Probe-Ion Laser Spectroscoy of Interfaces in Conventional and Nanocrystalline Metal Oxide Ceramics

这个教师早期职业发展（CAREER）项目，在分析和表面化学计划的支持下，专注于在传统和纳米晶陶瓷的晶界结构和缺陷化学的研究。 在为期三年的持续资助期间，弗吉尼亚理工学院州立大学的Tissue教授和他的学生将使用激光激发荧光（LIF）技术来解决这个问题。 稀土离子将被纳入陶瓷材料和这些局部探针，在材料合成过程中分离的接口，将使用LIF询问。 本研究的目的是（1）表征晶界的结构和缺陷化学，（2）确定探针离子光谱用于界面表征的实用性，以及（3）确定稀土离子在受限几何形状中的新光学性质。 此外，在此赠款期间，教授组织将追求一个教育计划，重点是化学超媒体的发展和评估的本科生在仪器分析和分析化学。 探测陶瓷氧化物材料中晶界和缺陷的结构和组成的能力在材料化学和加工中至关重要。 这个CAREER研究项目利用稀土激光诱导荧光技术开发了一种能够解决这一问题的分析技术。 这个CAREER项目的教育方面将在本科和研究生阶段的化学教学中引入最先进的信息技术。

This Faculty Early Career Development (CAREER) project, supported in the Analytical and Surface Chemistry Program, focusses on the study of structure and defect chemistry at grain boundaries in conventional and nanocrystalline ceramics. During the tenure of this three-year continuing grant, Professor Tissue and his students at Virginia Polytechnic Institute & State University will approach this problem using laser-excited fluorescence (LIF) techniques. Rare earth ions will be incorporated into ceramic materials and these local probes, which segregate at interfaces during materials synthesis, will be interrogated using LIF. The objectives of this research are (1) to characterize the structure and defect chemistry at grain boundaries, (2) to determine the utility of probe-ion spectroscopy for interface characterization, and (3) to identify novel optical properties of rare-earth ions in restricted geometries. Also during this grant period, Professor Tissue will pursue an education plan that focusses on the development and evaluation of chemistry hypermedia for undergraduate students in instrumental analysis and analytical chemistry. The ability to probe the structure and composition of grain boundaries and defects in ceramic oxide materials is of crucial importance in materials chemistry and processing. This CAREER research project utilizes rare-earth based laser induced fluorescence in the development of an enabling analytical technology with which to address this problem. The educational aspects of this CAREER project will give rise to the integration state-of-the-art information technology in the teaching of chemistry at the undergraduate and graduate levels.