KPFM/AFM imaging on TiO2(110) surface in O2 gas

被引：5

作者：

Arima, Eiji ^{[1
]}

Wen, Huan Fei ^{[1
]}

Naitoh, Yoshitaka ^{[1
]}

Li, Yan Jun ^{[1
]}

Sugawara, Yasuhiro ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Appl Phys, 2-1 Yamada Oka, Suita, Osaka 5650871, Japan

来源：

NANOTECHNOLOGY | 2018年 / 29卷 / 10期

关键词：

KPFM; catalyst; AFM; high speed imaging; TiO2; OXYGEN VACANCIES; CHARGE-STATE; DEFECTS; DISSOCIATION; REACTIVITY; CHEMISTRY; ADATOMS; WATER;

D O I：

10.1088/1361-6528/aaa62c

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We have carried out high-speed imaging of the topography and local contact potential difference (LCPD) on rutile TiO2(110) in O-2 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(-1) and observed the adsorbate on a hydroxylated TiO2(110) surface. The observed adsorbate is considered to be oxygen adatoms (O-a), hydroperoxyls (HO2), or terminal hydroxyls (OHt). 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.

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页数：8

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