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.

该奖项获得了化学系的大分子，超分子和纳米化学计划，该奖项支持杜克大学刘教授关于碳纳米管增长机制（CNTS）的研究。 CNT可以根据其详细的分子结构而成为金属或半导体。金属和半导体纳米管适合非常不同的应用。纯金属或半导体CNT的生长非常具有挑战性。获得CNT的特定类型（金属或半导体）对于实现下一代碳纳米管电子的纳米级电子至关重要。在过去的十年中，研究方面的重大努力集中在特定类型的纳米管的选择性增长上，但仅取得了有限的进展。最近，PIS和其他研究小组在实验观察中取得了重要突破，即半导体碳纳米管的选择性增长是可能的。这种选择性增长的基本机制仍然尚不清楚，并且需要更多的实验证明，并且需要理论建模来完成和确认机制。该提案将产生有关如何种植适合电子设备的纯半导体碳纳米管的新知识。在该提议的计划中，PI将与理论家紧密合作，以研究碳纳米管生长期间和之后的化学。研究人员将根据实验结果研究金属和半导体纳米管之间的差异，根据实验结果，研究人员将深入了解生长选择性的机制。这项研究的结果将使纳米管技术应用包括纳米电子，生物和化学传感器。各个级别的学生将参与该项目。