检索结果-内蒙古大学图书馆

One-pot fabrication of FePt/reduced graphene oxide composites as highly active and stable electrocatalysts for the oxygen reduction reaction

引用

Carbon 2014年 68卷 755-762页

作者： Dan Chen Xin Zhao Shanshan Chen Huifeng Li Xinning Fu Qingzhi Wu Shipu Li Yu Li Bao-Lian Su Rodney S. Ruoff State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Biomedical Material and Engineering Center Wuhan University of Technology Wuhan 430070 China Department of Mechanical Engineering and the Materials Science and Engineering Program The University of Texas at Austin 1 University Station C2200 Austin TX 78712 USA Laboratory of Inorganic Materials Chemistry University of Namur 61 rue de Bruxelles B-5000 Namur Belgium Clare Hall College University of Cambridge Cambridge UK

FePt nanoparticles (NPs)/reduced graphene oxide (rG-O) composites have been synthesized using a one-pot strategy without surfactants. Monodisperse FePt NPs were homogenously loaded onto rG-O sheets. By controlling the concentration of dispersed graphene oxide (GO), uniform FePt flower-like nanoclusters can be obtained. FePt/rG-O composites exhibited exceptionally high electrocatalytic performance in the activity and durability for the oxygen reduction reaction (ORR), much superior to that of the commercial Pt/C (60%). The straightforward synthesis of FePt/rG-O composites provides a low-cost and high performance catalyst for the ORR, which is also a promising strategy for the synthesis of various Pt-based bimetallic alloy/rG-O composites for potential uses in catalysis and energy fields.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Enhancing the sensitivity of needle-implantable electrochemical glucose sensors via surface rebuilding

引用

Journal of Diabetes science and technology 2013年第2期7卷 441-451页

作者： Vaddiraju, Santhisagar Legassey, Allen Qiang, Liangliang Wang, Yan Burgess, Diane J. Papadimitrakopoulos, Fotios Biorasis Inc. Technology Incubation Program University of Connecticut Storrs CT United States Polymer Program Institute of Material Science U-3136 University of Connecticut Storrs CT 06269 United States Department of Pharmaceutical Sciences University of Connecticut Storrs CT United States Department of Chemistry University of Connecticut Storrs CT United States

Objective: Needle-implantable sensors have shown to provide reliable continuous glucose monitoring for diabetes management. In order to reduce tissue injury during sensor implantation, there is a constant need for device size reduction, which imposes challenges in terms of sensitivity and reliability, as part of decreasing signal-tonoise and increasing layer complexity. Herein, we report sensitivity enhancement via electrochemical surface rebuilding of the working electrode (WE), which creates a three-dimensional nanoporous configuration with increased surface area. Methods: The gold WE was electrochemically rebuilt to render its surface nanoporous followed by decoration with platinum nanoparticles. The efficacy of such process was studied using sensor sensitivity against hydrogen peroxide (H₂O ₂). For glucose detection, the WE was further coated with five layers, namely, (1) polyphenol, (2) glucose oxidase, (3) polyurethane, (4) catalase, and (5) dexamethasone-releasing poly(vinyl alcohol)/poly(lactic-co- glycolic acid) composite. The amperometric response of the glucose sensor was noted in vitro and in vivo. Results: Scanning electron microscopy revealed that electrochemical rebuilding of the WE produced a nanoporous morphology that resulted in a 20-fold enhancement in H₂O₂ sensitivity, while retaining >98% selectivity. This afforded a 4-5-fold increase in overall glucose response of the glucose sensor when compared with a control sensor with no surface rebuilding and fittable only within an 18 G needle. The sensor was able to reproducibly track in vivo glycemic events, despite the large background currents typically encountered during animal testing. Conclusion: Enhanced sensor performance in terms of sensitivity and large signal-to-noise ratio has been attained via electrochemical rebuilding of the WE. This approach also bypasses the need for conventional and nanostructured mediators currently employed to enhance senso

关键词： Electrochemical Implantable glucose sensor Membranes Needle-implantable Sensitivity Surface etching

来源：评论

学校读者我要写书评

暂无评论

Tin (Sn) for enhancing performance in silicon CMOS

Tin (Sn) for enhancing performance in silicon CMOS

引用

IEEE Nanotechnology materials and Devices Conference (NMDC)

作者： Aftab M. Hussain Hossain M. Fahad Nirpendra Singh Galo A. Torres Sevilla Udo Schwingenschlögl Muhammad M. Hussain Integrated Nanotechnology Lab Electrical Engineering Program of King Abdullah University of Science and Technology Thuwal Saudi Arabia Material Science and Engineering Program of King Abdullah Universe of Science and Technology Thuwal Saudi Arabia

We study a group IV element: tin (Sn) by integrating it into silicon lattice, to enhance the performance of silicon CMOS. We have evaluated the electrical properties of the SiSn lattice by performing simulations using First-principle studies, followed by experimental device fabrication and characterization. We fabricated high-κ/metal gate based Metal-Oxide-Semiconductor capacitors (MOSCAPs) using SiSn as channel material to study the impact of Sn integration into silicon.

关键词： Silicon Three-dimensional displays Performance evaluation Logic gates Gold Switches Large scale integration

来源：评论

学校读者我要写书评

暂无评论

Selective enrichment and sensitive detection of candidate disease biomarker using a novel surfactant-coated magnetic nanoparticles

引用

IOP Conference Series: materials science and Engineering 2014年第1期64卷

作者： R Y Capangpangan M A C dela Rosa C H Chang W C Wang J Peng S J Shih M H Chiang D L Tzou C C Lin Y J Chen Department of Chemistry National Tsing Hua University Hsinchu Taiwan Molecular Science and Technology Taiwan International Graduate Program Taiwan contributed equally to this work Department of Chemistry National Taiwan University Taipei Taiwan Nanoscience and Technology Program Taiwan International Graduate Program Taiwan En Hou Polymer Chemical Ind. Co. Ltd. Taiwan Department of Material Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan Institute of Chemistry Academia Sinica Taipei Taiwan To whom any correspondence should be addressed

In this study, novel surfactant-coated magnetic nanoparticles were synthesized and evaluated for enrichment performance towards the sensitive detection of disease biomarkers. Surfactants with phosphate ester groups (RD35A and RD66) were used as a coating to reduce aggregation and to enhance the nanoparticle dispersion. Importantly, sensitive enrichment of the target proteins using the antibody-functionalized magnetic nanoparticles (Ab@MNP) was obtained, with a five-fold increase in recovery compared to uncoated magnetic nanoparticles. Similarly, phosphopeptide enrichment using the NTA@MNP in standard samples showed that the nanoparticles could selectively enrich phosphorylated peptides.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Solution-processed zinc oxide nanoparticles as interlayer materials for inverted organic solar cells

Solution-processed zinc oxide nanoparticles as interlayer ma...

引用

作者： Ibrahem, Mohammed Aziz Wei, Hung-Yu Tsai, Meng-Hung Ho, Kuo-Chuan Shyue, Jing-Jong Chu, Chih Wie Department of Physics National Taiwan University Taipei 106 Taiwan Research Center of Applied Science Academia Sinica Taipei 115 Taiwan Nanoscience and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Institute of Polymer Science and Engineering National Taiwan University Taipei 10617 Taiwan Department of Material Science and Engineering National Taiwan University Taipei 106 Taiwan Department of Photonics National Chiao Tung University Hsinchu 300 Taiwan

This paper describes inverted bulk heterojunction organic solar cells featuring solution-processed zinc oxide nanoparticles (ZnO NPs) as an electron extraction layer, prepared at relatively low annealing temperatures (≤150°C). A solution of ZnO NPs (average size: 25 nm) was prepared using a wet grinding method. When the ZnO interlayer was present in the solar cell, the vertical phase separation of the active layers prepared with and without solvent annealing exhibited similar gradient concentrations and, therefore, similar photocurrent generation, both of which were superior to those of conventional devices incorporating a poly(3,4-ethylenedioxythiophene): poly(styrene sulfonic acid) (PEDOT:PSS) hole extraction layer. We attribute this vertical phase separation to the similar surface energies of the fullerene derivative and the ZnO interlayer. Under simulated air mass (AM) 1.5 G illumination at 100 mW cm-2, the power conversion efficiency of the optimized device was approximately 4%. © 2012 Elsevier B.V.

关键词： Zinc oxide

来源：评论

学校读者我要写书评

暂无评论

Energy barriers for point-defect reactions in 3C-SiC

引用

Physical Review B 2013年第5期88卷 054105-054105页

作者： Ming-Jie Zheng Narasimhan Swaminathan Dane Morgan Izabela Szlufarska Materials Science and Engineering Department University of Wisconsin-Madison Madison Wisconsin USA Department of Mechanical Engineering Indian Institute of Technology Madras Chennai 600036 India Material Science Program University of Wisconsin-Madison Madison Wisconsin USA

Energy barriers of the key annealing reactions of neutral and charged point defects in SiC are calculated with ab initio density functional theory methods. In order to effectively search for the lowest energy migration paths the preliminary path is first established based on ab initio molecular dynamics (AIMD) simulations. The energy barrier of each hop is then calculated via climbing image nudged elastic band methods for paths guided by the AIMD simulations. The final paths and barriers are determined by comparing different pathways. The annealing reactions have important implications in understanding the amorphization, recovery, and other aspects of the radiation response of SiC. The results are compared with the literature data and experimental results on SiC recovery and amorphization. We propose that the C interstitial and Si antisite annealing reaction may provide a critical barrier that governs both the recovery stage III and amorphization processes.

关键词： SILICON carbide AB initio methods (Quantum mechanics) MOLECULAR dynamics AMORPHIZATION SIMULATED annealing (Mathematics)

来源：评论

学校读者我要写书评

暂无评论

Nanowires: Decoupling Diameter and Pitch in Silicon Nanowire Arrays Made by Metal‐Assisted Chemical Etching (Adv. Funct. Mater. 1/2014)

引用

Advanced Functional materials 2014年第1期24卷

作者： Junghoon Yeom Daniel Ratchford Christopher R. Field Todd H. Brintlinger Pehr E. Pehrsson National Research Council Research Associateship Program US Naval Research Laboratory Washington DC 20375 USA Chemistry Division US Naval Research Laboratory Washington DC 20375 USA Material Science & Technology Division US Naval Research Laboratory Washington DC 20375 USA

来源：评论

学校读者我要写书评

暂无评论

Tactile Feedback Display with Spatial and Temporal Resolutions (vol 3, 2521, 2013)

引用

SCIENTIFIC REPORTS 2013年第2013期3卷 2521-2521页

作者： Vishniakou, Siarhei Lewis, Brian W. Niu, Xiaofan Kargar, Alireza Sun, Ke Kalajian, Michael Park, Namseok Yang, Muchuan Jing, Yi Brochu, Paul Sun, Zhelin Li, Chun Truong Nguyen Pei, Qibing Wang, Deli Department of Electrical and Computer Engineering University of California - San Diego CA 92093 California Institute of Telecommunication and Information Technology University of California - San Diego CA 92093 Material Science Program University of California - San Diego CA 92093 Department of Material Science and Engineering University of California - Los Angeles CA 90095 These authors contributed equally to this work.

We report the electronic recording of the touch contact and pressure using an active matrix pressure sensor array made of transparent zinc oxide thin-film transistors and tactile feedback display using an array of diaphragm actuators made of an interpenetrating polymer elastomer network. Digital replay, editing and manipulation of the recorded touch events were demonstrated with both spatial and temporal resolutions. Analog reproduction of the force is also shown possible using the polymer actuators, despite of the high driving voltage. The ability to record, store, edit, and replay touch information adds an additional dimension to digital technologies and extends the capabilities of modern information exchange with the potential to revolutionize physical learning, social networking, e-commerce, robotics, gaming, medical and military applications.

关键词： ZINC oxide ACTUATORS POLYMERS SOCIAL networks PRESSURE transducers

来源：评论

学校读者我要写书评

暂无评论

Inside Cover: Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries (ChemElectroChem 12/2014)

引用

ChemElectroChem 2014年第12期1卷 2032-2032页

作者： Prof. Weidong He Xiaoning Wang Luhan Ye Yu Pan Yuanqiang Song Aifang Liu Wei Wang Hongping Zhang Hongxue Qi Ming Zhou Zhiguo Wang Kelvin H. L. Zhang James H. Dickerson School of Energy Science and Engineering University of Electronic Science and Technology (UESTC) Chengdu Sichuan 611731 (P. R. China) Interdisciplinary Program in Materials Science Vanderbilt University Nashville Tennessee 37234-0106 (USA) Vanderbilt Institute of Nanoscale Science and Engineering Vanderbilt University Nashville Tennessee 37234-0106 (USA) Shenzhen Key Laboratory for Advanced Materials Department Material Science and Engineering Shenzhen Graduate School Harbin Institute of Technology University Town Shenzhen 518055 (P. R. China) School of Materials Science and Engineering Southwest University of Science and Technology Mianyang Sichuan 621010 (P. R. China) Department of Chemistry The University of Hong Kong Pokfulam Road (Hong Kong) Department of Applied Physics University of Electronic Science and Technology of China Chengdu 610054 (P. R China) Department of Chemistry Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA (UK) Department of Physics Brown University Providence RI 02912 (USA)

来源：评论

学校读者我要写书评

暂无评论

Cyclic voltammetric study of Co-Ni-Fe alloys electrodeposition in sulfate medium

引用

AIP Conference Proceedings 2013年第1期1571卷

作者： I. Hanafi A. R. Daud S. Radiman Material Science Program School of Applied Physics Faculty of Science and Technology Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

Electrochemical technique has been used to study the electrodeposition of cobalt, nickel, iron and Co-Ni-Fe alloy on indium tin oxide (ITO) coated glass substrate. To obtain the nucleation mechanism, cyclic voltammetry is used to characterize the Co-Ni-Fe system. The scanning rate effect on the deposition process was investigated. Deposition of single metal occurs at potential values more positive than that estimated stability potential. Based on the cyclic voltammetry results, the electrodeposition of cobalt, nickel, iron and Co-Ni-Fe alloy clearly show that the process of diffusion occurs is controlled by the typical nucleation mechanism.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：