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  • 09월 01일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Plasmonic engineering of ~1 nm intra-nanogap embedded nanostructures for biomedical SERS nanoprobes [동우화인켐㈜ 포스터상]

2016년 9월 6일 11시 05분 12초
MAT.P-641 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 14일 (금요일) 11:00~12:30
저자 및
오정욱, 남좌민*
서울대학교 화학부, Korea
Plasmonic nanogap has been receiving extensive attention due to the extraordinary enhancement of plasmonic coupling in this very narrow region. In general, the localized surface plasmon coupling in the nanogap is greatly enhanced with the reduction of nanogap thickness. However, this trend collapses in the region of < 0.5 nm due to the quantum tunneling effect. For this reason, the synthesis of ~1 nm ultrasmall nanogap with high precision and uniformity, is particularly important for the development of ultrasensitive and quantitative SERS sensors. In recent years, we have developed ~1-nm intra-nanogap embedded gold nanoparticles (AuNPs) with nanobridges between Au core and Au shell, which produced strong (enhancement factor >108) and highly homogeneous and reproducible SERS signals. Interestingly, ~1-nm intra-nanogap inside these Au-nanobridged nanogap particles (Au-NNPs) can be controlled by sequence and grafting density of the DNA strands modified on core AuNPs, which enable to change the features of plasmonic coupling and SERS. In addition, the SERS intensity of Au surface roughness-controlled nanobridged nanogap particles (Au-RNNPs) was ~1 order greater than that of Au-NNPs with smooth surface. Our synthetic strategies and results provide useful guideline to design and synthesize plasmonic nanostructures with nanogap and utilize these structures for optics and biomedical applications.