Identifying Hydroxyls on the TiO2 (110)-1 x 1 Surface with Scanning Tunneling Microscopy
Identifying Hydroxyls on the TiO2 (110)-1 x 1 Surface with Scanning Tunneling Microscopy
复制标题
使用扫描隧道显微镜识别 TiO2 (110)-1 x 1 表面上的羟基
DOI：
10.1021/jp901657u
复制
发表时间：
2009-07-30
影响因子：
3.7
通讯作者：
Hou, J. G.
中科院分区：
文献类型：
--
作者：
Cui, Xuefeng;Wang, Zhuo;Hou, J. G.
我们使用扫描隧道显微镜（STM）对羟基化TiO 2（110）-1 x 1表面进行了研究。在室温下的STM测量中，观察到TiO_2（110）表面上羟基（OH）的突起与针尖-样品距离有关。与五配位Ti原子和氧空位的相对表观高度相比，通过改变成像条件，随着针尖-样品距离的减小，OH的相对表观高度越来越小。OH甚至在更短的尖端-样品距离内变得不可见。可逆地，当成像条件恢复时，OH几乎完全恢复。这表明，在STM测量中，可以通过改变成像条件来识别OH。
We present the investigations of hydroxylated TiO2 (110)-1 x 1 surfaces using scanning tunneling microscopy (STM). It is observed that in topographic images the protrusions of hydroxyls (OH) on TiO2 (110) surfaces are dependent oil the tip-sample distance in STM measurements at room temperature. In comparison with those of the fivefold coordinated Ti atoms and the oxygen vacancies, the relative apparent height of OHs becomes smaller and smaller with decreasing tip-sample distance by changing the imaging conditions. The OHs even become invisible in much shorter tip-sample distances. Reversibly, the OHs are almost completely recovered when the imaging conditions are restored. It suggests that the OHs may be identified by varying the imaging conditions in STM measurement.