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  • 03월 05일 13시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제105회 학술발표회 및 총회 Self-Assembly of Nanoparticles into Twisted Ribbons with Light-Controlled Pitch

등록일
2010년 2월 17일 16시 26분 01초
접수번호
0420
발표코드
금27H7구 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 16시 : 10분
발표형식
구두발표
발표분야
물리화학 - 물리화학에서의 최근 연구
저자 및
공동저자
김상현, 김기섭
충주대학교 화공생물공학과, Korea
Helical structures are among the most ubiquitous in nature due to their unique properties. They are typically produced by the self-assembly of common building blocks of living matter: proteins, amino acids, and oligonucleotides. Like these building blocks, CdTe nanoparticles biomimetically self-assemble into structures that form twisted ribbons. The mechanism of this process is elucidated in detail using both experiments and computer simulation. The pitch of the produced twisted ribbons is controlled by the intensity of illumination in the visible region due to the gradual increase of mechanical stress in the ribbon with greater illumination intensity, which is alleviated by twisting. Beyond biomimicry, the fundamental importance of this study includes: (1) the first demonstration of many-body cooperative processes in a nanoparticle system driven by oxidative evolution of the individual CdTe nanocrystals, and (2) a novel optical effect in nanostructures. This study also demonstrates a viable pathway for the fabrication of nanomaterials possessing helical conformation with fine control of their geometry.

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