Experimental Studies of Hyperthermal Molecular Ion-Surface Interactions

本研究项目由分析与表面化学项目资助，将详细研究多原子离子与具有良好特征的固体表面的相互作用。对分子离子-表面碰撞事件的理解对于表面诱导解离作为一种质谱分析大分子结构的方法的发展是重要的。当前工作的目标是确定和量化当分子离子撞击干净或吸附物覆盖的表面时可能发生的各种事件，包括破碎，粘附，反应，注入，溅射和离子中和。大分子和复杂分子的结构分析通常使用质谱法进行。这些方法中最有前途的一种是使用表面诱导解离来进行结构分析。这个研究项目解决了控制表面诱导解离的分子-表面碰撞的细节。对这一事件的更全面的了解将使表面诱导解离方法广泛应用于复杂的生物学相关分子的分析。

In this research project, supported in the Analytical and Surface Chemistry Program, detailed studies of the interaction of polyatomic ions with well characterized solid surfaces will be undertaken. An understanding of the molecular ion-surface collision event is important in the development of surface induced dissociation as a method for the mass spectrometric analysis of the structure of large molecules. The goal of the present work is to identify and quantify the various events which may occur when a molecular ion strikes a clean or adsorbate covered surface, including fragmentation, sticking, reaction, implantation, sputtering, and ion neutralization. %%% The structural analysis of large and complex molecules is often carried out using mass spectrometric methods. One of the most promising of these methods is the use of surface induced dissociation to enable structural analysis. This research project addresses the details of the molecule-surface collision which controls surface induced dissociation. A more complete understanding of this event will enable the widespread application of the surface induced dissociation approach to the analysis of complex, biologically relevant molecules.