CAREER: Mesoscopic Thermal and Thermoelectric Transport in Low Dimensional Materials

职业：低维材料中的介观热和热电传输

• 批准号: 0349232
• 负责人: Philip Kim
• 金额: $ 45万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0349232&HistoricalAwards=false
• 关键词: CAREER; Mesoscopic; Thermal; Thermoelectric; Transport

The goal of this Faculty Early Career Development (CAREER) project at Columbia University is to investigate mesoscopic thermal and thermoelectrical transport properties in nanoscale materials. In this research, innovative experimental techniques based on microfabrication, microelectromechanical systems techniques, and thermal imaging scanning probe microscopy will be employed to explore new physical phenomena in these materials at quantum transport limit. Specifically, electrical conductance, thermal conductance, and thermoelectric power will be measured in carbon nanotubes and various nanowires using specially designed submicron scale devices. This investigation will unveil the relationship between reversible and irreversible transport processes of quantum mechanics and thermodynamics at mesoscopic scales. In addition, the proposed research will help to search for thermoelectric applications of nanoscale materials in the quantum transport regime. The educational component of this proposal is intended to enhance synergetic effects in both research and education. In particular, an interactive physics demonstration laboratory for local high school science class with the aid of the web page based internet communications is planned. This activity is designed to foster interests of local underrepresented student group in science and technology.Although the electrical transport in nanometer scaled systems has been studied extensively, the investigation of the thermal and thermoelectric transport has received much less attention. The goal of this Faculty Early Career Development (CAREER) project at Columbia University is to explore new thermal transport and thermoelectric phenomena in low-dimensional materials, particularly when the quantum mechanical coherence length of the energy-carrying particles is comparable to the sample dimensions. This investigation will unveil the relationship between reversible and irreversible transport processes of quantum mechanics and thermodynamics in nanometer scaled materials. Furthermore, the unique thermoelectric properties of the low-dimensional nanometer scaled materials make them potential candidates for replacing century old technologies of refrigeration and electricity generation. This proposal seeks to find applications of these materials for thermoelectric cooling and generation, which lays the bases for a clean future energy technology using nanoscience. The educational component of this proposal emphasizes interactively integrated educational/research programs for local high school and undergraduate science education. The proposed internet based program will promote understanding of science among students, and also will help to encourage the participation of underrepresented groups in science and technology progress.

哥伦比亚大学教师早期职业发展（Career）项目的目标是研究纳米材料的介观热和热电输运特性。本研究将采用基于微加工技术、微机电系统技术和热成像扫描探针显微镜的创新实验技术，探索这些材料在量子输运极限下的新物理现象。具体来说，电导率、热传导率和热电功率将在碳纳米管和各种纳米线中使用专门设计的亚微米级设备进行测量。本研究将揭示介观尺度下量子力学和热力学可逆和不可逆输运过程之间的关系。此外，所提出的研究将有助于寻找纳米材料在量子输运机制中的热电应用。这项建议的教育部分旨在加强研究和教育的协同效应。特别规划了一个以网页为基础的网络通讯工具，为地方高中科学课提供互动式物理演示实验室。此活动旨在培养本地未被充分代表的学生群体对科技的兴趣。虽然纳米尺度系统中的电输运已经得到了广泛的研究，但对热输运和热电输运的研究却很少受到关注。哥伦比亚大学教师早期职业发展（Career）项目的目标是探索低维材料中的新热输运和热电现象，特别是当携带能量的粒子的量子力学相干长度与样品尺寸相当时。本研究将揭示纳米尺度材料中量子力学和热力学的可逆和不可逆输运过程之间的关系。此外，低维纳米尺度材料独特的热电特性使其成为取代百年旧制冷和发电技术的潜在候选材料。该提案旨在寻找这些材料在热电冷却和发电方面的应用，这为使用纳米科学的清洁未来能源技术奠定了基础。该提案的教育部分强调了当地高中和本科科学教育的交互式综合教育/研究项目。拟议的基于互联网的项目将促进学生对科学的理解，也将有助于鼓励未被充分代表的群体参与科学和技术进步。