CAREER: Lanthanide Chalcogenide Based Nanoparticles

职业：基于稀土硫族化物的纳米颗粒

• 批准号: 0449829
• 负责人: Sarah Stoll
• 金额: --
• 依托单位: Georgetown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0449829&HistoricalAwards=false
• 关键词: CAREER; Lanthanide; Chalcogenide; Based; Nanoparticles

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.

这一无机化学、生物无机化学和金属有机化学项目的职业奖支持乔治城大学的Sarah Stoll教授的工作，她探索了量子限制对与半导体稀土纳米粒子中f和d价带之间的能隙有关的物理性质的影响。这个项目将寻求一种方法来生产一系列LNe配体覆盖的纳米颗粒，其中Ln是稀土金属，E是硫族金属。学生将研究在2+和3+之间的一系列中间稀土氧化态上与大小有关的磁性。晶胞常数将通过X射线粉末测量来确定，以探测镧系元素的氧化态。乔治敦大学将开设一门更注重研究的本科生实验室课程，为夏季本科生研究参与者建立一个紧密联系的框架，并将继续努力通过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。带有硫族配体的混合价稀土纳米颗粒提供了探索颗粒大小与固态性质(如磁序和价态)之间的联系的机会。