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대한화학회 제105회 학술발표회 및 총회 Synthesis and Surface-Enhanced Raman Scattering of Triangular Gold and Noble Metal Core-Shell Nanoprisms

등록일
2010년 2월 17일 10시 19분 43초
접수번호
0282
발표코드
39P200포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
Dickson Joseph, K. E. Geckeler1
광주과학기술원 신소재공학과, India
1광주과학기술원 신소재공학과,나노바이오전자재료공학과, Germany
Surface-enhanced Raman scattering (SERS) integrates high levels of sensitivity with spectroscopic precision, and thus, has tremendous potential for chemical and biomolecular sensing. In this regard gold-silver core-shell triangular nanoprisms (TNs) have been prepared from gold nanoprisms by using a two-step method. Firstly, triangular gold nanoprisms were prepared by reducing potassium tetrachloroaurate in an alkaline solution of cyclodextrin in the presence of Tween 80. Subsequently, the gold-silver core-shell TNs were synthesized from silver and ascorbate ions using the Au TNs as the seeds in the presence of poly(1-vinyl-2-pyrrolidone). In addition to the Au-Ag bimetallic TNs, gold-palladium and gold-platinum TNs were also synthesized using the same procedure. The bimetallic Au-Ag core-shell triangular nanoprisms containing a silver shell provide an elegant and powerful SERS-active substrate when compared to the corresponding monometallic Au nanoprisms. The enhanced surface Raman scattering signals were attributed to the local field enhancement in the core-shell structure.

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