Chemistry of Substrate-Aligned Carbon Nanotubes During and Following Growth

生长过程中和生长后基质定向碳纳米管的化学性质

• 批准号: 1213469
• 负责人: Jie Liu
• 金额: $ 49.5万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-15 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1213469&HistoricalAwards=false
• 关键词: Chemistry; Substrate; Aligned; Carbon; Nanotubes

This award from the Macromolecular, Supramolecular and Nanochemistry Program of the Division of Chemistry supports research by Professor Liu of Duke University on the growth mechanism of carbon nanotubes (CNTs). CNTs can be either metallic or semiconducting depending on their detailed molecular structures. The metallic and semiconducting nanotubes are suitable for very different applications. The growth of either pure metallic or semiconducting CNTs has been very challenging. Obtaining specific types (either metallic or semiconducting) of CNTs is critical for the realization of next-generation carbon nanotube-based nanoscale electronics. Over the last decade, significant efforts in research have been focused on selective growth of type-specific nanotubes but only limited progress has been made. Recently, there have been important breakthroughs in experimental observations, by the PIs and other research groups, that selective growth of semiconducting carbon nanotubes is possible. The underlying mechanism for such selective growth is still not clear and more experimental proofs and theoretical modeling is needed to complete and confirm the mechanism. This proposal will produce new knowledge on how to grow pure semiconducting carbon nanotubes suitable for electronic devices. In this proposed program, the PI will work closely with theoreticians to study the chemistry during and after the growth of carbon nanotubes. The researchers will study the differences between metallic and semiconducting nanotubes in terms of nucleation energy, growth rate, etc. Based on the experimental results, the researchers will build up deep understanding on the mechanism of the growth selectivity. The results from this research will enable wide range of carbon nanotube technological applications including nanoelectronics, bio- and chemical sensors. Students at all levels will be engaged in the project.

该奖项来自化学系的大分子，超分子和纳米化学计划，支持杜克大学的刘教授对碳纳米管（CNT）生长机制的研究。CNT可以是金属的或半导体的，这取决于它们的详细分子结构。金属和半导体纳米管适用于非常不同的应用。纯金属或半导体CNT的生长一直非常具有挑战性。获得特定类型（金属或半导体）的CNT对于实现下一代基于碳纳米管的纳米级电子器件至关重要。在过去的十年中，研究中的重大努力一直集中在选择性生长特定类型的纳米管，但只取得了有限的进展。最近，PI和其他研究小组在实验观察方面取得了重要突破，半导体碳纳米管的选择性生长是可能的。这种选择性生长的潜在机制仍然不清楚，需要更多的实验证据和理论模型来完成和确认该机制。这一提议将产生关于如何生长适用于电子器件的纯半导体碳纳米管的新知识。在这个计划中，PI将与理论家密切合作，研究碳纳米管生长过程中和生长后的化学反应。研究人员将研究金属和半导体纳米管在成核能，生长速率等方面的差异，根据实验结果，研究人员将建立对生长选择性机制的深刻理解。这项研究的结果将使碳纳米管技术的广泛应用，包括纳米电子学，生物和化学传感器。各级学生都将参与该项目。