한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제40권11호
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  • Pages.1004-1009
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  • 2012
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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그래핀을 이용한 탄소나노튜브 전계방출소자 계면 개질 및 전자 추진계 응용

The use of Interfacial Graphene to Carbon nanotube Point emitter for Field Emission Electric Propulsion

  • 이정석 (서울대학교 기계항공공학부) ;
  • 강태준 (부산대학교 나노메카트로닉스공학과) ;
  • 김대원 (부산대학교 기계공학부) ;
  • 김용협 (서울대학교 기계항공공학부, 항공우주신기술연구소)
  • 투고 : 2012.09.01
  • 심사 : 2012.09.21
  • 발행 : 2012.11.01
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초록

탄소나노튜브는 우수한 전기적 특성과 전계를 집중시킬 수 있는 높은 종횡비 그리고 뛰어난 열적 안정성 때문에, 높은 전류밀도와 낮은 구동전압 그리고 긴 수명시간과 같은 우수한 전계 방출 특성을 구현할 수 있는 재료이다. 탄소나노튜브를 이용하여 전계방출원을 제작하기 위해서는 금속전극에 탄소나노튜브를 고정시켜야 한다. 이때 금속과 탄소나노튜브 사이의 접촉문제가 필수적인데, 본 실험에서는 그래핀을 계면으로 사용함으로써 본 문제를 해결하였다. 이러한 시도는 금속과 탄소나노튜브 사이에 우수한 전기적 열적 계면을 형성함으로써 기존 전계방출원보다 뛰어난 전계방출 성능을 얻을 수 있게 하였다. 본 연구를 통해 탄소나노튜브 전계방출원을 전자 추진원으로의 응용이 기대된다.

Carbon nanotube are nanostructure with extraordinary field emission properties like high current density, low driving voltage and long time stability, because of their high electrical conductivity, high aspect ratio for geometrical field enhancement and superior thermal stability. But, there is some problem to mate metal and carbon nanotube, we have resolved this problem by using interfacial graphene. This approach takes advantage of superior electric and thermal conductivity between metal and carbon nanotube and shows superior performance compared to the existing field emitters. This result shows that such a carbon nanotube emitter in a stage where it can be used for Field Emission Electric Propulsion (FEEP).

키워드

참고문헌

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