Zinc oxide nanowire based field emitters

Sivakumar Ramanathan, Yu Chun Chen, Yonhua Tzeng

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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 FowlerNordheim tunneling current indicate that the turn-on field is 15 V μm-1 and the field enhancement factor β calculated for two sets of samples turned out to be 670 and 1481, respectively (theoretical value for β in bulk ZnO is 205). The enhancement in β 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 currentvoltage characteristics of the wires are non-linear and show a rectifying behavior.

Original languageEnglish
Pages (from-to)285-288
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1
Publication statusPublished - 2010 Nov

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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