CAREER: Nanoscale Chemistry in One Dimension

本项目将探索用于一般合成、组织和集成纳米级构建块的以下化学策略：(1)开发气相和溶液相化学来合成具有明确尺寸和长宽比的纳米线、纳米棒和分子线；(2)开发适合于这些一维构建块自组装和集成的化学功能化化学；(3)研究这些一维纳米结构的热稳定性和化学稳定性。本项目中的三种一维纳米级构建块(纳米线、纳米棒和分子线)具有共同的结构特征-一维，但它们的长度比例、长宽比和刚度不同，因此它们的组装行为和物理性能也不同。这项研究的跨学科性质将使参与该项目的博士后研究人员、研究生和本科生受益。相关的教育活动将包括探索将材料化学研究引入本科生和研究生课程的新方法。%一维(1D)纳米结构具有基础性和技术性，它们不仅表现出与其低维和量子限制效应密切相关的有趣的电学和光学性质，而且也是潜在的纳米器件应用的关键部件。该项目将在纳米科学的重要领域培养学生，并促进他们在跨学科环境中的科学发展。这一领域被工业界视为高度优先事项，在这一纳米科学和技术领域接受培训的学生在就业市场上竞争非常激烈，并为国家高度关注的领域做出了重大贡献。该项目由材料研究部的固态化学计划和化学部的先进材料和加工计划资助。

This project will explore the following chemical strategies for the general synthesis, organization and integration of nanoscale building blocks: (1) the development of gas-phase and solution-phase chemistry for the synthesis of nanowires, nanorods and molecular wires with well-defined sizes and aspect ratios; (2) the development of suitable chemical functionalization chemistry for the self-assembly and integration of these 1D building blocks; (3) the investigation of the thermal and chemical stability of these 1D nanostructures. The three types of 1D nanoscale building blocks (nanowire, nanorod and molecular wire) in this project share common structural feature---one-dimensionality, but differ in their length scale, aspect ratio, and rigidity, conseuently also differ in their assembly behaviors and physical properties. The interdisciplinary nature of the research will benefit the postdoctoral researchers, graduate students and undergraduate students involved in the project. Associated educational activities will include exploring new means of introducing materials chemistry research into the curriculum for both undergraduate and graduate courses. %%%One-dimensional (1D) nanostructures are of both fundamental and technological interest.They not only exhibit interesting electronic and optical properties intrinsically associated with their low dimensionality and the quantum confinement effect, but they also are potentially the critical components in the nanoscale device applications. This project will train students in the important field of nanoscience and foster their scientific development in a cross-disciplinary environment. This area is viewed by industry as high priority, and students trained in this area of nanoscience and technology compete very well in the job market and make significant contributions to an area of high national interest. This project is funded by the Solid State Chemistry Program of the Division of Materials Research and the Advanced Materials and Processing Program of the Chemistry Division.