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|
| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Event Hall |
| Time |
4월 19일 (목요일) 11:00~12:30 |
| Code |
INOR.P-115 |
| Subject |
Unraveling facet-selective electrodeposition process of Copper onto Ag nanocubes via plasmonic imaging techniques at single-particle level |
| Authors |
Hyuncheol Oh, Youngchan Park, Hyunjoon Song*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
|
| Abstract |
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. |
| E-mail |
uruarrest803@kaist.ac.kr |
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121st General Meeting of the KCS