Newberg John T, Åhlund John, Arble Chris, Goodwin Chris, Khalifa Yehia, Broderick Alicia
Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, USA.
Scienta AB, Box 15120, 750 15 Uppsala, Sweden.
Rev Sci Instrum. 2015 Aug;86(8):085113. doi: 10.1063/1.4928498.
Ambient pressure X-ray photoelectron spectroscopy (APXPS) is a powerful spectroscopy tool that is inherently surface sensitive, elemental, and chemical specific, with the ability to probe sample surfaces under Torr level pressures. Herein, we describe the design of a new lab-based APXPS system with the ability to swap small volume analysis chambers. Ag 3d(5/2) analyses of a silver foil were carried out at room temperature to determine the optimal sample-to-aperture distance, x-ray photoelectron spectroscopy analysis spot size, relative peak intensities, and peak full width at half maximum of three different electrostatic lens modes: acceleration, transmission, and angular. Ag 3d(5/2) peak areas, differential pumping pressures, and pump performance were assessed under varying N2(g) analysis chamber pressures up to 20 Torr. The commissioning of this instrument allows for the investigation of molecular level interfacial processes under ambient vapor conditions in energy and environmental research.
环境压力X射线光电子能谱（APXPS）是一种强大的光谱工具，本质上对表面敏感、具有元素特异性和化学特异性，能够在托级压力下探测样品表面。在此，我们描述了一种新型的基于实验室的APXPS系统的设计，该系统能够更换小体积分析腔室。在室温下对银箔进行Ag 3d(5/2)分析，以确定三种不同静电透镜模式（加速、透射和角度）下的最佳样品到孔径距离、X射线光电子能谱分析光斑尺寸、相对峰强度和半高宽。在高达20托的不同N2(g)分析腔室压力下评估了Ag 3d(5/2)峰面积、差动抽气压力和泵性能。该仪器的调试使得在能源和环境研究中能够研究环境蒸汽条件下的分子水平界面过程。
