Arima Eiji, Wen Huan Fei, Naitoh Yoshitaka, Li Yan Jun, Sugawara Yasuhiro
Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Japan.
Nanotechnology. 2018 Mar 9;29(10):105504. doi: 10.1088/1361-6528/aaa62c.
We have carried out high-speed imaging of the topography and local contact potential difference (LCPD) on rutile TiO(110) in O gas by atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM). We succeeded in KPFM/AFM imaging with atomic resolution at 1 frame min and observed the adsorbate on a hydroxylated TiO(110) surface. The observed adsorbate is considered to be oxygen adatoms (O), hydroperoxyls (HO), or terminal hydroxyls (OH). After adsorption, changes in the topography and the LCPD of the adsorbate were observed. This phenomenon is thought to be caused by the charge transfer of the adsorbate. This technique has the potential to observe catalytic behavior with atomic resolution.
我们通过原子力显微镜（AFM）和开尔文探针力显微镜（KPFM）对金红石型TiO(110)在O气体中的形貌和局部接触电势差（LCPD）进行了高速成像。我们成功地以每分钟1帧的原子分辨率进行了KPFM/AFM成像，并观察到了羟基化TiO(110)表面的吸附物。观察到的吸附物被认为是氧原子（O）、氢过氧基（HO）或末端羟基（OH）。吸附后，观察到吸附物的形貌和LCPD发生了变化。这种现象被认为是由吸附物的电荷转移引起的。该技术有潜力以原子分辨率观察催化行为。
