Zinc oxide nanowire based field emitters

被引：3

作者：

Ramanathan, Sivakumar ^{[1
]}

Chen, Yu-chun ^{[2
]}

Tzeng, Yonhua ^{[2
]}

机构：

[1] Virginia Commonwealth Univ, Dept Elect & Comp Engn, Richmond, VA 23284 USA

[2] Auburn Univ, Dept Elect Engn, Auburn, AL 36849 USA

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2010年 / 43卷 / 01期

基金：

美国国家科学基金会;

关键词：

EMISSION PROPERTIES; NANOPOROUS ALUMINA; ARRAYS;

D O I：

10.1016/j.physe.2010.07.072

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report the field emission properties of 50 nm diameter ZnO nanowires that were electrochemically self-assembled within pores of an anodic alumina film. Current versus voltage measurements of the Fowler-Nordheim tunneling current indicate that the turn-on field is 15 V mu m(-1) and the field enhancement factor beta calculated for two sets of samples turned out to be 670 and 1481, respectively (theoretical value for beta in bulk ZnO is 205). The enhancement in beta is most likely due to the large aspect ratio of the nanowires. Variation in the length of the nanowires causes the screening effect, which increases the turn-on field and reduces the emission current density. The current-voltage characteristics of the wires are non-linear and show a rectifying behavior. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：285 / 288

页数：4

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