Field emission properties of zinc oxide nanowires fabricated by thermal   evaporation

doi:10.1016/j.physe.2006.08.008

CORC > 北京大学 > 信息科学技术学院

	Field emission properties of zinc oxide nanowires fabricated by thermal evaporation
	Wang, Weiwei ; Zhang, Gengmin ; Yu, Ligang ; Bai, Xin ; Zhang, Zhaoxiang ; Zhao, Xingyu
刊名	physica e low dimensional systems nanostructures
	2007
关键词	zinc oxide nanowire field emission thermal evaporation silicon substrate adherence CARBON NANOTUBES WORK FUNCTION ELECTRON-EMISSION SURFACES MODEL
DOI	10.1016/j.physe.2006.08.008
英文摘要	Arrays of randomly oriented zinc oxide (ZnO) nanowires were fabricated on silicon wafers via a simple thermal evaporation method. During the fabrication, the temperature around the substrate was below 500 degrees C. The products were analyzed by conventional means and determined to be single crystals of wurtzite-type ZnO that grew along the c-axis. These nanowires were 10-100 nm in diameter and 10-100 mu m in length, suggesting a possible high field enhancement factor. The dependence of the field emission current on the anode-cathode voltage (I-V behavior) of the ZnO nanowire arrays was measured in a lab-built ultrahigh vacuum system with a base pressure of 10(-7) Pa. After surface cleaning by heat treatment, two characteristic electric fields, under which 10 mu A/cm(2) and 1 mA/cm(2) current densities were extracted, were measured to be 4.0 and 4.7 V/mu m, respectively. As observed with a transparent anode, emission occurred uniformly over the whole sample surface. A 72 h-long test on emission stability was performed under a constant voltage of 2.75 kV. The current dropped occasionally to approximately 80% of the initial value during the test owing to the poor adherence of the nanowires to the substrate. These preliminary results have shown the perspective of, as well as a major drawback to, a ZnO nanowire array being developed into a cold electron source to be used in future electronic devices. (c) 2006 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000243851800013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Nanoscience & Nanotechnology; Physics, Condensed Matter; SCI(E); EI; 39; ARTICLE; 1; 86-91; 36
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/251126]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Wang, Weiwei,Zhang, Gengmin,Yu, Ligang,et al. Field emission properties of zinc oxide nanowires fabricated by thermal evaporation[J]. physica e low dimensional systems nanostructures,2007.
APA	Wang, Weiwei,Zhang, Gengmin,Yu, Ligang,Bai, Xin,Zhang, Zhaoxiang,&Zhao, Xingyu.(2007).Field emission properties of zinc oxide nanowires fabricated by thermal evaporation.physica e low dimensional systems nanostructures.
MLA	Wang, Weiwei,et al."Field emission properties of zinc oxide nanowires fabricated by thermal evaporation".physica e low dimensional systems nanostructures (2007).