Synthesis and atmospheric pressure field emission operation of W18O49 nanowires

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Abstract

Tungsten oxide W18O49 nanorods with diameters of 15−20 nm were grown on tungsten thin films exposed to ethene and nitrogen at 700 °C at atmospheric pressure. It was found that tungsten carbide formation enhances nucleation and growth of nanorods. Atmospheric pressure field emission measurements in air showed a turn-on field of 3.3 V/μm and stable and reproducible emission current density (28 mA/cm2). At low current densities (<20 mA/cm2), the field emission current follows the Fowler−Nordheim model; saturation effects were observed above 20 mA/cm2.
Original languageUndefined
Pages (from-to)15183-15189
Number of pages7
JournalJournal of physical chemistry C
Volume112
Issue number39
DOIs
Publication statusPublished - 2008

Keywords

  • IR-94262
  • METIS-249751

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