CAREER: Structure-Topology-Property Correlations in Carbon Nanotubes

职业：碳纳米管的结构-拓扑-性质相关性

• 批准号: 9733028
• 负责人: Pulickel Ajayan
• 金额: $ 32.35万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-02-15 至 2002-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9733028&HistoricalAwards=false
• 关键词: CAREER; Structure; Topology; Property; Correlations

9733028 Ajayan The goals defined in this Faculty Early Career Development project are aimed at developing the knowledge base that is needed to predict physical properties of carbon nanotubes as a function of dimensions, structure, defects, and dopants. In-depth systematic experiments are planned to study in the following: 1) the effect of topological defects on structural symmetry, electronic structure and reactivity of nanotubes, 2) the effects of defect mobility in nanotubes during high temperature annealing and electron irradiation, 3) the effect of substitutional boron doping on the structure, topology and properties of nanotubes, 4) the effect of structure and topology of nanotubes on wetting and the formation of interfaces in nanotube-based nanocomposites, and 5) correlation of the information obtained on the structure and topology of carbon nanotubes to transport measurements. The studies will be carried out by spatially resolved characterization and measurement techniques on pure single-shell nanotubes, pure multi-shell nanotubes, doped nanotubes and nanotube-oxide layer composites. State of the art microscopy, spectroscopy, and four probe conductivity measurements will be done on isolated nanotubes for correlating structure, topology and properties. Some of the measurements will be pursued through industrial and international collaborations. The main thrust of the educational plan is to use innovative teaching methods to prepare students for a modern and technologically advanced society. Rensselaer Polytechnic Institute is at the forefront of undergraduate educational reform and in its commitment to introduce flexibility and innovation into the curriculum, most of the courses are being recast into interactive formats. The proposed educational activities reflect the synergy between the long term educational goals of the PI and the institutional a pproach to improving educational methods. A wide range of activities are planned achieve the educational goals: some of these include developing computer based structural models, demonstrations, short simulations and effective team problems for interactive courses, use of multi-media facilities in the classroom, developing modules for the nanomaterials course, involving undergraduates in key research projects, arranging formal and informal seminars to increase science awareness, encouraging industrial stays and international exchanges for students and promoting materials science and engineering as a viable career opportunity among secondary school students in the area. %%% The basic aim of this proposal is to study structure-topology-property correlation in carbon nanotubes. Carbon nanotubes represent the most striking example of how carbon structures can be tailored to exhibit a variety of useful properties by changing local symmetries and topology. Only six years after their discovery, the new knowledge available in the field indicates that nanotubes can be used in a range of applications, for example as nanoprobes and nanoscale electronic devices. It is expected that the comprehensive study proposed here will lead to better utilization of nanotube properties leading to the development of unique functional nanostructures. In addition, the PI will use innovative teaching methods to prepare students for a modern and technologically advanced society. ***

小行星9733028 在这个教师早期职业发展项目中定义的目标旨在开发预测碳纳米管物理特性所需的知识库， 尺寸、结构、缺陷和掺杂剂。 本文拟在以下几个方面进行深入系统的实验研究：1） 拓扑缺陷对纳米管结构对称性、电子结构和反应性的影响，2）高温退火和电子辐照对纳米管中缺陷迁移率的影响，3）替代型硼掺杂对纳米管结构、拓扑结构和性能的影响，4）纳米管的结构和拓扑结构对润湿和纳米管基纳米复合材料中界面形成的影响，以及5）将获得的关于碳纳米管的结构和拓扑结构的信息与传输测量相关联。 研究 将 被 携带 出来 通过 空间 纯单壳层纳米管、纯多壳层纳米管、掺杂纳米管的解析表征和测量技术 和纳米管-氧化物层复合物。 最先进的显微镜，光谱学和四探针电导率测量将在孤立的纳米管上进行，以关联结构，拓扑结构和性质。 一些测量将通过工业和国际合作进行。 教育计划的主旨是采用创新的教学方法，使学生为现代和技术先进的社会做好准备。伦斯勒理工学院处于本科教育改革的前沿， 为了使课程具有灵活性和创新性，大多数课程都将重新设计为互动形式。 拟议的教育活动反映了PI的长期教育目标与改进教育方法的机构方法之间的协同作用。 计划开展一系列广泛的活动，以实现教育目标： 其中一些 包括为互动课程发展电脑结构模型、示范、短期模拟及有效的小组问题，以及使用多媒体设施， 课堂，开发纳米材料课程模块，让本科生参与重点研究项目，安排正式和非正式研讨会以提高科学意识，鼓励学生留在工业和国际交流，并促进材料科学和工程作为中学生的可行职业机会，区 %%% 基本 目的 的 这 提案 是 到 碳结构-拓扑-性质相关性研究 纳米管。 碳纳米管代表了碳结构如何通过改变局部对称性和拓扑结构来表现出各种有用特性的最引人注目的例子。 发现后仅六年，该领域的新知识表明，纳米管可用于一系列应用，例如作为纳米探针和纳米级电子器件。 预计这里提出的全面研究将导致更好地利用纳米管的特性，从而开发独特的功能纳米结构。 此外，PI将使用创新的教学方法，为学生准备一个现代化和技术先进的社会。 ***