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  • 08월 28일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Electric Conduction through Defective All Carbon Molecules

등록일
2008년 8월 12일 12시 45분 42초
접수번호
1425
발표코드
목11D5심 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 15시 : 50분
발표형식
심포지엄
발표분야
물리화학 - Symposium for Advanced Materials Physical Chemistry
저자 및
공동저자
윤완수, 김강현1, 우병칠
한국표준과학연구원 나노소자연구단, Korea
1고려대학교 전기공학과, Korea
In this talk, recent studies of our group on electrical conduction through all carbon molecules such as carbon nanotubes and graphene will be briefly discussed. Local nature of electric conduction in a carbon nanotube field-effect transistor was studied using scanning gate microscopy (SGM) and scanning surface potential microscopy (SSPM). Comparisons of the SGM images obtained at various gate voltages revealed that the gate hysteresis in the CNFET had substantial local variations along the CNT. The experimental results were explained by the inhomogeneous distribution of screening charges on the surroundings, which could be attributed to surface silanol groups as the major sources of the screening charges. In the case of graphene, exponential decrease in conductance and transconductance, enhancement of p-type nature, and rapid increase of low frequency noise were observed with increase of the defect density in graphene sheets. The experimental results were explained by the continuum percolation and the variable range hopping conduction.

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