ZnO nanorods via spray deposition of solutions containing zinc chloride and thiocarbamide

被引：46

作者：

Dedova, Tatjana ^{[1
]}

Volobujeva, Olga ^{[1
]}

Klauson, Jelena ^{[1
]}

Mere, Arvo ^{[1
]}

Krunks, Malle ^{[1
]}

机构：

[1] Tallinn Univ Technol, Dept Mat Sci, EE-19086 Tallinn, Estonia

来源：

NANOSCALE RESEARCH LETTERS | 2007年 / 2卷 / 08期

关键词：

ZnO nanorods; spray pyrolysis; thiocarbamide; zinc chloride; growth mechanism; SEM; PL;

D O I：

10.1007/s11671-007-9072-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work we present the results on formation of ZnO nanorods prepared by spray of aqueous solutions containing ZnCl2 and thiocarbamide (tu) at different molar ratios. It has been observed that addition of thiocarbamide into the spray solution has great impact on the size, shape and phase composition of the ZnO crystals. Obtained layers were characterized by scanning electron microscopy (SEM) equipped with energy selected backscattered electron detection system (ESB), X-ray diffraction (XRD) and photoluminescence spectroscopy (PL). Small addition of thiocarbamide into ZnCl2 solution (ZnCl2:tu = 1: 0.25) supports development of significantly thinner ZnO nanorods with higher aspect ratio compared to those obtained from ZnCl2 solution. Diameter of ZnO rods decreases from 270 to 100 nm and aspect ratio increases from similar to 2.5 to 12 spraying ZnCl2 and ZnCl2: tu solutions, respectively. According to XRD, well crystallized (002) orientated pure wurtzite ZnO crystals have been formed. However, tiny 'spot'-like formations of ZnS were detected on the side planes of hexagonal rods prepared from the thiocarbamide containing solutions. Being adsorbed on the side facets of the crystals ZnS inhibits width growth and promotes longitudinal c-axis growth.

引用

页码：391 / 396

页数：6

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