Adsorption and desorption of oxygen probed from ZnO nanowire films by photocurrent measurements

被引：429

作者：

Li, QH

Gao, T

Wang, YG

Wang, TH ^{[1
]}

机构：

[1] Hunan Univ, Micronano Technol Res Ctr, Changsha 410082, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 12期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.1883711

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Sensing mechanisms of ZnO nanowire films are investigated by performing transient photocurrent measurements. The current jumps upon ultraviolet or green laser illumination. The amplitude in the jump is strongly dependent on the ambient atmosphere. The decay rate is much more sensitive to the ambient atmosphere than the rise rate. The fast rise is due to rapid photogenerated carriers and the slow decay is controlled by slow surface process. Our experimental results indicate that the oxygen physisorption rate is slower than the chemisorption rate. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

共 18 条

[1] Photoresponse of sol-gel-synthesized ZnO nanorods [J].