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학술발표회초록보기

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결제문의 member@kcsnet.or.kr

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

제113회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Quantum-Sized Metal Nanoclusters: A New Electrode Material for Electrochemical Sensing

등록일
2014년 2월 20일 11시 57분 46초
접수번호
1331
발표코드
ELEC1-2 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 10시 : 00분
발표형식
심포지엄
발표분야
전기화학 - Electrochemistry on New Electrode Materials I
저자 및
공동저자
이동일
연세대학교 화학과, Korea
Research on the chemistry and electrochemistry of atomically precise gold nanoclusters, for example, Au25, Au38, Au67, Au102 and Au144, has been extensively pursued in recent years. These nanoclusters exhibit novel electronic, optical and catalytic properties that differ substantially from the corresponding atoms or bulk materials. This presentation reports electrochemical and optical properties of these nanoclusters and their use in electrochemical sensing. Voltammetry of these nanoclusters exhibited well-resolved, reversible redox peaks and size-dependent electrochemical HOMO-LUMO gaps that could be correlated to optical and calculated energy gaps. These nanoclusters also showed excellent electrocatalytic activity toward oxidation of biologically relevant analytes. The modified electrode film prepared with Au25 nanoclusters exhibited excellent mediated electrocatalytic activity that was utilized for amperometric sensing of dopamine and glucose. The electron transfer dynamics in the Au25 film was examined as a function of Au25 concentration, which manifested the dual role of Au25 as an electronic conductor as well as a redox mediator. The electron transfer study has further revealed the correlation between the electronic conductivity of the Au25 film and the sensing sensitivity.

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