Field Emission Properties of Single-Walled Carbon Nanotubes with a Variety of Emitter Morphologies
| Autor: | Shigeo Maruyama, Koji Furuichi, Suguru Noda, Yoshiko Tsuji, Zhengyi Zhang, Hisashi Sugime, Yosuke Shiratori, Yukio Yamaguchi |
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| Rok vydání: | 2008 |
| Předmět: |
Fabrication
Materials science Physics and Astronomy (miscellaneous) business.industry General Engineering General Physics and Astronomy Nanotechnology Carbon nanotube Anode law.invention Condensed Matter::Materials Science Field electron emission symbols.namesake law Physics::Atomic and Molecular Clusters symbols Optoelectronics business Raman spectroscopy Luminescence Common emitter Diode |
| Zdroj: | Japanese Journal of Applied Physics. 47:4780-4787 |
| ISSN: | 1347-4065 0021-4922 |
| DOI: | 10.1143/jjap.47.4780 |
| Popis: | Field emission properties of single-walled carbon nanotubes (SWCNTs), which were prepared through alcohol catalytic chemical vapor deposition for 10–60 s, were characterized in a diode configuration. Protrusive bundles at the top surface of samples act selectively as emission sites. The number of emission sites was controlled by emitter morphologies combined with texturing of Si substrates. SWCNTs grown on a textured Si substrate exhibited a turn-on field as low as 2.4 V/µm at a field emission current density of 1 µA/cm2. Uniform spatial luminescence (0.5 cm2) from the rear surface of the anode was revealed for SWCNTs prepared on the textured Si substrate. Deterioration of field emission properties through repetitive measurements was reduced for the textured samples in comparison with vertically aligned SWCNTs and a random network of SWCNTs prepared on flat Si substrates. Emitter morphology resulting in improved field emission properties is a crucial factor for the fabrication of SWCNT-electron sources. Morphologically controlled SWCNTs with promising emitter performance are expected to be practical electron sources. |
| Databáze: | OpenAIRE |
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