检索结果-南通市图书馆

Enhanced piezoresistivity in Ni-silicone rubber composites

Chinese Physics B 2009年第2期18卷 652-657页

作者：常方高杨枫王少祥张娜宋桂林 College of Physics and information Engineering Henan Normal University

This paper reports that the nickel-silicone rubber composites with enhanced piezoresistivity were synthesized with much reduced nickel concentration. A large piezosensitivity of 0.716/kPa and a gauge factor of 600 have been obtained for a composite sample with filler-polymer ratio of 2.7：1 by weight. Measurements of resistance as a function of uniaxial force reveal that the piezoresistance arises predominantly from the internal heterogeneity of the material and the effect of geometrical changes of samples under pressure is negleetably small. The nonlinear current-voltage characteristic of the composite depends strongly on the filler content, the initial compression and the electrical current flowing in the sample. Ohmic behaviour has been observed only in the highly compressed samples. The breakdown strength decreases with increasing filler content of the composite. Both i - v and R - f characteristics indicates that the resistivity of the composites decreases with electrical field, suggesting that the composite may also be used to make voltage sensitive resistors for protecting circuits. All the experimental results favour a quantum tunnelling mechanism of conductivity. it finds that the concept ＇negative resistance＇, often used to describe the phenomena that current decreases with increasing voltage, is not appropriate and should be avoided.

关键词： piezoresistivity quantum tunnelling i - v characteristics voltage sensitive resistors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Current-voltage characteristics of an individual helical CdS nanowire rope

引用

Chinese Physics B 2008年第4期17卷 1389-1393页

作者：龙云泽王文龙白凤莲陈兆甲金爱子顾长志 College of Physics Science Qingdao University Beijing National Laboratory for Molecular Sciences Institute of ChemistryChinese Academy of Sciences Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences

This paper studies the electronic transport in an individual helically twisted CdS nanowire rope, on which platinum microleads are attached by focused-ion beam deposition. The current-voltage （i - v） characteristics are nonlinear from 300 down to 60 K. Some step-like structures in the i - v curves and oscillation peaks in the differential conductance （di/dv - v） curves have been observed even at room temperature. it proposes that the observed behaviour can be attributed to Coulomb-blockade transport in the one-dimensional CdS nanowires with diameters of 6-10 nm.

关键词： nanowires CdS i - v characteristics Coulomb blockade

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

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：