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| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 18일 (목요일) 11:00~12:30 |
| Code |
INOR.P-39 |
| Subject |
In-situ single-particle plasmonic imaging of electrochemical facet-selective overgrowth of Cu onto Ag nanocubes |
| Authors |
Hyuncheol Oh, Hyunjoon Song*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
|
| Abstract |
The fabrication of bimetallic nanostructures through electrochemical methods has many advantages in catalysis and sensing due to their unique physical and chemical properties. However, it is very difficult to construct well-defined structures in the nanoscale region in this way. Herein, we investigated the facet-selective overgrowth of Cu ions onto energetically and kinetically active surfaces of silver nanocubes via spectroelectrochemistry and Matlab-coded image analysis. In a suitable chemical environment, Cu ions grow pseudomorphically in a flower-like morphology on the Ag cubes {111} surface as a function of applied potential. Nanostructuring with dendrimeric and cubic morphology is also possible by controlling only electrochemical conditions in the same chemical environment. Through our construction system and experimental conditions, a variety of Ag-Cu bimetallic nanostructures, which are very meaningful in catalysis, can be constructed. In addition, we obtained electrochemical and optical information simultaneously on growth process in real time at a single-particle level. Theoretical results of plasmon band using FDTD method provide the rationality of kinetic and mechanism analysis from correlation with experimental results. 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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123rd General Meeting of the KCS