CAREER: Nanoscale Chemistry in One Dimension

该项目将探索以下化学策略，用于纳米级构建模块的一般合成、组织和集成：(1)气相和溶液化学的发展，用于合成具有明确尺寸和宽高比的纳米线、纳米棒和分子线；(2)开发合适的化学功能化化学来实现这些1D构建块的自组装和集成；(3)研究了这些一维纳米结构的热稳定性和化学稳定性。本项目中三种类型的一维纳米级构件（纳米线、纳米棒和分子线）具有一维的共同结构特征，但在长度尺度、宽高比和刚度上存在差异，因此在装配行为和物理性能上也存在差异。该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和研究生课程的新方法。一维（1D）纳米结构具有重要的基础和技术意义。它们不仅表现出与低维和量子限制效应相关的有趣的电子和光学特性，而且它们也是纳米级器件应用的潜在关键组件。该项目将在纳米科学的重要领域培养学生，并在跨学科的环境中促进他们的科学发展。该领域被工业界视为高优先级，在纳米科学和技术领域接受培训的学生在就业市场上具有很强的竞争力，并为国家高度关注的领域做出重大贡献。本项目由材料研究部固态化学计划和化学部先进材料与加工计划资助。

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.