Field emission properties of metal oxide nanowires

Victor I. Kleshch, Simas Rackauskas, Albert G. Nasibulin, Esko I. Kauppinen, Elena D. Obraztsova, Alexander N. Obraztsov

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The metal oxide nanowires were produced by a resistive heating of various metals under ambient conditions at normal atmospheric pressure. The obtained nanowires of CuO, V 2O 5, ZnO, Fe 2O 3 were typically of 1-5 μm in length and 10-50 nm in diameter. Field emission properties of the oxidized metal surfaces covered by the nanowires, including current-voltage dependencies and distribution of the emission sites, were measured in a flat diode configuration with the use of a phosphor coated anode. The obtained data on field emission properties were compared with the structural characteristics of the nanowires. The highest efficiency of field emission (with 5 V/μm threshold field at 0.01 mA/cm 2 current density) was observed for CuO nanowires. Obtained maximal current density (up to 100 mA/cm 2) for such kind of cathodes is very promising for various applications in vacuum electronics.

Original languageEnglish
Pages (from-to)35-40
Number of pages6
JournalJournal of Nanoelectronics and Optoelectronics
Volume7
Issue number1
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • Field Emission
  • Metal Oxide
  • Nanowire
  • Resistive Heating
  • Vacuum Electronics

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