Sequential occurrence of ZnO nanopaticles, nanorods, and nanotips during hydrothermal process in a dilute aqueous solution

被引：35

作者：

Ma, XY ^{[1
]}

Zhang, H ^{[1
]}

Ji, YJ ^{[1
]}

Xu, J ^{[1
]}

Yang, DR ^{[1
]}

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

来源：

MATERIALS LETTERS | 2005年 / 59卷 / 27期

基金：

中国国家自然科学基金;

关键词：

ZnO; hydrothermal process; nanostructure;

D O I：

10.1016/j.matlet.2005.05.076

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ZnO nanostructures have been synthesized by hydrothermal process in a dilute aqueous solution consisting of Zn(AC)(2) and NaOH. X-ray diffraction (XRD) pattern indicates that the synthesized ZnO crystal is of hexagonal phase. By means of transmission electron microscopy (TEM) and field emission scanning electron microscopy (FE-SEM), it has been revealed that the ZnO nanoparticles, nanorods and nanotips sequentially occur along with the hydrothermal process, during which the concentration of Zn source is ever decreasing. The nanoparticles terminated with pyramids firstly generate at the early stage of hydrothermal process; subsequently, a number of seed-crystals branch on the pyramids, furthermore, the homo-epitaxy based on which along the <0001> direction results in the formation of nanorods; finally, due to the extremely low concentration of Zn source, instead of the continual elongation of the nanorods, the nanotips dispersively occur on the top flat plane of nanorods as a result of selective epitaxy. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：3393 / 3397

页数：5

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