Experimental and Theoretical Studies of Molecular Motions inLiquids

Kivelson教授得到了实验物理化学计划的资助，该计划使用实验和理论方法研究液体中的分子运动。特别强调过冷液体在接近玻璃化转变温度时的研究，以及正在发生化学反应的液体体系。当过冷液体接近玻璃化转变温度时，它们变得非常粘稠，松弛过程变得缓慢且比较高温度下的低粘度液体更复杂。Kivelson教授的研究小组正在研究玻璃化转变温度附近的小分子和聚合物溶液的行为。此外，其他研究的目的是了解化学反应基团在周围流体中的运动和跨越化学反应的活化势垒。这一领域的研究对研究液相中的化学反应具有重要意义。理解这些现象的共同理论框架包括广义流体动力学的关联函数描述。Kivelson团队用来研究这些分子运动的主要实验技术是准弹性光散射。

Professor Kivelson is supported by a grant from The Experimental Physical Chemistry Program to study molecular motions in liquids using both experimental and theoretical approaches. Particular emphasis is placed on the study of supercooled liquids as they approach the glass transition temperature, and liquid systems undergoing chemical reaction. As supercooled liquids approach the glass transition temperature they become very viscous, and relaxation processes become slow and more complex than for low viscosity fluids at higher temperatures. Professor Kivelson's research group is studying the behavior of small molecules and polymer solutions near the glass transition temperature. In addition, other studies are aimed at understanding the motion of reacting groups through surrounding fluid and across activation barriers for chemical reactions. This area of research is of fundamental importance to the study of chemical reactions in the liquid phase. The common theoretical framework for understanding these phenomena consists of a correlation function description of generalized hydrodynamics. The primary experimental technique used by Kivelson's group to study these molecular motions is quasielastic light scattering.