Surface Chemistry Studies with Ion Beams and Lasers

使用离子束和激光进行表面化学研究

• 批准号: 9986337
• 负责人: Nicholas Winograd
• 金额: $ 89.19万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-03-01 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9986337&HistoricalAwards=false
• 关键词: Surface; Chemistry; Studies; Ion; Beams

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.

激光定位方法被用来检测和识别中性物种解吸从表面轰击高能离子在本研究项目的分析和表面化学计划的支持。 宾夕法尼亚州立大学的Nicholas Winograd教授的小组正在研究离子诱导解吸的基本过程和基质辅助解吸的动力学以及分子表面物种的电离。 该研究的重点是使用这些方法的有机，聚合物和生物表面的组成和结构表征。 基本的理解和方法的发展是本研究项目的目标。 实验测量结合最先进的计算研究的解吸离子的轨迹，以提供一个更完整的理解的离子诱导解吸过程。分子表面的结构表征对于了解从聚合物表面到生物膜等材料的性质至关重要。 在宾夕法尼亚州立大学的这个研究项目的目标是发展的基本理解，需要实施离子解吸质谱和离子成像方法的表征这些重要的材料表面。 基础研究和方法开发相结合的特点是这个项目。