Structures and Dynamics at Interfaces

界面处的结构和动力学

• 批准号: 0549936
• 负责人: Ahmed Zewail
• 金额: $ 100万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-04-01 至 2010-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0549936&HistoricalAwards=false
• 关键词: Structures; Dynamics; Interfaces

In this award, funded by the Experimental Physical Chemistry Program of the Chemistry Division, Prof. Ahmed Zewail of the California Institute of Technology and his post-doctoral associates and graduate research students will continue their work on ultrafast (femtosecond-picosecond) electron diffraction (UED) and ultrafast electron crystallography (UEC) to study fundamental molecular processes -- both in the gas phase, as well as at interfaces. The principal advantage of this method is the fact that electrons interact strongly with all of the atoms in a material (no need for a chromophore or heavy atoms), and the dynamical information that is obtained directly gives the time-dependent structural information for an evolving system.Prof. Zewail and his group are developing a universal method for determining the rapid structural changes of dynamical chemical systems, by measuring the diffraction of short bursts of electrons. The ultimate aim of the research is to develop a means for determining the ultrafast structural evolution of any chemical, material or biomolecular system. The graduate students and post-doctoral researchers working on this project will gain unique experience that they will be able to apply to fields of chemistry, materials science, nanoscience, and biomolecular science.

该奖项由化学系实验物理化学计划资助，加州理工学院Ahmed Zewail教授和他的博士后同事以及研究生将继续他们在超快(飞秒-皮秒)电子衍射(UED)和超快电子结晶学(UEC)方面的工作，以研究气相和界面上的基本分子过程。这种方法的主要优点是电子与材料中的所有原子都有强烈的相互作用(不需要生色团或重原子)，而获得的动力学信息直接给出了一个演化系统的随时间变化的结构信息。Zewail和他的团队正在开发一种通用的方法，通过测量电子短爆发的衍射来确定动态化学系统的快速结构变化。这项研究的最终目的是开发一种方法来确定任何化学、材料或生物分子系统的超快结构演化。从事该项目的研究生和博士后研究人员将获得独特的经验，他们将能够应用于化学、材料科学、纳米科学和生物分子科学领域。