Single-Walled Carbon Nanotubes Studied by Nuclear Magnetic Resonance

通过核磁共振研究单壁碳纳米管

• 批准号: 0139452
• 负责人: Yue Wu
• 金额: $ 32.02万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-03-01 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0139452&HistoricalAwards=false
• 关键词: Single; Walled; Carbon; Nanotubes; Studied

This research is focused on investigation of single-walled carbon nanotubes (SWNTs) using nuclear magnetic resonance (NMR). The one-dimensional structural characteristics of SWNTs could lead to novel correlated electronic states which is one of the most fundamental issues in condensed matter physics. NMR will be used to examine the correlation of electrons in SWNTs. The properties of SWNTs can be modified by Li and K intercalations and NMR will be used to investigate the intercalation mechanism and characterize changes of electronic properties. This could lead to new methods for tailoring the properties of SWNTs with applications including Li batteries. Finally, the accessibility of SWNTs by gas molecules and the characteristics of adsorption will be investigated. This study provides insight into the nano-confinement effects on nanofluids and could provide crucial information for the development of SWNT-based molecular sensors and filters. This research provides an excellent opportunity for students to acquire a broad knowledge and research capabilities including novel materials synthesis, state-of-the-art spectroscopy, fundamental physics, and applications suitable for a wide range of careers including in academe, industry, and government.This research is focused on investigation of single-walled carbon nanotube (SWNT), a seamless cylinder formed by wrapping a graphene sheet. The study aims at understanding the electronic properties, especially novel characteristics associated with the one-dimensional nature of the structure. Modifications of SWNT properties by lithium and potassium intercalations will also be explored with potential applications such as high-density lithium batteries. Trapping of ambient gas molecules inside the tubes of SWNTs will be studied. This could lead to sensitive molecular sensors and efficient gas filters. The main technique to be used is nuclear magnetic resonance, which provides detailed information on structures, molecular motion, and electronic properties. This research provides an excellent opportunity for students to acquire a broad knowledge and research capabilities including novel materials synthesis, state-of-the-art spectroscopy, fundamental physics, and applications suitable for a wide range of careers including in academe, industry, and government. It will also attract high school and undergraduate students to the exciting field of nanotechnology.

本研究以核磁共振法探讨单壁奈米碳管之结构。 单壁碳纳米管的一维结构特征可以导致新的关联电子态，这是凝聚态物理中最基本的问题之一。 NMR将用于检查单壁碳纳米管中电子的相关性。 锂和钾的插入可以改善单壁碳纳米管的性能，核磁共振将用于研究插入机制和表征电子性质的变化。 这可能会导致新的方法来定制单壁碳纳米管的性能与应用，包括锂电池。 最后，将研究气体分子对单壁碳纳米管的可及性和吸附特性。 这项研究提供了深入了解纳米流体的纳米约束效应，并可能为开发基于单壁碳纳米管的分子传感器和过滤器提供关键信息。 本研究为学生提供了一个良好的机会，以获得广泛的知识和研究能力，包括新材料合成，最先进的光谱学，基础物理学，并适用于广泛的职业生涯，包括工业，工业和政府。本研究的重点是单壁碳纳米管（SWNT）的研究，通过包裹石墨烯片形成的无缝圆柱体。 该研究旨在了解电子性质，特别是与结构的一维性质相关的新特性。 通过锂和钾的插入来改变单壁碳纳米管的性质也将被探索，具有潜在的应用，如高密度锂电池。 将研究单壁碳纳米管管内环境气体分子的捕获。 这可能导致敏感的分子传感器和有效的气体过滤器。 使用的主要技术是核磁共振，它提供了结构，分子运动和电子性质的详细信息。 这项研究为学生提供了一个很好的机会，获得广泛的知识和研究能力，包括新材料合成，最先进的光谱学，基础物理学，以及适用于各种职业的应用，包括工业，工业和政府。 它还将吸引高中和本科生到纳米技术的令人兴奋的领域。