Coupling between Piezoelectricity and Charge Transport Property in ZnO Nanowires

ZnO 纳米线压电与电荷传输特性之间的耦合

• 批准号: 0905914
• 负责人: Xudong Wang
• 金额: $ 25.72万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0905914&HistoricalAwards=false
• 关键词: Coupling; between; Piezoelectricity; Charge; Transport; Coupling; between; Piezoelectricity; Charge; Transport

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Technical: The objective of this project is to study and understand fundamental phenomena underlying the interaction between the piezoelectric potential and charge transport behavior in ZnO one-dimensional nanostructures. The research aims to (1) correlate the intensity and distribution of piezoelectric potential in a ZnO nanowire with the size, strain and carrier density and to reveal the free charge screening effect on the piezoelectricity; (2) investigate how the carrier mobility is regulated by the piezoelectric field across a ZnO nanowire channel; (3) establish a general relationship between the carrier mobility and the nanowire's basic physical properties, including size, strain and carrier density. Zinc oxide nanowires with a rectangular cross section are synthesized and used for the piezoelectric and electric characterization. The research also plans to fabricate piezoelectricity-gated transistors using ZnO nanowires and to study these transistors in order to validate the theoretical framework established under this project. Non-technical: The project addresses basic research issues in a topical area of materials science with high technological relevance. The success of the research is expected to lay a foundation for applying piezoelectric semiconductor nanomaterials in advanced sensing and energy harvesting nanodevices. The research component of the project is integrated with the PI's new graduate course on Nanomaterials and Nanotechnology and an undergraduate course on Ceramics. The project also provides an excellent opportunity for training graduate and undergraduate students with fabrication and characterization technologies in the frontier of nanoscience.

该奖项是根据2009年的《美国复苏与再投资法》（公法111-5）进行资助的。技术：该项目的目的是研究和理解ZnO一维纳米结构中的压电潜力与电荷运输行为之间相互作用的基本现象。该研究的目的是（1）与ZnO纳米线中的压电电势的强度和分布相关，并具有大小，应变和载体密度，并揭示了对压电性的自由电荷筛选效果； （2）研究如何通过ZnO纳米线通道的压电场调节载流子迁移率； （3）建立载体迁移率与纳米线的基本物理特性（包括尺寸，应变和载体密度）之间的一般关系。合成具有矩形横截面的氧化锌纳米线，并用于压电和电特性。该研究还计划使用ZnO纳米线制造压电门控晶体管，并研究这些晶体管，以验证该项目下建立的理论框架。非技术性：该项目解决了具有高技术相关性的材料科学主题领域的基础研究问题。这项研究的成功有望为在高级感应和能量收集纳米版本中应用压电半导体纳米材料奠定基础。该项目的研究组成部分与PI的纳米材料和纳米技术的新研究生课程以及有关陶瓷的本科课程集成。该项目还为纳米科学边界的培训研究生和本科生提供了一个绝佳的机会。