Structures and Dynamics at Interfaces

在这个由化学系实验物理化学计划资助的奖项中，加州理工学院的Ahmed Zewail教授及其博士后同事和研究生将继续他们在超快（飞秒-皮秒）电子衍射（UED）和超快电子晶体学（UEC）方面的工作，以研究气相和界面的基本分子过程。 这种方法的主要优点是电子与材料中所有原子的相互作用很强（不需要发色团或重原子），并且所获得的动力学信息直接给出了演化系统的时间依赖性结构信息。Zewail教授和他的小组正在开发一种用于确定动态化学系统的快速结构变化的通用方法，通过测量电子短脉冲的衍射。 该研究的最终目的是开发一种方法，用于确定任何化学，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。

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.