Transport properties in single-crystalline rutile TiO2 nanorods

被引：19

作者：

Chen, R. S. ^{[1
]}

Chen, C. A. ^{[2
]}

Wang, W. C. ^{[2
]}

Tsai, H. Y. ^{[3
]}

Huang, Y. S. ^{[2
,3
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Grad Inst Appl Sci & Technol, Taipei 10607, Taiwan

[2] Natl Taiwan Univ Sci & Technol, Dept Elect Engn, Taipei 10607, Taiwan

[3] Natl Taiwan Univ Sci & Technol, Grad Inst Electroopt Engn, Taipei 10607, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 22期

关键词：

impurity states; MOCVD; nanofabrication; nanorods; nanotubes; photoconducting materials; photoconductivity; titanium compounds; NANOTUBE ARRAYS; PHOTODETECTORS; GAN;

D O I：

10.1063/1.3665635

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Electronic transport properties of the single-crystalline titanium dioxide (TiO2) nanorods (NRs) with single rutile phase have been investigated. The conductivity values for the individual TiO2 NRs grown by metal-organic chemical vapor deposition are in the range of 1-10 Omega(-1) cm(-1). The temperature-dependent measurement shows the presence of two shallow donor levels/bands with activation energies at 8 and 28 meV, respectively. On the photoconductivity (PC), the TiO2 NRs exhibit the much higher normalized PC gain and sensitive excitation-power dependence than the polycrystalline nanotubes. The results demonstrate the superior photoconduction efficiency and distinct mechanism in the monocrystalline one-dimensional TiO2 nanostructures in comparison to the polycrystalline or nanoporous counterparts. (C) 2011 American Institute of Physics. [doi:10.1063/1.3665635]

引用

页数：3