId":66816,"journal":{"name":"纳米科学与工程(英文)","volume":"03 1","pages":"93-99"},"PeriodicalIF":0.0,"publicationDate":"2013-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70877708","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

Study of the Translocation and Distribution of Cadmium into Bean Plants (Phaseolus vulgaris) Using Labelled Cd-109 利用Cd-109标记技术研究镉在豆科植物(Phaseolus vulgaris)中的转运和分布

纳米科学与工程(英文) Pub Date : 2013-09-06 DOI: 10.4236/WJNSE.2013.33015

H. Benabid, M. Ghorab

引用次数: 4

Synthesis of a green nano-silica material using beneficiated waste dunites and its application in concrete 废砾石选矿合成绿色纳米二氧化硅材料及其在混凝土中的应用

纳米科学与工程(英文) Pub Date : 2013-09-06 DOI: 10.4236/WJNSE.2013.33006

A. Lazaro, G. Quercia, H. Brouwers, J. Geus

引用次数: 57

Optical and Mechanical Study of Mineral and Synthetic Nano Layered Silicate Reinforced Polyurethane Resin 矿物和合成纳米层状硅酸盐增强聚氨酯树脂的光学力学研究

纳米科学与工程(英文) Pub Date : 2013-06-18 DOI: 10.4236/WJNSE.2013.32004

B. Ahmadi, Ehsan R. Mafi, Tahereh Samaee Yekta, Iman R. Mafi, S. M. Kasiriha

引用次数: 2

Effect of Cr 3 C 2 and VC on the Mechanical and Structural Properties of Sintered WC-10wt%Co Nano Powders c3c_2和VC对烧结WC-10wt%Co纳米粉体力学和结构性能的影响

纳米科学与工程(英文) Pub Date : 2013-06-18 DOI: 10.4236/WJNSE.2013.32005

M. Mahmoodan, H. Aliakbarzadeh, F. Shahri

引用次数: 10

Threshold Voltage Sensitivity to Metal Gate Work-Function Based Performance Evaluation of Double-Gate n-FinFET Structures for LSTP Technology 基于金属栅极工作函数阈值电压敏感性的LSTP双栅n-FinFET结构性能评价

纳米科学与工程(英文) Pub Date : 2013-03-31 DOI: 10.4236/WJNSE.2013.31003

M. Mustafa, T. Bhat, M. R. Beigh

{"title":"Threshold Voltage Sensitivity to Metal Gate Work-Function Based Performance Evaluation of Double-Gate n-FinFET Structures for LSTP Technology","authors":"M. Mustafa, T. Bhat, M. R. Beigh","doi":"10.4236/WJNSE.2013.31003","DOIUrl":"https://doi.org/10.4236/WJNSE.2013.31003","url":null,"abstract":"This paper investigates the threshold voltage sensitivity to metal gate work-function for n-channel double gate fin field-effect transistor (FinFET) structures and evaluates the short channel performance of the device using threshold voltage dependence on metal gate work-function analysis. We carried out the study for a double gate n-channel fin field-effect transistor (n-FinFET) with parameters as per the projection report of International Technology Roadmap for Semiconductors, ITRS-2011 for low standby power (LSTP) 20 nm gate length technology node. In the present study device simulation have been carried out using PADRE simulator from MuGFET, which is based on the drift-diffusion theory. Our results show the accuracy and validity of classical drift-diffusion simulation results for transistor structures with lateral dimensions 10nm and above. The subthreshold behavior of device improves with increased metal gate work-function. The results also show that a higher gate work-function (≥5 eV) can fulfill the tolerable off-current as projected in ITRS 2011 report. The SCE in FinFET can reasonably be controlled and improved by proper adjustment of the metal gate work-function. DIBL is reduced with the increase in gate work function.","PeriodicalId":66816,"journal":{"name":"纳米科学与工程(英文)","volume":"2013 1","pages":"17-22"},"PeriodicalIF":0.0,"publicationDate":"2013-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70877435","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: 35