Near-Field Optical Spectroscopic Studies of Thin Film Materials

该学院早期职业发展（Career）项目由分析和表面化学项目支持，重点关注纳米长度领域有机和无机层的横向结构表征。在这项为期三年的持续资助期间，加州大学圣巴巴拉分校的Buratto教授和他的学生将利用近场扫描光学显微镜（NSOM）与已建立的光谱技术相结合，以纳米分辨率和单分子灵敏度探测薄膜光学和光电子材料的局部结构和动力学。本课程将探讨自组装单层及多层薄膜、导电及半导体聚合物薄膜及无机半导体量子结构的成分聚类、构象分析、分子排序及环境波动。这些系统中的载流子输运、扩散和俘获也将被表征。这些研究应该为局部化学和物理在这些材料性能中的作用提供有用的见解。此外，在此资助期间，Buratto教授将推行一项教育发展计划，包括在本科物理和分析化学课程中广泛引入激光光谱学，并为高级本科生和研究生开发非线性光学和显微镜新课程。在纳米尺度下表征光学和光电材料的能力对于理解这些技术上重要的系统的结构-性能关系至关重要。通过应用近场扫描光学显微镜和其他互补的光谱学技术，这个CAREER研究项目将导致对这些薄膜有机和无机材料的局部化学和物理的基本理解，以及对局部无序和材料性能之间关系的见解。这个CAREER项目的教育发展方面将丰富加州大学圣巴巴拉分校本科生和研究生可用的物理和分析化学课程。

This Faculty Early Career Development (CAREER) project, supported in the Analytical and Surface Chemistry Program, focusses on the lateral structural characterization of organic and inorganic layers in the nanometer length domain. During the tenure of this three- year continuing grant, Professor Buratto and his students at the University of California - Santa Barbara will utilize near-field scanning optical microscopy (NSOM) in conjunction with established spectroscopic techniques to probe the local structure and dynamics of thin-film optical and opto-electronic materials with nanometer resolution and single molecule sensitivity. Component clustering, conformational analysis, molecular ordering, and environment fluctuations of self-assembled monolayer and multilayer films, conducting and semiconducting polymer films, and inorganic semiconductor quantum structures will be examined. Charge carrier transport, diffusion, and trapping in these systems will also be characterized. These studies should provide useful insights into the role of localized chemistry and physics in the performance of these materials. Also during this grant period, Professor Buratto will pursue an educational development plan that includes the broad introduction of laser spectroscopy in undergraduate physical and analytical chemistry courses, and the development of new courses in nonlinear optics and microscopy for advanced undergraduate and graduate students. The ability to characterize optical and opto-electronic materials in the nanoscale regime is essential to understanding the structure-performance relationships of these technologically important systems. Through application of near-field scanning optical microscopy and other complementary optical spectroscopic techniques, this CAREER research project will lead to a fundamental understanding of the local chemistry and physics of these thin-film organic and inorganic materials, as well as insights into relationships between local ord er/disorder and materials performance. The educational development aspects of this CAREER project will enrich the physical and analytical chemistry curriculum available to undergraduate and graduate students at the University of California - Santa Barbara.