Nano-photocatalytic decomposition of a stearic acid film deposited on the TiO2 by an atomic force microscope
Nano-photocatalytic decomposition of a stearic acid film deposited on the TiO2 by an atomic force microscope
复制标题
DOI：
10.1016/j.apsusc.2004.09.158
复制
发表时间：
2005-05
影响因子：
6.7
通讯作者：
Kenkichiro Kobayashi;Y. Tomita;Kazutaka Matsuhisa;Yuji Doi
中科院分区：
文献类型：
--
作者：
Kenkichiro Kobayashi;Y. Tomita;Kazutaka Matsuhisa;Yuji Doi
硬脂酸薄膜通过真空蒸发沉积在单晶TiO2（110）衬底上。在- 10到10V的偏置电压下，在黑暗中扫描后，硬脂酸薄膜的AFM形貌图像没有变化。同样，在偏置电压<0.0V的紫外照射下，AFM形貌图像也没有变化。而在10V紫外照射下扫描后，硬脂酸膜上形成了一个尺寸为200nm×200nm的矩形空穴。硬脂酸膜上没有电流流过，而矩形孔处有−2.0V的可观电流流过。矩形孔的形成是由原子力显微镜对硬脂酸薄膜进行场辅助光催化分解的结果。
Stearic acid films have been deposited on single crystalline TiO2(110) substrates by vacuum evaporation. No changes are seen in AFM topographic images of the stearic acid films after the scan at a bias voltage of −10 to 10V in the dark. Similarly, ultraviolet irradiation at a bias voltage <0.0V brings about no changes of the AFM topographic images. In contrast, a rectangular hole with the size of 200nm×200nm is formed in the stearic acid film after the scan at 10V under ultraviolet irradiation. No current flows on the stearic acid film, whereas an appreciable current flows at −2.0V at the rectangular hole. The formation of the rectangular hole results from the field-assisted photocatalytic decomposition of the stearic acid film by AFM.