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  • 03월 04일 13시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Two Step Self- Assembled Nano-clusters for Surface Enhanced Raman Substrate

등록일
2005년 2월 17일 13시 33분 34초
접수번호
0879
발표코드
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발표시간
토 <발표Ⅲ>
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
국은예, 정대홍
서울대 화학교육과,
SERS (Surface-Enhanced Raman Scattering) refers to the phenomenon that for certain molecules adsorbed on specially prepared metal surfaces a Raman scattering is observed with intensity increased by a factor of 105~106. It is now largely understood that in a number of systems SERS is a highly heterogeneous process due to local enhancements at “hot spots” reaching values ~1011. Two classes of systems seem capable of producing such super-hot sites: nanoparticle dimers and small aggregates in which interstitial sites are the super-enhancing locations, and large fractal aggregates. However, the local structures for hot spot are very heterogeneous and unpredictable. Armed with this knowledge, we begin to apply the methods of nanoscience and technology to fabricate systems with well-characterized structures engineered to produce enhancements, routinely and predictively, large enough for near single-molecule SERS detection. In this study, we report the 2-D local clustering nanoparticles on silicon wafer surfaces.

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