Controllable growth of ZnO nanorod arrays with different densities and their photoelectric properties.

Nanoscale Research Letters
Shu-jie WangZuliang Du

Abstract

Since the photoelectric response and charge carriers transport can be influenced greatly by the density and spacing of the ZnO nanorod arrays, controlling of these geometric parameters precisely is highly desirable but rather challenging in practice. Here, we fabricated patterned ZnO nanorod arrays with different densities and spacing distances on silicon (Si) substrate by electron beam lithography (EBL) method combined with the subsequent hydrothermal reaction process. By using the EBL method, patterned ZnO seed layers with different areas and spacing distances were obtained firstly. ZnO nanorod arrays with different densities and various morphologies were obtained by the subsequent hydrothermal growth process. The combination of EBL and hydrothermal growth process was very attractive and could make us control the geometric parameters of ZnO nanorod arrays expediently. Finally, the vertical transport properties of the patterned ZnO nanorod arrays were investigated through the microprobe station equipment, and the I-V measurement results indicated that the back-to-back Schottky contacts with different barrier heights were formed in dark conditions. Under UV light illumination, the patterned ZnO nanorod arrays showed a high UV ...Continue Reading

References

Dec 29, 2006·Small·Hong Jin FanMargit Zacharias
Feb 24, 2011·Nanotechnology·Michelle J S SpencerKourosh Kalantar-Zadeh
Jul 29, 2011·Nanoscale Research Letters·Qian LiGaorong Han
Aug 24, 2011·Nanoscale Research Letters·Soumen Dhara, Pk Giri
Feb 15, 2012·Nanoscale Research Letters·Zhihua ZhouZhiming Wang

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Methods Mentioned

BETA
electron beam lithography
scanning
transmission electron microscopy
electron diffraction

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