Charge Transfer and Energy Transfer in Transmission of Low Energy (<10eV) Ions Through Surfaces

该研究项目由罗格斯大学泰德·马迪教授的实验室进行，研究了极低能量离子与各种表面相互作用时的能量转移和电荷交换问题。分析和表面化学计划提供了支持，以探测低能原子和分子离子与惰性气体，薄膜金属和氧化物以及冷凝分子层的相互作用。通过电子刺激解吸在低能量下形成离子，并探测了发射离子的能量分布和同一性作为层组成和厚度的函数。实验结果将与模拟这些过程的计算结果进行比较。这些信息是我们理解许多离子表面分析技术，以及辐射化学动力学和材料低能等离子体处理的基础。低能离子与表面的相互作用在表面结构和组成离子探针分析方法的应用中，以及在材料加工和辐射化学中的低能离子相互作用中都是至关重要的。本研究项目探讨了低能离子与各种表面相互作用的详细机制，目的是获得对这些机制的分子水平的理解。详细的实验测量将与这些过程的计算研究相结合。

This research project, in the laboratory of Professor Ted Madey at Rutgers University, addresses questions of the energy transfer and charge exchange in the interaction of very low energy ions with various surfaces. Support is provided by the Analytical and Surface Chemistry Program to probe the interaction of low energy atomic and molecular ions with overlayers of inert gases, thin film metals and oxides, and condensed molecular layers. Ions are formed at low energies by electron stimulated desorption, and the energy distribution and identity of emitted ions is probed as a function of overlayer composition and thickness. Experimental results will be compared with calculations which simulate these processes. This information is basic to our understanding of many ion based surface analysis techniques, as well as the dynamics of radiation chemistry and low energy plasma processing of materials. The interaction of low energy ions with surfaces is crucial in the application of analytical methods using ion probes of surface structure and composition, as well as in the interaction of low energy ions in materials processing and in radiation chemistry. This research project explores the detailed mechanism of the interaction of low energy ions with a variety of surfaces, with the goal of obtaining a molecular level understanding of these mechanisms. Detailed experimental measurements will be coupled with calculational studies of these processes.