Acquisition of an Advanced Surface Microscopy Facility

9512231江将建立一个先进的表面显微镜设施，包括一个超高真空低能电子显微镜和一个超高真空扫描隧道显微镜，安装在同一真空系统中，在两台仪器之间进行样品转移。LEEM和STM这两种仪器在同一超高真空环境中的结合，将能够以原子分辨率(STM)和实时(LEEM)研究材料表面的结构。这两种显微镜都将允许在成像和沉积金属和吸附物期间控制样品温度。该设备将由11名研究人员及其研究小组使用，以研究几个关键领域的表面特性。这些包括：(1)表面结构变化的动力学，如金属、半导体和氧化物覆盖层的成核和生长；(2)对吸附的结构影响，如分离、扩散和反应；(3)纳米材料的合成和表征，如量子点、薄膜富勒烯聚合物和纳米簇。%两种互补的表面显微镜，低能电子显微镜和扫描隧道显微镜，将被用来探测随着温度和吸附物质覆盖率等重要参数而变化的空间和时间分辨率的表面系统。有可能对一类重要的催化剂进行成像，同时研究它们的反应活性和催化性能。***

9512231 Chiang An advanced surface microscopy facility, consisting of an ultrahigh vacuum low energy electron microscope (LEEM) and a ultrahigh vacuum scanning tunneling microscope (STM) installed within the same vacuum system with sample transfer between the two instruments, will be established. The combination of the two instruments, LEEM and STM, within the same ultrahigh vacuum environment will enable the structural study of the surfaces of materials with both atomic resolution (STM) and in real time (LEEM). Both microscopes will permit control of the sample temperature during imaging and deposition of metals and adsorbates. The facility will be used by eleven investigators and their research groups to study surface properties in several key areas. These include: (1) dynamics of surface structural changes, such as nucleation and growth of metal, semiconductor, and oxide overlayers; (2) structural effects on adsorbates, such as segregation, diffusion, and reactivity; (3) synthesis and characterization of nanoscale materials, such as quantum dots, thin-film fullerene polymers, and nanoclusters. %%% Two complementary types of surface microscopes, a low energy electron microscope and a scanning tunneling microscope, will be utilized to probe surface systems with varying spatial and time resolution as a function of important parameters such as temperature and coverage of adsorbates. The possibility exists to image an important class of catalysts and simultaneously investigate their reactivities and catalytic properties. ***