MRI: Acquisition of an X-ray Photoelectron Spectrometer (XPS)

有了这个来自主要研究仪器（MRI）计划的奖项，圣母大学的Marya Lieberman教授和同事Paul Bohn，Patricia Maurice，Peter Burns和富兰克林陶将获得X射线光电子能谱仪（XPS）。该奖项将加强各级的研究培训和教育，特别是在以下领域：（a）“智能”材料的半导体和聚合物表面化学，（B）自组装单分子层、生物分子/表面粘附的研究，（c）DNA损伤和修复，（d）催化剂设计和表征以及材料库，（e）催化剂的反应机制，（f）锕系矿物的表面化学，（g）土壤和矿物表面化学。化学分析使用X射线光电子能谱仪。XPS技术定量测量给定材料中元素的元素组成、经验式、化学状态和电子状态。用一束单色X射线照射样品，测量产生的光电子的动能，并将其与特定元素联系起来。XPS通常在定义所研究的系统方面起着至关重要的作用。该技术需要使用超高真空条件。这些研究人员将要开展的工作代表了一系列需要表面表征的系统。该仪器将用于研究活动，也为来自不同背景的大量学生的研究培训和教育，并将服务于推广活动，以邻近的机构，如圣玛丽学院，印第安纳州大学南本德和印第安纳州大学西北。

With this award from the Major Research Instrumentation (MRI) Program, Professor Marya Lieberman from University of Notre Dame and colleagues Paul Bohn, Patricia Maurice, Peter Burns and Franklin Tao will acquire an X-ray Photoelectron Spectrometer (XPS). The award will enhance research training and education at all levels, especially in areas such as (a) semiconductor and polymer surface chemistry of "smart" materials, (b) studies of self-assembled monolayers, biomolecule/surface adhesion, (c) DNA damage and repair, (d) catalyst design and characterization as well as libraries of materials, (e) reaction mechanisms of catalysts, (f) surface chemistry of actinide minerals, and (g) soil and mineral surface chemistry.X-ray photoelectron spectrometers are used for chemical analysis. The XPS technique quantitatively measures elemental composition, empirical formula, chemical state and electronic state of the elements in a given material. A sample is irradiated with a beam of monochromatic X-rays and the kinetic energies of the resulting photoelectrons are measured and related to specific elements. XPS often plays a crucial role in defining the system under study. The technique requires the use of ultra high vacuum conditions. The work to be carried out by these investigators represents a wide array of systems requiring surface characterization. The instrumentation will be used in research activities and also for research training and education of a large number of students from diverse backgrounds and will serve for outreach activities to neighboring institutions such as Saint Mary's College, Indiana University South Bend and Indiana University Northwest.