NER: Investigation of Electronic Transport in Carbon Nanotubes Using an Ultrafast Photoconduction Technique

NER：使用超快光电导技术研究碳纳米管中的电子传输

• 批准号: 0103227
• 负责人: David Janes
• 金额: $ 10万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0103227&HistoricalAwards=false
• 关键词: NER; Investigation; Electronic; Transport; Carbon

This proposal was received in response to NSE, NSF-0019. Carbon nanotubes are of interest as electronic conductors because of their unique properties, notably their behavior as 1-D conductors and their ballistic nature over several microns at room temperature. A general picture of electronic conduction in nanotubes is being developed by researchers in the field. Although the transient response of current flow is expected to be quite rapid (picosecond range), present experimental data for conduction properties of nanotubes is primarily obtained at low frequencies or in static measurements. In order to shed light on the fundamental current transport processes in nanotubes, an experimental and theoretical effort is proposed to develop characterization techniques which would allow the measurement of the transient current responses through nanotube conductors. This work will address two issues: i) the integration of nanotube conductors with appropriate high speed photoconductor materials and ii) the development of characterization techniques for nanoscale conductors based on pump/probe measurements using high speed pulsed laser systems. It is expected that the proposed work will shed light on the conduction processes of these interesting electronic materials and provide important capabilities for integration of these materials with other electronic materials, including semiconductor device structures.

该提案是针对NSE、NSF-0019而收到的。碳纳米管作为电子导体因其独特的性质而引起人们的兴趣，特别是它们作为一维导体的行为，以及它们在室温下超过几微米的弹道性质。该领域的研究人员正在开发纳米管中电子传导的概貌。虽然电流的瞬变响应被认为是相当快的(皮秒范围)，但目前关于纳米管导电性质的实验数据主要是在低频或静态测量中获得的。为了阐明纳米管中的基本电流传输过程，提出了一项实验和理论工作，以开发能够测量通过纳米管导体的暂态电流响应的表征技术。这项工作将解决两个问题：i)纳米管导体与适当的高速光导体材料的集成；ii)基于高速脉冲激光系统的泵浦/探测测量的纳米级导体表征技术的发展。预计这项拟议的工作将有助于揭示这些有趣的电子材料的导电过程，并为这些材料与包括半导体器件结构在内的其他电子材料的集成提供重要的能力。