A diffusion-controlled kinetic model for growth of Au-catalyzed ZnO nanorods: Theory and experiment

被引：11

作者：

Hejazi, S. R. ^{[1
]}

Hosseini, H. R. Madaah ^{[1
]}

机构：

[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran, Iran

来源：

JOURNAL OF CRYSTAL GROWTH | 2007年 / 309卷 / 01期

关键词：

diffusion-controlled; kinetic model; growth rate; VLS; ZnO nanorods;

D O I：

10.1016/j.jcrysgro.2007.08.026

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

A kinetic model for growth of ZnO nanorods via vapor-liquid-solid (VLS) mechanism based on the bulk diffusion of Zn atoms through the Au-Zn droplet is presented. The dependences of the growth rate on size are given quantitatively. A general expression for the growth rate of nanorods during VLS process is derived. The derived formula shows the dependences of growth rate on lateral size of nanorods, concentration and supersaturation of Zn atoms in the liquid droplet. Based on the presented kinetic model the smaller nanorods have faster growth rate. Au-catalyzed ZnO nanorods are grown by chemical vapor transport and condensation (CVTC) process experimentally. Theoretical and experimental rate/radius curves are compared to each other. Theoretical predictions are in good agreement with the experimental results. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：70 / 75

页数：6

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