CAREER: Lanthanide Chalcogenide Based Nanoparticles

无机、生物无机和有机金属化学项目的CAREER奖支持乔治城大学Sarah Stoll教授的研究工作，该研究旨在探索量子约束对半导体镧系纳米粒子中f价带和d价带之间能隙的物理性质的影响。该项目将寻求方法来生产一系列的镧离子配体覆盖纳米粒子，其中镧是镧系金属，E是一种硫。学生将研究在2+和3+之间的中间镧系氧化态范围内与尺寸有关的磁性。电池常数将通过x射线粉末测量来确定，以探测镧系元素的氧化状态。乔治敦大学将开发一个更以研究为导向的本科生实验课程，将为夏季本科生研究参与者构建一个有凝聚力的框架，并将努力通过ACS项目SEED让华盛顿特区的高中生接触到实验室经验。该项目将扩大纳米技术的科学基础。混合价镧系纳米粒子与盖层硫配体提供了机会，探索颗粒大小和固体性质之间的联系，如磁顺序和价。

This CAREER award in the Inorganic, Bioinorganic and Organometallic Chemistry program supports work by Professor Sarah Stoll at Georgetown University to explore the effect of quantum confinement on physical properties linked to the energy gap between valence f and d bands in semiconducting lanthanide nanoparticles. This project will seek methodology to produce a series of LnE ligand capped nanoparticles where Ln is a lanthanide metal and E is a chalcogen. Students will investigate size dependent magnetic properties over a range of intermediate lanthanide oxidation states between 2+ and 3+. Cell constants will be determined from X-ray powder measurements to probe the lanthanide oxidation state. A more research oriented undergraduate laboratory course will be developed at Georgetown, a cohesive framework for summer undergraduate research participants will be constructed, and efforts to expose high school students in the Washington, DC, metropolitan area to laboratory experiences through ACS Project SEED will be pursued.This project will expand the nanotechnology scientific base. Mixed valence lanthanide nanoparticles with capping chalcogen ligands offer opportunities to probe the linkage between particle size and solid state properties such as magnetic order and valency.