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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Plasmonic Hybrid Nanosystem based on Localized Surface Plasmon Resonance for Molecular Detection

2018년 2월 7일 14시 24분 54초
ANAL1-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 17시 : 30분
Analytical Chemistry - Recent Advances in Analytical Chemistry I: Optical Sensor Platform Based Nanobio Materials
저자 및
Seunghyun Lee
Department of Nanochemistry, Gachon University, Korea
Nobel metal nanoparticles with different sizes and shapes have attracted a great deal of recent interest due to their unique optical properties as a result of localized surface plasmon resonances (LSPR) which produces a strong optical extinction which can be tuned throughout the visible and near-infrared wavelengths. The LSPR of plasmonic nanoparticles can serve as potential sensor substrates for the label-free sensing of a range of targets. It has also been shown that near-field enhancements at the sharp plasmonic edges and strengthening of inter-particle optical coupling, critical for signal enhancement can be observed due to LSPR. We have fabricated substrates coated with these particles, and used their dielectric sensitivity to create an optical refractive index sensor based on a spectral extinction measurement and show that gold nanorods and bipyramids can be used as a label-free immunoassay for biological sensing. Also, a surfactant cetyltrimethylammonium bromide (CTAB) directs the synthesis of plasmonic gold nanoparticles to produce monodisperse nanoparticle shapes from small gold seed particles. The nature of the CTAB layer is therefore of considerable interest, since it is the key to understanding CTAB directed synthesis. Therefore, we use surface enhanced Raman spectroscopy (SERS) to probe the structure of the CTAB bilayer on gold nanorod. Lastly, hot electron injection into an exceptionally high mobility material can be realized in carbon–plasmonic hybrid nanosystems, which can be exploited for several front-edge applications including photovoltaics and molecular sensing at trace levels. Here, SERS-active substrates with plasmonic-carbon hybrid nanostructures for molecular detections will be also discussed.