Surface Chemistry Studies with Ion Beams and Lasers

在这个由分析和表面化学项目支持的研究项目中，激光定位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的Nicholas Winograd教授小组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质电离的动力学。研究的重点是使用这些方法的组成和结构表征的有机，聚合物和生物表面。基本理解和方法开发都是这个研究项目的目标。实验测量与最先进的解吸离子轨迹计算研究相结合，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高分子表面到生物膜等材料的性质至关重要。宾夕法尼亚州立大学的这项研究项目的目标是发展对这些重要材料表面特征的离子解吸质谱和离子成像方法所需要的基本理解。基础研究和方法开发的结合是这个项目的特点。

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.