CAREER: Heat and Charge Transport in Metal-Molecule-Metal Junctions

职业：金属-分子-金属结中的热和电荷传输

• 批准号: 0844902
• 负责人: Pramod Sangi Reddy
• 金额: $ 40.31万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 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: 2009-05-01 至 2014-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0844902&HistoricalAwards=false
• 关键词: CAREER; Heat; Charge; Transport; Metal

0844902Sangi ReddyInorganic-organic molecular junctions formed by trapping organic molecules between inorganic electrodes are expected to have novel transport properties that are unlike that of organic materials or inorganic materials. Using inorganic-organic hybrid materials made of such junctions, it may be possible to develop cost-efficient thermoelectric and photovoltaic devices. However, to create these revolutionary technologies, it is essential to first understand the dependence of heat and charge transport properties of molecular junctions on: 1) the molecular structure of the organic molecule trapped between the electrodes, and 2) the chemical composition and resulting crystal structure of the electrodes. This proposal aims to understand this structure-property relationship by experimentally studying heat and charge transport in molecular junctions.Intellectual Merit: This program will provide new insights into the nature of heat and charge transport phenomena that occur in nanometer-sized molecular junctions due to the confinement of phonons and electrons in them. A novel technique that will enable the study of both heat and charge transport in molecular junctions will be developed in the proposed research program. Using this technique, experiments will be conducted on a variety of single molecule and multiple molecule junctions to elucidate, for the first time, the relationship between structure of the molecular junctions and its thermal conductance. Further, the effect of structure on the electrical conductance and thermopower of molecular junctions will be explored.Broader Impacts: This program includes the exploration of thermal transport in nanometer-sized molecular junctions potentially leading to the creation a new research area. The proposed work may impact the field of energy conversion; once the dependence of transport properties on structure is understood, it may be possible to tune the heat and charge transport in molecular junctions to create inexpensive and efficient thermoelectric materials using metal-molecule heterostructures. The educational and outreach activities of the proposed program will target students from diverse backgrounds at various educational levels. Underrepresented students from the African-American and Latino communities in the Ypsilanti public school district will be encouraged to study science and engineering by using educational modules designed to illustrate the exciting possibilities of nanoscience. As part of this program, a new two-semester graduate sequence will be introduced to teach engineers advanced concepts from quantum mechanics, solid-state physics, and statistical mechanics. This will enable them to pursue research in a variety of multi-disciplinary areas to solve important problems like renewable energy generation and efficient energy conversion and storage. This course will also be made available to the national and international community by collaborating with the NSF supported Nanohub, an online repository of coursework materials.

通过在无机电极之间捕获有机分子而形成的无机-有机分子结预期具有不同于有机材料或无机材料的新颖的传输性质。使用由这种结制成的无机-有机混合材料，有可能开发具有成本效益的热电和光伏器件。然而，为了创造这些革命性的技术，必须首先了解分子结的热和电荷传输特性对以下因素的依赖性：1）电极之间捕获的有机分子的分子结构，以及2）电极的化学组成和所得晶体结构。该项目旨在通过实验研究分子结中的热量和电荷传输来理解这种结构-性质关系。智力优势：该项目将为纳米尺寸的分子结中由于声子和电子的限制而发生的热量和电荷传输现象的本质提供新的见解。一种新的技术，这将使在分子结的热量和电荷传输的研究将在拟议的研究计划开发。使用这种技术，实验将进行各种单分子和多分子结阐明，第一次，分子结的结构和它的热导率之间的关系。此外，结构上的电导和分子结的热功率的影响将被explored.Broader影响：该计划包括在纳米尺寸的分子结可能导致创建一个新的研究领域的热传输的探索。拟议的工作可能会影响能量转换领域;一旦理解了传输特性对结构的依赖性，就有可能调整分子结中的热量和电荷传输，从而使用金属分子异质结构来创建廉价且高效的热电材料。拟议方案的教育和外联活动将针对不同教育水平的不同背景的学生。来自Ypsilanti公立学区的非裔美国人和拉丁裔社区的代表性不足的学生将被鼓励通过使用旨在说明纳米科学令人兴奋的可能性的教育模块来学习科学和工程。作为该计划的一部分，将引入一个新的两学期的研究生序列，以教授工程师量子力学，固态物理和统计力学的先进概念。这将使他们能够在各种多学科领域进行研究，以解决可再生能源发电和高效能源转换和储存等重要问题。这门课程也将提供给国家和国际社会通过与NSF支持的Nanohub，课程材料的在线存储库合作。