Substrate-free growth, characterization and growth mechanism of ZnO nanorod close-packed arrays

被引：25

作者：

Yang, Zao ^{[1
]}

Liu, QuanHui ^{[1
]}

Yu, HongChun ^{[1
]}

Zou, Binsuo ^{[1
]}

Wang, YanGuo ^{[1
]}

Wang, T. H. ^{[1
]}

机构：

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

来源：

NANOTECHNOLOGY | 2008年 / 19卷 / 03期

关键词：

D O I：

10.1088/0957-4484/19/03/035704

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

ZnO nanorod close-packed arrays are successfully fabricated in a substrate-free manner by a citric acid assisted annealing process at a low growth temperature of 400 degrees C. Each nanorod of ZnO nanorod close-packed arrays grows along the [0001] direction and is single crystalline with an average diameter of 50 nm, and an average length of 0.5 mu m. The aspect ratio is 10. The ZnO nanorod close-packed arrays show a strong exciton absorption peak at 372 nm in UV-visible absorption spectra, exhibiting a blue-shift relative to the bulk exciton absorption (387 nm). Finally, a new growth mechanism is proposed for the substrate-free preparation of ZnO nanorod close-packed arrays by a citric acid assisted annealing process.

引用

页数：6

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