Advancing the Photophysics of Carbon Nanotubes

技术支持：该项目涉及两个相关的研究领域：1）使用电子物理学探索单壁碳纳米管中的特定缺陷，以确定其作为激光激发能量和缺陷尺寸的函数的特定行为，以及2）涉及双壁碳纳米管（DWNTs）的相关研究，通过其实际应用的潜力，以及它们与双层石墨烯的概念关系;该方法集中于当给定（n，m）管是DWNT的组分时其行为与当其是单壁纳米管（SWNT）时其行为的比较。正在审查的基本问题是一个或两个石墨烯片的行为之间的差异，因为它们存在于它们的平面结构中，或者当它们卷起形成SWNT，DWNT或最终的多壁碳纳米管（MWNT）时。共振拉曼散射用于探测管曲率的影响以及管及其相邻管是半导体还是金属的影响。非技术性：该项目解决了材料科学和凝聚态物理与技术相关性的专题领域的基础研究问题，预计将为跨学科领域的研究生和本科生培训提供独特的机会。该项目还将产生更广泛的影响，通过培训这一研究领域的男女领导人，并由一位在世界范围内享有研究领导人声誉的PI女性榜样提供指导。PI将继续她的多种方法和活动，通过邀请普通观众的演讲，通过为美国政府提供咨询服务，向公众介绍纳米科学和纳米技术的进展（作为能源部氢技术咨询委员会的成员），工业实验室和专业协会（作为美国物理研究所董事会主席），并通过她的国家研究理事会2010年凝聚态物质和材料物理十年研究的共同主席。她将继续为许多大学的本科生和研究生提供指导。该项目由DMR电子材料和凝聚态物理计划共同支持。

Technical: This project addresses two related research areas: 1) use of photophysics to explore specific defects in single wall carbon nanotubes, to determine their specific behavior as a function of laser excitation energy and defect size, and 2) related research involving double wall carbon nanotubes (DWNTs) stimulated by their potential for practical applications, and by their conceptual relation to double layer graphene; the approach focuses on the behavior of a given (n,m) tube when it is the constituent of a DWNT as compared to its behavior when it is a single wall nanotube (SWNT). The fundamental issue under scrutiny is the difference between the behavior of one or two graphene sheets as they exist in their planar structure or when they are rolled up to form SWNT, DWNT or eventually multiwall carbon nanotubes (MWNTs). Resonance Raman scattering is utilized to probe the effect of tube curvature and the effect of whether a tube and its neighboring tubes are semiconducting or metallic. Non-technical: The project addresses basic research issues in a topical area of materials science and condensed matter physics with technological relevance, and is expected to provide unique opportunities for graduate and undergraduate training in an interdisciplinary field. The project is also expected to have broader impacts through the training of women and men leaders in this research field through mentorship by a female PI role model who has established a world wide reputation as a research leader. The PI will continue her multiple approaches and activities to describe advances in nanoscience and nanotechnology to the public through invited talks to general audiences, through advisory work for the US Government (as a member of the Hydrogen Technical Advisory Committee of the DOE), industrial laboratories and professional societies (as Chair of the Board of the American Institute of Physics), and through her co-chairmanship of the Decadal Study on Condensed Matter and Materials Physics 2010 of the National Research Council. Her service in holding mentoring sessions for undergrads and graduate students at numerous universities will continue. This project is co-supported by the DMR Electronic Materials and Condensed Matter Physics Programs.