Probing Van der Waals Coupled One-Dimensional Physics in Double-Walled Carbon Nanotubes

探索双壁碳纳米管中的范德华耦合一维物理

• 批准号: 1404865
• 负责人: Feng Wang
• 金额: $ 36万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1404865&HistoricalAwards=false
• 关键词: Probing; Van; der; Waals; Coupled

NONTECHNICAL ABSTRACTThe award funds a project that investigates novel one-dimensional(1D) physics in double-walled carbon nanotubes, a model family of van der Waals-coupled 1D materials. One-dimensional carbon nanotubes have remarkable electrical, mechanical, and optical properties. This research project aims at advancing fundamental understanding of these 1D carbon materials, the knowledge of which could enable new types of electronic and photonic devices. The project provides an interdisciplinary learning environment, where graduate and undergraduate students can learn state-of-the-art laser spectroscopy and nanoscale fabrication, and collaborate with theorists and other experimentalists internationally. The project also takes advantage of the diverse student body and education activities in UC Berkeley to enhance broad participation in science and technology. TECHNICAL ABSTRACTThis award funds a project that aims at fundamental understanding of van der Waals coupled one-dimensional physics in double-walled carbon nanotubes (DWNTs). DWNTs provides an ideal family of model systems to explore new 1D physics arising from van der Waals interactions: there are hundreds of different DWNT species, and each DWNT specie is uniquely characterized by the chiral indices of the constituent outer and inner single-walled carbon nanotubes. The perfect structure and rich variety of DWNTs is quite unique, and it enables quantitative and systematic studies of emerging 1D physics in different van der Waals-coupled structures. In this project, the principle investigator plans to investigate novel 1D phenomena in different DWNTs using a combination of single-tube spectroscopy and electron diffraction on individual DWNTs. In particular, the research activities cover three exciting directions: (1) Electronic structure renormalization in incommensurate DWNTs (2) Coupling between excitons and Luttinger liquid in metal/semiconductor DWNTs (i.e. DWNTs composed of a metallic outer wall and a semiconducting inner wall). (3) Ultrafast energy transfer between the inner- and outer-wall nanotubes. Physical understanding obtained in this project is not only of fundamental interest, but also important for nanoelectronic and nanophotonic applications based on DWNTs.

该奖项资助了一个研究双壁碳纳米管（范德华耦合一维材料的一个模型家族）中新颖的一维（1D）物理的项目。一维碳纳米管具有优异的电学、力学和光学性能。该研究项目旨在推进对这些一维碳材料的基本理解，这些知识可以使新型电子和光子器件成为可能。该项目提供了一个跨学科的学习环境，研究生和本科生可以学习最先进的激光光谱学和纳米级制造，并与国际理论家和其他实验学家合作。该项目还利用了加州大学伯克利分校多样化的学生群体和教育活动，以提高科学和技术的广泛参与。技术摘要：该奖项资助了一个旨在对双壁碳纳米管（DWNTs）中范德华耦合一维物理的基本理解的项目。DWNT提供了一个理想的模型系统家族，用于探索由范德华相互作用产生的新的一维物理：有数百种不同的DWNT物种，每种DWNT物种都具有组成外部和内部单壁碳纳米管的手性指数的独特特征。DWNTs完美的结构和丰富的种类是非常独特的，它可以定量和系统地研究不同范德华耦合结构下新兴的一维物理。在这个项目中，主要研究者计划使用单管光谱和电子衍射对单个DWNTs进行组合来研究不同DWNTs中的新型1D现象。特别是，研究活动涵盖了三个令人兴奋的方向：(1)不相称DWNTs中的电子结构重整化(2)金属/半导体DWNTs（即由金属外壁和半导体内壁组成的DWNTs）中激子与Luttinger液体的耦合。(3)内外壁纳米管之间的超快能量传递。在这个项目中获得的物理理解不仅是基础兴趣，而且对基于DWNTs的纳米电子和纳米光子应用也很重要。