Ultrahigh electron emissive carbon nanotubes with nano-sized RuO2 particles deposition

Ruth Knibbe, Kazuhiro Nogita, John Drennan, Tsuneyuki Noguchi, Katsuyoshi Tatenuma, Pou Liu, Fumihito Arai, Eiji Yashima, Michiru Nishiwaki, Shigeki Kato

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Multi-wall carbon nanotubes (MWNTs) have a great commercial potential as electron field emitters, but suffer from fundamental problems such as stability and brightness. By depositing the MWNTs with nano-sized ruthenium dioxide (RuO2) particles, a new high performance emitter has been developed. When compared to MWNTs, the MWNTs impregnated with 1-2 nm sized RuO2 have superior and more efficient electrical characteristics. MWNTs supported by a silicon substrate showed a reduction in the onset voltage from 5.4 to 4 V/μm after RuO2 impregnation. The long-term stability of the impregnated MWNTs is also demonstrated with only a 20% increase in applied voltage required after 700 h operation at 40 mA/cm2.

Original languageEnglish
Pages (from-to)1201-1204
Number of pages4
JournalJournal of Nanoparticle Research
Issue number6
Publication statusPublished - Dec 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics


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