矩形截面ZnO纳米线弯曲时的力-电-载流子耦合作用分析

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• 英文论文题名：Analysis on the electric-mechanical-charge carrier coupling in a rectangular cross-section ZnO nanowire under a bend mode
• 论文作者：崔之健 ; 张俊 ; 范帅棋 ; 胡元太
• 英文论文作者：CUI Zhi-jian ; ZHANG Jun ; FAN Shuai-qi ; HU Yuan-tai ; College of Petroleum Engineering ; Xi'an Shiyou University ; Department of Mechanics in Huazhong University of Science and Technology
• 年：2016
• 作者机构：西安石油大学石油工程学院;华中科技大学力学系;
• 论文关键词：ZnO纳米线 ; 力-电-载流子耦合 ; 压电势
• 英文论文关键词：ZnO nanowires ; electric-mechanical-charge carriers coupling ; piezoelectric potential
• 会议召开时间：2016-08-21
• 会议录名称：2016’中国西部声学学术交流会论文集
• 语种：中文
• 分类号：TN304.21;TB383.1
• 学会代码：SXJS
• 会议名称：2016’中国西部声学学术交流会
• 会议地点：中国四川成都
• 主办单位：中国声学学会微声学分会、中国声学学会物理声学分会、陕西省声学学会、浙江省声学学会、山东省声学学会、上海市声学学会、黑龙江省声学学会、水声技术重点实验室、重庆市声学学会、西安市声学学会、四川省声学学会
• 学会名称：《声学技术》编辑部
• 页数：4
• 文件大小：466k
• 原文格式：D
• 会议级别：全国

摘要

本文研究了矩形截面Zn O纳米线的横向弯曲问题,分析了弯曲过程中纳米线的力-电-载流子耦合作用。我们首先从基本方程出发,由本构关系、高斯定理、平衡方程推导出了纳米线内各阶压电势、载流子浓度、电场强度等物理量的表达式。然后通过数值计算分析了各物理量的分布规律。我们发现,横向弯曲的纳米线受拉一侧呈现为正电势,受压一侧为负电势。最后,文章分析了材料的掺杂浓度的影响,结果显示:掺杂浓度增加,纳米线横截面上下侧之间的压电势差减小,中性层处电位移幅值增加。
In this paper, the electric-mechanical-charge carrier coupling in a rectangular cross-section ZnO nanowire under bend deformations was studied. Those physical quantities such as the piezoelectric potential, carrier concentration and electric field intensity in the nanowire are derived from the constitutive relations, the Gauss law and the equilibrium equations. Numerical results show the distribution characteristics of a few physical quantities. It is found that the piezoelectric potential presents as positive at the stretched side of the nanowire and as negative at the contracted side. Effect of doping concentration is also discussed, and it is noted that increase in doping concentration will results in reduce in the piezoelectric potential difference between the two sides of the nanowire.

引文

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