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  • 09월 12일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제110회 대한화학회 학술발표회, 총회 및 기기전시회 Syntheses and Applications of Plasmonic Nanogap Structures

2012년 9월 13일 11시 02분 47초
INOR.O-1 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 10시 : 00분
무기화학 - General Oral Presentation
저자 및
서울대학교 화학부, Korea
Synthesizing and controlling plasmonic nanostructures such as Au and Ag nanoparticles (AuNPs and AgNPs) with high precision and high yield are of paramount importance in optics, nanoscience and materials science. It is particularly important to generate and control ~1-nm plasmonic gap because plasmonic gaps of ~1 nm or less can generate exponentially stronger plasmonic coupling signals than >1-nm plasmonic gap. Among many examples of the use of plasmonic nanogap, surface-enhanced Raman scattering(SERS)-based signal amplification and bio-detection methods using SERS-active plasmonic nanoparticles (NPs) have been drawing significant interest, and it has been known that SERS effect is intense when Raman dyes are located within <1-nm inter-particle junction. However, these SERS-active NPs and SERS-active NP-based detection strategies have not been practically useful because there is no straightforward method to synthesize desired SERS-active nanostructures in a high yield, great precision and nm-level controllability. For these reasons, reproducible and quantitative SERS signal generation from SERS probes is very challenging and the widespread and practical use of SERS nanoprobes has been largely limited. Here, I will describe DNA-based synthetic strategies to build up new types of plasmonic nanogap Au/Ag structures with high structural controllability. The use of these plasmonic nanostructures as excellent optical signal enhancement platforms to address the above-mentioned issues in SERS will be mainly shown especially for ~1-nm plasmonic gap.