Femtosecond transient x-ray investigation of exciton and charge transfer dynamics in semiconductor nanostructures

半导体纳米结构中激子和电荷转移动力学的飞秒瞬态 X 射线研究

• 批准号: 1042013
• 负责人: Joshua Vura-Weis
• 金额: $ 20万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-15 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1042013&HistoricalAwards=false
• 关键词: Femtosecond; transient; ray; investigation; exciton

The Division of Chemistry supports Joshua Vura-Weis of the University of California - Berkeley as an American Competitiveness in Chemistry Fellow. Dr. Vura-Weis will use ultra-short (femtosecond) pulses of x-rays to probe the charge and exciting dynamics in semiconductor nanostructures. The femtosecond x-ray reflectivity experiments will be conducted in collaboration with Prof. Steve Leone. Nanomaterials will be made using the expertise and facilities of the Molecular Foundry at the Lawrence Berkeley National Laboratory. In addition, he will make steady-state x-ray measurements at the Advanced Light Source. For his plan for broadening participation, the PI will work to adapt curriculum materials developed for the SEPUP Program at the Lawrence Hall of Science for use by summer school students participating with the Breakthrough Collaborative -- a national consortium of 27 summer school programs for underserved but highly motivated students. Research like that of Dr. Vura-Weis is aimed at developing a better understanding of the ways in which a technologically important class of materials interacts with light. The hope is that this will lead to the development of superior materials for e.g. solar energy applications. The efforts at broadening participation being pursued by Dr. Vura-Weis are aimed at enabling the best and brightest young people to pursue careers in science.

化学部支持加州大学伯克利分校的约书亚乌拉-维斯作为美国化学竞争力研究员。 Vura-Weis博士将使用X射线的超短（飞秒）脉冲来探测半导体纳米结构中的电荷和激发动力学。 飞秒X射线反射率实验将与Steve Leone教授合作进行。 纳米材料将利用劳伦斯伯克利国家实验室分子铸造厂的专业知识和设施制造。 此外，他将在先进光源进行稳态X射线测量。 对于他扩大参与的计划，PI将努力调整为劳伦斯科学大厅的SEPUP项目开发的课程材料，供参加突破合作的暑期学校学生使用-这是一个由27个暑期学校项目组成的全国联盟，面向服务不足但积极性很高的学生。 像Vura-Weis博士这样的研究旨在更好地理解一类技术上重要的材料与光相互作用的方式。 希望这将导致开发用于例如太阳能应用的上级材料。 Vura-Weis博士为扩大参与所作的努力旨在使最优秀和最聪明的年轻人能够从事科学事业。