Surfactant free hydrothermally derived ZnO nanowires, nanorods, microrods and their characterization

被引：39
|
作者：
Nagaraju, G. [1 ]
Ashoka, S. [1 ]
Chithaiah, P. [1 ]
Tharamani, C. N. [2 ]
Chandrappa, G. T. [1 ]
机构：
[1] Bangalore Univ, Dept Chem, Bangalore 560056, Karnataka, India
[2] Univ Saskatchewan, Dept Chem, Saskatoon, SK S7N 5C9, Canada
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2010年 / 13卷 / 01期
关键词：
Surfactant; Hydrothermal; Nanorods; Nanowires; Microrods; ZINC-OXIDE; LOW-TEMPERATURE; GROWTH; NANOSTRUCTURES; EMISSION; NANOCRYSTALS; UV;
D O I：
10.1016/j.mssp.2010.02.002
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
ZnO nanowires, nanorods and microrods have been prepared by an organic-free hydrothermal process using ZnSO4 and NaOH/NH4OH solutions. The powder X-ray diffraction (PXRD) patterns reveal that the ZnO nano/microrods are of hexagonal wurtzite structure. The Fourier transform infrared (FT-IR) spectrum of ZnO powder shows only one significant spectroscopic band at around 417 cm(-1) associated with the characteristic vibrational mode of Zn-O bonding. The thickness 75-300 nm for ZnO nanorods and 0.2-1.8 mu m for microrods are identified from SEM/TEM images. UV-visible absorption spectra of ZnO nano/microrods show the blue shift. The UV band and green emission observed in photoluminescence (PL) spectra are due to free exciton emission and singly ionized oxygen vacancy in ZnO. Finally, the mechanism for organic-free hydrothermal synthesis of the ZnO nano/microrods is discussed. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：21 / 28
页数：8
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