Quantum Transport in Electrochemically Fabricated Metallic Nanoconstrictions

电化学制造的金属纳米收缩中的量子传输

• 批准号: 9818073
• 负责人: Nongjian Tao
• 金额: --
• 依托单位: Florida International University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-15 至 2001-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9818073&HistoricalAwards=false
• 关键词: Quantum; Transport; Electrochemically; Fabricated; Metallic

This research project, supported in the Analytical and Surface Chemistry Program, addresses the mechanism of quantized electron transport in small metallic structures. A novel electrochemical etching/deposition approach is used to control the size of metallic nanoconstrictions, while electron transport through the constriction is being measured. Professor Nongjian Tao and his coworkers at Florida International University are also investigating the effect of molecular adsorption on the surface of the nanoconstriction and the resulting changes in electron transport. This effect may be of use in the design of chemical sensors. Scanning probe microscopy is used to monitor the size of the metallic nanoconstriction formed and evaluated under electrochemical control.The flow of electrons through very small metallic conductors is governed by quantum mechanical effects. The ability to measure and understand this process is frustrated by the difficulty of preparing stable conductors of nanometer dimension. Using electrochemical control methods, this research project addresses this limitation, with the goal of providing fundamental understanding of the quantum transport process. The application of these ideas to the design of compact analytical sensors may result from this understanding.

该研究项目得到了分析和表面化学计划的支持，研究了小型金属结构中量子化电子传输的机制。 一种新颖的电化学蚀刻/沉积方法用于控制金属纳米收缩的尺寸，同时测量通过收缩的电子传输。 佛罗里达国际大学的陶农建教授和他的同事也在研究分子吸附对纳米收缩表面的影响以及由此产生的电子传输变化。 这种效应可用于化学传感器的设计。 扫描探针显微镜用于监测在电化学控制下形成和评估的金属纳米收缩的尺寸。电子通过非常小的金属导体的流动受到量子力学效应的控制。 由于难以制备纳米尺寸的稳定导体，测量和理解这一过程的能力受到阻碍。 该研究项目利用电化学控制方法解决了这一限制，目标是提供对量子传输过程的基本理解。 这些想法在紧凑型分析传感器的设计中的应用可能源于这种理解。