Acquisition of an Advanced Surface Microscopy Facility

小行星9512231 将建立一个先进的表面显微镜设施，包括安装在同一真空系统内的一台高真空低能电子显微镜（LEEM）和一台高真空扫描隧道显微镜（STM），两台仪器之间将进行样品转移。LEEM和STM这两种仪器在同一真空环境中的组合将使材料表面的结构研究既具有原子分辨率（STM）又具有真实的时间（LEEM）。这两种显微镜将允许在成像和沉积金属和吸附物过程中控制样品温度。该设施将由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。其中包括：（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）对吸附物的结构影响，如偏析、扩散和反应性;（3）纳米级材料的合成和表征，如量子点、薄膜富勒烯聚合物和纳米团簇。 两种互补类型的表面显微镜，低能电子显微镜和扫描隧道显微镜，将被用来探测表面系统与不同的空间和时间分辨率作为一个重要的参数，如温度和覆盖的吸附。 存在的可能性，以图像的一类重要的催化剂，同时研究它们的反应性和催化性能。 ***

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. ***