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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Edge-functionalized graphite

등록일
2012년 2월 22일 15시 05분 18초
접수번호
1335
발표코드
IND1-2 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 10시 : 30분
발표형식
심포지엄
발표분야
공업화학 - Carbon Materials Chemistry
저자 및
공동저자
백종범
울산과학기술대학교 친환경에너지공학부, Korea
High-yield “direct” exfoliation of graphite has so far remained a challenge to graphene research community. Here, we demonstrate a “direct” covalent attachment of organic molecular wedges to the edges of pristine graphite instead of graphite oxide (GO). The approach is the first case of “direct” functionalization of pristine graphite and a step toward high-yield exfoliation of three-dimensional graphite into two-dimensional graphene sheets. The resultant edge-selectively functionalized graphite is readily dispersible in common organic solvents with a concentration in the range of 0.27-0.80 mg/mL. The improved dispersibility is driven by a strong interaction between the polar functional groups on graphite and the polar solvent. The resistance of resultant graphene films upon solution cast and subsequent heat-treatments is 0.5-3 kΩ/sq with 65-95 % of optical transmittance, whose value is several orders of magnitude better than reduced GO (rGO). Our findings suggest that the edge-selectively functionalized graphite can be prepared and conveniently used as base materials for a wide range of applications from wet chemistry to device applications.

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