Structure and Reactivity of Pd Monolayers and Ultrathin Films

利用俄歇电子能谱、低能电子衍射、紫外光电子能谱、碱离子散射能谱和前向聚焦角分辨x射线光电子能谱等表面科学技术对超薄膜和单层材料进行检测。待研究的体系包括钯膜。将主要使用高分辨率电子能量损失光谱和温度程序解吸来研究各种气体（包括一氧化碳、一氧化氮、二氧化氮、乙烯和乙炔）对薄膜性能的影响。动力学研究将进行，一些催化反应将进行检查。所使用的分析探针有能力探测所研究材料的几何和电子结构的细微变化，并且应该能够更好地理解化学吸附和反应性。在分析和表面化学的一般领域，研究重点是在早期过渡金属单晶衬底上钯的单层和超薄膜的表面科学研究。本研究旨在将这些研究与薄膜的化学吸附和反应性质联系起来。这项工作有望使人们对金属薄膜的性质有更深入的了解，这将在材料科学和催化领域有广泛的重要应用。

The surface science techniques of Auger electron spectroscopy, low energy electron diffraction, ultraviolet photoelectron spectroscopy, alkali ion scattering spectroscopy and forward focusing angle-resolved X-ray photoelectron spectroscopy will be used to examine ultrathin films and monolayers. The systems to be studied include palladium films. Studies will be carried out of the effect of various gases, including carbon monoxide, nitric oxide, nitrogen dioxide, ethylene and acetylene, on the film properties using primarily high resolution electron energy loss spectroscopy and temperature programmed desorption. Kinetic studies will be performed and some catalytic reactions will be examined. The analytical probes used have the ability to probe subtle changes in the geometric and electronic structure of the materials studied, and should enable a better understanding of chemisorption and reactivity to be obtained. %%% The research, in the general area of Analytical and Surface Chemistry, focuses on surface science studies of monolayers and ultrathin films of palladium on early transition metal single crystal substrates. The study aims to correlate these studies with the chemisorption and reaction properties of the films. The work promises to lead to a greater understanding of the properties of thin metal films which will have a wide range of important applications in materials science and catalysis.