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Ultrahigh Electron Emissive Carbon Nanotubes with Nano-sized RuO2 Particles Deposition |
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| Authors: | Ruth Knibbe Kazuhiro Nogita John Drennan Tsuneyuki Noguchi Katsuyoshi Tatenuma Pou Liu Fumihito Arai Eiji Yashima Michiru Nishiwaki Shigeki Kato |
| Institution: | (1) Department of Chemical Engineering, The University of Queensland, 50 Coopers Rd., St. Lucia, Brisbane, QLD, 4072, Australia;(2) The Graduate University for Advanced Studies, Ohho 1-1, Tsukuba Ibaraki, 305-0801, Japan;(3) KAKEN Inc., 1044 Hori, Mito Ibaraki, 310-0903, Japan;(4) Nagoya University, Nagoya 464-8603, Japan;(5) High Energy Accelerator Research Organization (KEK), Ohho 1-1, Tsukuba Ibaraki, 305-0801, Japan |
| Abstract: | 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. |
| Keywords: | field emission MWNT RuO2 electrical characteristics |
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