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  • 09월 06일 15시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제112회 대한화학회 학술발표회, 총회 및 기기전시회 안내 SERS Hot Spot Formation with Thiol Functionalized Cucurbit[n]uril

등록일
2013년 8월 29일 17시 01분 16초
접수번호
1203
발표코드
PHYS.P-407 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 16일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
김남훈, 신평식, 김기문*
포항공과대학교 화학과, Korea
We developed a new strategy for the generation of surface-enhanced Raman scattering (SERS) hot spots by anchoring a suitable target molecule in a close proximity to the metal surface/nanoparticle using the host-guest chemistry of cucurbit[6]uril (CB[6]). Two kinds of nano structures were prepared; the aggregation of Ag nanoparticles and Ag nanoparticles on an Ag substrate. The role of thiol-CB[6] is a linker which connects Ag nanoparticles or Ag nanoparticle and a bulk Ag surface with reproducible gap distance forming strong Ag-S bonds. Gap distance between Ag nanoparticles is close enough for a strong SERS signal. The structure of these nanostructures was investigated by transmission electron microscopy (TEM), atomic force microscopy (AFM), IR, UV-Vis spectroscopy, and X-ray photoelectron spectroscopy (XPS). IR and XPS measurements confirm the vertical geometry of thiol CB[6] on metal surface indicating that CB[6] pore is open. These open CB[6] pore can interact with several guest molecules very selectively generating very strong SERS signal of guest molecules. P-toluidine molecues were used as a guest molecule and a Raman report molecule. This system provides reproducible SERS hot spot having chemical selectivity via host-guest interaction of CB[6].

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