Undergraduate Laboratory In Surface Science

9352254 OKUMURA正在开发一门表面科学的四分之一本科实验室课程，以向化学专业的学生介绍表面化学研究中常用的概念和技术。本课程是对我们现有的物理化学实验课程的补充，该课程强调气相和凝聚相主题。为了纳入新材料，我们正在将物理化学实验室从四分之一扩大到三季度。五项实验正在进行中。学生们将在特高压表面装置上进行三项实验：用俄歇电子能谱(AES)进行表面成分的元素分析，用低能电子衍射(LEED)研究表面结构，以及用程序升温脱附(TPD)测量化学吸附分子的脱附动力学。在第四个实验中，与空气中的扫描隧道显微镜(STM)互补的方法正在研究表面结构；重点是表面电子态。最后，用透射式傅里叶变换红外光谱研究了负载型金属颗粒上的吸附结构。该机构已经购买了真空室、LEED光学元件和样品机械手，并为特高压仪器提供了真空泵。该装置包括TPD的样品安装和引入硬件、电子学和残余气体分析仪。在表面成像实验中使用了指导性扫描隧道显微镜。最后，我们正在升级现有的FTIR光谱仪，用于吸附光谱分析实验。***

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. ***