Characterization of ZnO needle-shaped nanostructures grown on NiO catalyst-coated Si substrates

被引：53

作者：

Kim, TY

Kim, JY

Lee, SH

Shim, HW

Lee, SH

Suh, EK

Nahm, KS ^{[1
]}

机构：

[1] Chonbuk Natl Univ, Nanomat Res Ctr, Chonju 561756, South Korea

[2] Chonbuk Natl Univ, Sch Chem Engn & Technol, Chonju 561756, South Korea

[3] Chonbuk Natl Univ, Dept Semicond Sci Technol, Chonju 561756, South Korea

[4] FED Project Team, Adv Inst Technol, Suwon 440600, South Korea

来源：

SYNTHETIC METALS | 2004年 / 144卷 / 01期

关键词：

ZnO nanostructures; nano-needles; evaporation of Zn; characterization; growth mechanism;

D O I：

10.1016/j.synthmet.2004.01.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

ZnO nanostructures were synthesized over NiO-coated Si substrate by a thermal evaporation of Zn powders in a vertical chemical vapor deposition (CVD) reactor. The ZnO nanostructures had a needle-like morphology and the diameter of the structures decreased linearly from the bottom to the top. The bottom diameters of the ZnO nano-needles normally ranged from 20 to 100 nm and the lengths were in the range of 2-3 mum. The clear lattice fringes in HRTEM image indicated the growth of good quality hexagonal single-crystal ZnO. Field emission (FE) characteristics of the ZnO nano-needles showed that the turn-on field was about 8.87 V/mum with a field enhancement factor of about 1099. The growth mechanism of the ZnO nano-needles was proposed on the basis of experimental data. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：61 / 68

页数：8

共 41 条

[1] Catalytic growth of high quality GaN micro-crystals [J].