abs

학술발표회초록보기

초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 02월 22일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Silanization of Polyelectrolyte-Coated μAg Particles to Stabilize Raman Tagging Molecules

등록일
2008년 2월 11일 13시 08분 04초
접수번호
0283
발표코드
29P59포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 <발표Ⅰ>
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
이향봉, 신권수1, 김관
서울대학교 화학부,
1숭실대학교 화학과,
Micrometer-sized Ag (μAg) powders are very efficient surface-enhanced Raman scattering (SERS) substrates. To use μAg powders as a core material for molecular sensors operating via SERS, it is necessary to stabilize the tagging molecules adsorbed onto them. We demonstrate in this work that once the tagging molecules are coated with aliphatic polyelectrolytes such as poly(allylamine hydrochloride), the base-catalyzed silanization can be readily carried out to form stable silica shells around the polyelectrolyte layers by a biomimetic process; any particle can therefore be coated with silica since polyelectrolytes can be deposited beforehand via a layer-by-layer deposition method. Even after the silanization, the SERS peaks of marker molecules on Ag particles are the only observable peaks, since aliphatic polyelectrolytes, as well as silica shells, are intrinsically weak Raman scatterers and, more importantly, the SERS signals must derive mostly from the first layer of the adsorbates, i.e. the marker molecules, in direct contact with the μAg particles

상단으로