CAREER: Electronic and Mechanical Properties of Single Metal-Molecule-Metal Junctions

职业：单金属-分子-金属结的电子和机械性能

• 批准号: 0744185
• 负责人: Latha Venkataraman
• 金额: $ 60万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0744185&HistoricalAwards=false
• 关键词: CAREER; Electronic; Mechanical; Properties; Single

In this project funded by the Experimental Physical Chemistry Program of the Chemistry Division, Professor Latha Venkataraman of Columbia University will seek to reveal and understand properties of single molecules attached to metal electrodes while educating students about the interplay of physics, chemistry and engineering at the nanoscale. The size of components in the integrated circuit industry is fast approaching the nanometer scale, requiring a detailed understanding of the fundamental properties at the single molecule level. Specifically, this work proposes to develop and build a high-resolution single-axis conducting atomic force microscope to simultaneously measure the rate at which electrons are transferred across a single molecule junction, as well as the forces required to break the junction apart. Electronic properties, such as junction resistance and current-voltage characteristics, are related to intrinsic junction properties including molecular length, conformation and the alignment of the molecular orbitals with the metal Fermi level. Measurements of forces reveal bond strengths, binding energies and junction stability, properties which cannot be probed directly by electrical measurements. The research proposed here will explore both of these related but different aspects of single-molecule circuits. An integral part of the proposed activity is to introduce nanoscience to high school, undergraduate and graduate students, aiming to recruit them to pursue careers in science. In addition, a new Nanotechnology course for senior undergraduate and graduate students will be developed which will integrate a wide range of topics, from the synthesis of nanoscale materials to their charge transport properties and incorporation into electronic devices.

在这个由化学系实验物理化学计划资助的项目中，哥伦比亚大学的Latha Venkataraman教授将寻求揭示和理解附着在金属电极上的单分子的性质，同时教育学生关于纳米级物理，化学和工程的相互作用。集成电路工业中的元件尺寸正在快速接近纳米尺度，这需要在单分子水平上详细了解其基本特性。具体来说，这项工作提出开发和建立一个高分辨率的单轴导电原子力显微镜，以同时测量电子在单个分子结上转移的速率，以及打破结所需的力。电子性质，如结电阻和电流-电压特性，与本征结性质有关，包括分子长度，构象和分子轨道与金属费米能级的对齐。力的测量揭示了结合强度、结合能和结的稳定性，这些性质不能通过电测量直接探测。这里提出的研究将探索单分子电路的这两个相关但不同的方面。拟议活动的一个组成部分是向高中生、本科生和研究生介绍纳米科学，旨在招募他们从事科学事业。 此外，将为高年级本科生和研究生开发一门新的纳米技术课程，该课程将整合广泛的主题，从纳米材料的合成到其电荷传输特性并纳入电子设备。