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  • 09월 09일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제106회 대한화학회 학술발표회, 총회 및 기기전시회 Self-crystallization of fullerene

2010년 9월 24일 10시 37분 31초
INOR1-1 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 09시 : 00분
무기화학 - 에너지변환 광동력학
저자 및
포항공과대학교 화학과, Korea
Fullerene is a representative highly conjugated molecular system of which electronic configuration is well defined to behave as a semiconductor and superconductor when properly doped. To extend its vulnerability, geometrically well-defined structures are highly demanded not just for handling them easily during fabrication into electrical devices, but more importantly for modulation of their electrical or optical properties by defining how their neighborhood molecules are positioned. Self-crystallization is a powerful process that allows high definition single crystalline fullerene structures with high specificity in 1D, 2D, and 3D geometries. In this presentation, I will introduce two self-crystallization processes in vapor and solution phases that have successfully resulted in hexagonal C60 disks and wires, as well as C70 cubes. For the hexagonal C60 disks, a simple vaporization-condensation-recrystallization (VCR) process has been employed, and similar C60 disks and wires have been selectively obtained by choosing appropriate solvents in drop-drying process. In the case of C70 molecules, they are spontaneously self-crystallized into very homogeneous cube crystals by a simple precipitation process employing good solvent microcavities in poor solvent media. Together with the detail story of synthesis and structure characterizations, dramatic enhancement of photoluminescence property of C70 cubes will be also introduced.