Surface Chemistry Studies with Ion Beams and Lasers

在这项由分析和表面化学计划支持的研究项目中，激光正电化方法被用来检测和识别从高能离子轰击的表面解吸的中性物质。宾夕法尼亚州立大学尼古拉斯·维诺格拉德教授的团队正在研究离子诱导解吸的基本过程，以及基质辅助解吸和分子表面物种电离的动力学。研究的重点是使用这些方法对有机、聚合物和生物表面的组成和结构进行表征。基础理解和方法开发都是本研究项目的目标。实验测量与最先进的解吸离子轨迹的计算研究相结合，以提供对离子诱导解吸过程的更完整的理解。分子表面的结构表征对于理解从聚合物表面到生物膜的各种材料的性质是至关重要的。宾夕法尼亚州立大学的这项研究项目的目标是发展实施离子解吸、质谱学和离子成像方法所需的基本理解，以表征这些重要的材料表面。这个项目的特点是基础研究和方法开发相结合。

Laser postionization methods are used to detect and identify neutral species desorbing from surfaces bombarded with energetic ions in this research project supported by the Analytical and Surface Chemistry Program. Professor Nicholas Winograd's group at the Pennsylvania State University is investigating the basic processes of ion induced desorption and the dynamics of matrix assisted desorption and ionization of species from molecular surfaces. The research focusses on the use of these methods for the compositional and structural characterization of organic, polymeric, and biological surfaces. Both fundamental understanding and method development are goals of this research project. Experimental measurements are combined with state of the art computational studies of the trajectories of the desorbed ions, to provide a more complete understanding of the ion induced desorption process. The structural characterization of molecular surfaces is essential to developing an understanding of the properties of materials ranging from polymeric surfaces to biological membranes. The goal of this research project at the Pennsylvania State University is to develop the basic understanding that is needed to implement ion desorption mass spectrometry and ion imaging methods for the characterization of these important material surfaces. A combination of fundamental research and method development characterizes this project.