Field Emission of Individual Carbon Nanotubes and its Improvement by Decoration with Ruthenium Dioxide Super-Nanoparticles
Pou Liu*, Fumihito Arai*, Lixin Dong**,
Toshio Fukuda*, Tsuneyuki Noguchi***,
and Katsuyoshi Tatenuma***
*Department of Micro-Nano Systems Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
**Institute of Robotics and Intelligent Systems, Swiss Federal Institute of Technology (ETH), CLA H 17.2, ETH-Zentrum, Tannenstrasse 3, CH-8092 Zürich, Switzerland
***KAKEN Inc., Hori-cho, Mito, Ibaraki 310-0903, Japan
To reduce energy consumption by carbon nanotubes (CNTs) used as emitters in applications such as field emission display, and electron-beam-induced deposition (EBID), nano-sized metallic super-nanoparticles of ruthenium dioxide are decorated on the surface of CNTs. We studied field emission properties and found that the work voltage is 23% lower than that of as-grown CNT emitters. To obtain conductive nanostructures, electron-beam-induced deposition using an individual multiwalled carbon nanotube (MWNT) emitter decorated with ruthenium dioxide is realized by introducing tungsten hexacarbonyl (W(CO)6) as a precursor. The tungsten mass in deposits is rich at 98.89% as determined by energy x-ray dispersive spectrometer (EDS). We thus obtained nearly pure-metal deposits.
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