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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제121회 학술발표회 및 총회 Unraveling facet-selective electrodeposition process of Copper onto Ag nanocubes via plasmonic imaging techniques at single-particle level

2018년 2월 7일 10시 49분 05초
INOR.P-115 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Hyuncheol Oh, Youngchan Park, Hyunjoon Song*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
Plasmonic nanomaterials have been widely used in catalysis and sensing applications on account of their physical and chemical properties. However, obtaining optical information on surface reactions of individual nanoparticles has been a challenge experimentally. Herein, we exploit the facet-selective electrodeposition of Copper and alloying process on energetically active surface of silver nanocubes through spectroelectrochemistry, including matlab-coded multi-particle imaging analysis. These techniques enable for systematic approaches on a close understanding of surface reaction mechanism at single-particle level, without adverse effect by ensemble averaging and geometrical deviations. Using single–particle plasmon-voltammetry (spPV) obtained from differentiation of shift pattern of plasmon band according to electrochemical potential, we found electrochemical growth and alloying mechanism on Ag-Cu bimetallic system, in detail. The experimental results by electrochemical response are correlated with theoretical ones by FDTD simulations with potential-modified dielectric function, accounting for rationality on the kinetic and mechanism analysis. We explored the local distribution of electrochemical activities within a single nanocube, providing a great understanding on electrochemical bimetallic interconnection.