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학술발표회초록보기

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  • 02월 20일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제113회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Versatile Chip-Based Analytical Platforms Functionalized with Dendrimer-Encapsulated Nanoparticles

등록일
2014년 2월 19일 16시 00분 43초
접수번호
1309
발표코드
ANAL1-1 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 09시 : 20분
발표형식
심포지엄
발표분야
분석화학 - Advanced Bio and Environmental Analysis I: Sensor and Chip
저자 및
공동저자
김주훈
경희대학교 화학과, Korea
Here, we report on functionalization of chip surfaces with dendrimer-encapsulated nanoparticles (DENs) for fabrication of versatile chip-based analytical platforms. The surface functionalization method is electrochemical grafting of amine-terminated dendrimers encapsulating nanoparticles onto indium tin oxide (ITO) surface, which can be applied for electrochemiluminescence-based assays. Specifically, we prepared two different DENs, i.e. Pt and Au DENs, using amine-terminated sixth generation polyamidoamine dendrimers, and subsequently immobilized the DENs onto ITO surfaces via electrooxidative grafting of the terminal amines of dendrimers to the surfaces. Electrochemical experiments and X-ray photoelectron spectroscopy (XPS) confirmed that the DENs were electrochemically grafted onto the ITO surface and not just physisorbed. The resulting DEN-modified ITOs exhibited highly improved catalytic activity for electrochemical oxidation of Ru(bpy)32+ (bpy, 2,2’-bipyridine)/ tri-n-propylamine (TPrA), leading to significantly increased electrochemiluminescence (ECL) emission while preserving the good optical transparency of ITOs. We also describe briefly how the functionalized surfaces can be applied as electrochemical and ECL sensor chips.

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