Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Characterization of microtip emitters based on titanium carbide-coated carbon nanotubes

티타늄 카바이드가 코팅된 탄소나노튜브 미세팁 이미터의 전계방출 특성 분석

  • Kim, Young-Kwang (Dept. of Electronic, Electrical, Control and Instrumentation Engineering, HanYang University) ;
  • Kim, Jong-Pil (Dept. of Electronic, Electrical, Control and Instrumentation Engineering, HanYang University) ;
  • Park, Chang-Kyun (Dept. of Electronic, Electrical, Control and Instrumentation Engineering, HanYang University) ;
  • Park, Jin-Seok (Dept. of Electronic, Electrical, Control and Instrumentation Engineering, HanYang University)
  • 김영광 (한양대학교 전자전기제어계측 공학과) ;
  • 김종필 (한양대학교 전자전기제어계측 공학과) ;
  • 박창균 (한양대학교 전자전기제어계측 공학과) ;
  • 박진석 (한양대학교 전자전기제어계측 공학과)
  • Published : 2008.07.16
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Abstract

Thin films (< 30 nm) of titanium carbide (TiC) are coated on carbon nanotubes (CNTs), which are directly grown on nano-sized ($\sim$ 500 nm in diameter) conical-type tungsten (W) tips, by employing an inductively coupled plasma-chemical vapor deposition (ICP-CVD) technique. Any modification in structural properties (such as length to diameter ratio, crystal quality, and growth behavior) of CNTs due to TiC-coating has been monitored by using high-resolution TEM, field-emission SEM, and Raman spectroscopy. Driving voltage for obtaining the same level of emission current in CNTs-emitter is significantly reduced by TiC-coating. It is also worthy of being noted that the degradation of emission current due to prolonged operation (up to 30 h) is remarkably suppressed by TiC-coating.

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