Field emission from zinc oxide nanoneedles on plastic substrates

H. Y. Yang, Shu Ping Lau, Siu Fung Yu, L. Huang, M. Tanemura, J. Tanaka, T. Okita, H. H. Hng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

64 Citations (Scopus)

Abstract

The electron field emission from zinc oxide (ZnO) nanoneedles on flexible plastic substrates is reported. ZnO thin films were first deposited on plastic substrates at 200 °C using a filtered cathodic vacuum arc technique; the films were then bombarded by Ar+ ion. After ion beam irradiation, high-density ZnO nanoneedle arrays were selectively formed on the thin films. The average diameter and length of the ZnO nanoneedles is around 100 and 700 nm respectively. Field emission measurement showed a fairly low threshold voltage of 4.1 V νm-1 with a current density of 1 νA cm-2. The emission current density can be as high as 1 mA cm-2 at 9.6 V νm-1. The result establishes a method of fabricating a flexible field emitter, which should find practical applications in vacuum electronic devices.
Original languageEnglish
Pages (from-to)1300-1303
Number of pages4
JournalNanotechnology
Volume16
Issue number8
DOIs
Publication statusPublished - 1 Aug 2005
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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