Multifunctional Molecular Interfaces to Metal Oxide Surfaces

威斯康星大学麦迪逊分校的Robert Hamers教授得到了化学系分析和表面化学项目的支持，以研究使用分子层作为电子界面，以金红石和金红石形式定向TiO 2单晶，并扩展到其他氧化物，包括SrTiO 3。研究将主要集中在单晶上，但也会酌情使用纳米晶材料。这些研究旨在从根本上了解表面结构的差异如何影响所得分子层和界面的电子性质。将使用各种化学，结构，电子和光谱电化学探针的氧化物半导体的定义明确的单晶上的这些接枝层的结构和电子性质进行评估。氧化物半导体是几种新型染料敏化太阳能电池、量子点太阳能电池和半导体器件的基础。将这些材料与分子和纳米结构的敏化剂结合起来的能力可能会导致通过简单的湿化学方法制造廉价太阳能电池的发展。教育活动包括指导八年级学生进行可再生能源科学项目，为高中生提供暑期实习机会，为本科生和研究生提供全年研究机会。

Professor Robert Hamers of the University of Wisconsin-Madison is supported by the Analytical and Surface Chemistry Program in the Division of Chemistry to investigate the use of molecular layers as electronic interfaces to oriented single crystals of TiO2 in the anatase and rutile forms, and extending to other oxides including SrTiO3. Studies will focus primarily on single crystals but will also use nanocrystalline materials as appropriate. The studies are aimed at achieving a fundamental understanding of how differences in surface structure impact the resulting molecular layers and the electronic properties of the interfaces. The structural and electronic properties of these grafted layers on well-defined single crystals of oxide semiconductors will be evaluated using a variety of chemical, structural, electronic, and spectroelectrochemical probes. Oxide semiconductors are the basis for several new and emerging types of dye-sensitized solar cells, quantum dot solar cells, and photocatalysis devices. The ability to integrate these materials with molecular and nanostructured sensitizers could lead to the development of inexpensive solar cells made by simple wet-chemical methods. The educational activities include mentoring of 8th grade students on science projects in renewable energy, summer internships for high school students, and year-round research opportunities for undergraduates and graduate students.