Surface Chemistry Studies with Ion Beams

该奖项由2009年美国复苏和再投资法案(公法111-5)资助。在分析和表面化学项目的支持下，宾夕法尼亚州立大学的Nicholas Winograd教授寻求加深对高能粒子束与固体相互作用的基本方面的理解，使其能够在各种表面化学研究中获得新的应用。重点是利用团簇离子束，特别是那些由高能C60分子组成的原子束，进行分子深度剖面实验，目的是检查深度分辨率低于5 nm的多层分子薄膜结构的埋藏界面，从而提供具有复杂结构的材料的三维分析。计算机模拟支持实验测量，旨在了解离子束侵蚀过程中地形的变化，并补偿不同材料之间的不同侵蚀速率。还寻求了抑制化学损伤积累和提高敏感性的方法。这项研究的结果将在质谱学、聚合物科学、天体物理学、药物发现、地质学和化学成像等不同领域得到广泛应用。学生在附近经济条件较差的学区参加K-12讲座，并获得可在职业生涯中应用的宝贵技能。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).With support from the Analytical and Surface Chemistry Program, Professor Nicholas Winograd of Pennsylvania State University seeks enhanced understanding fundamental aspects of the interaction of energetic particle beams with solids to enable novel applications in a variety of surface chemistry studies. The focus is to utilize cluster ion beams, particularly those composed of energetic C60 molecules, for molecular depth profiling experiments with an aim of examining buried interfaces of multilayer molecular thin film structures with a depth resolution of less than 5 nm, thereby providing 3-dimensional analysis of materials with complex architectures. Computer simulations support experimental measurements aimed at understanding the changes in topography during ion beam erosion, and compensating for differential erosion rates across heterogeneous materials. Methods to inhibit chemical damage accumulation and increase sensitivity are also sought. Results from this research should find widespread application in such diverse fields as mass spectrometry, polymer science, astrophysics, drug discovery, geology and chemical imaging. Students participate in K-12 presentations in economically disadvantaged nearby school districts as well as gaining invaluable skills that can be applied in a professional career.