Auger-Photoelectron Coincidence Spectroscopy Studies of Surface Alloys, Ultrathin Metal Films, and Layered Compounds

w：\awards\awards96\*.doc 9801681 Bartynski 这个实验研究项目与表面分析有关 利用俄歇-光电子符合 光谱学（APECS）侧重于表面合金，金属薄膜和层状化合物的局部电子特性。 在这种技术中，核心光电子及其相关的俄歇电子在时间上重合地被检测到。这种方法是用来探测电子结构与高表面特异性，并研究极低的缺陷浓度的氧化物表面。 的系统 下 研究 包括表面 合金 Ag/Cu（100）、Au/Ni（110）、Pd/Cu（100）和Ag/Pd（100）。表面原子混合，即使组分在本体中不混溶。 低维系统和分子吸附物和表面缺陷之间的相互作用也是感兴趣的。大部分工作是在布鲁克海文的国家同步加速器光源进行的 国家实验室。 本研究 程序 是跨学科的性质，涉及一个或多个博士后， 研究生，他们接受了良好的培训 为工业、政府实验室或学术界的职业生涯做准备。 这个实验研究项目涉及研究样品最外层原子层的先进方法。 这样的表面分析方法通常采用落在样品上的光（光子）束，这可以导致其他电子和/或光被射出。在目前的工作中，探测到的粒子是一个电子和一个光子，它们在时间上是重合的，这表明它们都来自同一个原子事件。 的这种方法 “Auger-Photoelectron Coincidence Spectroscopy（APECS）”主要用于研究表面合金、金属薄膜和层状化合物的局部电子性质。的系统 下 研究 包括表面 阿洛伊斯 Ag/Cu（100）、Au/Ni（110）、Pd/Cu（100）和Ag/Pd（100）。表面原子混合，即使组分在本体中不混溶。 低维系统和分子吸附物和表面缺陷之间的相互作用也是感兴趣的。大部分工作是在布鲁克海文的国家同步加速器光源进行的 国家实验室。 本研究 程序 是跨学科的性质，涉及一个或多个博士后， 研究生，他们接受了良好的培训 为工业、政府实验室或学术界的职业生涯做准备。 ***

w:\awards\awards96\*.doc 9801681 Bartynski This experimental research project is concerned with surface analysis using Auger-Photoelectron Coincidence Spectroscopy (APECS) focusing on local electronic properties of surface alloys, ultrathin metal films, and layered compounds. In this technique, a core photoelectron and its associated Auger electron are detected in time coincidence. This method is used to probe electronic structure with high surface specificity and to study extremely low defect concentrations on oxide surfaces. The systems under study include surface alloys Ag/Cu(100), Au/Ni(110), Pd/Cu(100 and Ag/Pd(100). The surface atoms intermix, even though the components are immiscible in the bulk. Low dimensional systems and interactions between molecular adsorbates and surface defects are also of interest. A large portion of the work is carried out at the National Synchrotron Light Source at Brookhaven National Laboratory. This research program is interdisciplinary in nature and involves one or more postdoctoral and graduate students, who receive excellent training in preparation for careers in industry, government laboratories or academia. %%% This experimental research project is concerned with advanced methods to study the outermost atomic layers of a sample. Such surface analysis methods typically employ a light (photon) beam falling on the sample, which can lead to other electron(s) and/or light being ejected. In the present work the detected particles are an electron and a photon, which are coincident in time, which is an indication that they both come from the same atomic event. This method of "Auger-Photoelectron Coincidence Spectroscopy (APECS)" is used to focus on local electronic properties of surface alloys, ultrathin metal films, and layered compounds. The systems under study include surface allo ys Ag/Cu(100), Au/Ni(110), Pd/Cu(100 and Ag/Pd(100). The surface atoms intermix, even though the components are immiscible in the bulk. Low dimensional systems and interactions between molecular adsorbates and surface defects are also of interest. A large portion of the work is carried out at the National Synchrotron Light Source at Brookhaven National Laboratory. This research program is interdisciplinary in nature and involves one or more postdoctoral and graduate students, who receive excellent training in preparation for careers in industry, government laboratories or academia. ***