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

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Ultrafast Energy Transfer in Artificial Photosynthetic Complexes near Plasmonic Metal Nanoparticles

등록일
2012년 2월 16일 15시 20분 16초
접수번호
1032
발표코드
PHYS.P-463 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
이재범, 이인구1, 방윤수1
광주과학기술원 광공학응용물리, Korea
1광주과학기술원 광공학응용물리학과, Korea
Femtosecond transient absorption measurements in visible wavelengths have been used to investigate excited-state dynamics and energy transfer in cyanobacterial Photosystem 1 (PS1) dispersed in aqueous solution of plasmonic silver nanoparticles. PS1 is one of the most robust and efficient light-harvesting complexes in nature and consist of more than 110 co-factors including ~100 chlorophylls, ~20 carotenoids, 2 phylloquinone and 3 iron-sulfur clusters. PS1 clearly show different excited-state dynamics depending on excitation wavelength near silver nanoparticles which have absorption band centered at 430 nm. In order to find optimal nanoparticles in constructing artificial photosynthetic complexes, we synthesize various silver nanoparticles and nano-surfaces by chemical reduction. Ag nanoparticles of diameter in the wide range of 5~100 nm and of absorption maximum in the 380~460 nm range are synthesized in the form of colloidal particles and island films. Recent developments in nanoparticle synthesis and metal enhanced fluorescence measurement using rhodamine dyes will be presented. The current study will be extended to measurements of transient absorption and induced emissions from the excited states of chromophores and energy transfers or relaxations within simple artificial photosynthetic complexes made of chromophores and metal nanoparticles will be investigated.

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