气液界面微观结构研究的一种实验新方法

许多物理、化学和生物过程发生于气液界面，且受到局域微观结构的深远影响. 不同于液体的体相，分子取向是界面处微观结构突出的不对称特征之一. 本文综述了电子碰撞时间延迟质谱方法和近期取得的进展. 利用这个崭新的方法，不仅可以侦测得到利用小角度X射线或中子散射以及振动和频光谱方法获得的界面微观结构，同时也提供了一种研究气液界面处电子驱动化学反应的实验方案.

A New Experimental Method for Investigations on Microstructure of Liquid-Vapor Interface

Many physical, chemical, and biological processes happen in liquid-vapor interface and are profoundly influenced with the local microstructures. In contrast to the liquid bulk, molecular orientation is the remarkable one of asymmetric structural features of the interface. Here we report an experimental method, namely, electron-impact time-delayed mass spectrometry and give a brief review about our recent progresses. This brand-new method not only enables us to have more insights into the interfacial structures, as done with small-angle X-ray and neutron scatterings and vibrational sum frequency generation spectroscopy, but also provides opportunity to explore the electron-driven chemical reactions therein.