Undergraduate Laboratory In Surface Science

9352254 Okumura为了向化学专业学生介绍表面化学研究中常用的概念和技术，正在开设四分之一的本科表面科学实验课程。本课程补充了我们现有的强调气相和凝聚相主题的物理化学实验课程。为了采用这种新材料，我们正在把物理化学实验室从两个部门扩大到三个部门。目前正在进行五项实验。学生们将在特高压表面设备上进行三个实验：用俄格电子能谱（AES）分析表面成分，用低能电子衍射（LEED）研究表面结构，用程序升温解吸（TPD）测量化学吸附分子的解吸动力学。在第四个实验中，利用扫描隧道显微镜（STM）对空气中的表面结构进行了补充研究；重点是表面电子态。最后，利用透射傅里叶变换红外光谱研究了金属颗粒上吸附物的结构。该机构已经购买了真空室，LEED光学器件和样品操纵器，并为特高压仪器提供了真空泵。该仪器包括样品安装和导入硬件、电子和TPD残留气体分析仪。在表面成像实验中使用了指导性STM。最后，我们正在对现有的FTIR光谱仪进行升级，用于吸附质光谱实验。＊＊＊

9352254 Okumura A one quarter undergraduate laboratory course in surface science is being developed in order to introduce chemistry majors to concepts and techniques commonly employed in studies of chemistry on surfaces. This program complements our existing physical chemistry laboratory course which emphasizes gas phase and condensed phase topics. To incorporate the new material, we are expanding the physical chemistry laboratory from two quarters to three. Five experiments are being developed. Students are performing three experiments on a UHV surface apparatus: elemental analysis of surface composition by Auger Electron Spectroscopy (AES), surface structure studies using Low Energy Electron Diffraction (LEED), and desorption kinetics measurements of chemisorbed molecules by Temperature Programmed Desorption (TPD). In a fourth experiment, surface structure is being studied in a complementary approach with a scanning tunneling microscope (STM) in air; the emphasis is on surface electronic states. Finally, transmission FT-IR spectroscopy is being used to examine structure of adsorbates on supported metal particles. The institution has already purchased a vacuum chamber, LEED optics, and sample manipulator, and made available vacuum pumps for the UHV instrument. This apparatus is being completed by including sample mounting and introduction hardware, electronics, and residual gas analyzer for TPD. An instructional STM is being used in the surface imaging experiment. Finally, we are upgrading an existing FTIR spectrometer for the adsorbate spectroscopy experiment. ***