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Thermal and Nonthermal Effects in Plasmon-Mediated Electrochemistry at Nanostructured Ag Electrodes |
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| Authors: | Dr Weihui Ou Dr Binbin Zhou Junda Shen Dr Tsz Wing Lo Prof Dangyuan Lei Dr Shengliang Li Jing Zhong Prof Yang Yang Li Prof Jian Lu |
| Institution: | 1. Hong Kong Branch of National Precious Metals Material Engineering Research Centre, Department of Material Science and Engineering, City University of Hong Kong, Hong Kong, 999077 China;2. Hong Kong Branch of National Precious Metals Material Engineering Research Centre, Department of Material Science and Engineering, City University of Hong Kong, Hong Kong, 999077 China
Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Tat Chee Avenue 83, Kowloon, Hong Kong, 999077 China Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077 China Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, 999077 China These authors contributed equally to this work.;3. Hong Kong Branch of National Precious Metals Material Engineering Research Centre, Department of Material Science and Engineering, City University of Hong Kong, Hong Kong, 999077 China Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Tat Chee Avenue 83, Kowloon, Hong Kong, 999077 China;4. Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, 999077 China;5. Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, 999077 China;6. Department of Chemistry, City University of Hong Kong, Hong Kong, 999077 China |
| Abstract: | Hot carriers (HCs) and thermal effects, stemming from plasmon decays, are crucial for most plasmonic applications. However, quantifying these two effects remains extremely challenging due to the experimental difficulty in accurately measuring the temperature at reaction sites. Herein, we provide a novel strategy to disentangle HCs from photothermal effects based on the different traits of heat dissipation (long range) and HCs transport (short range), and quantitatively uncover the dominant and potential-dependent role of photothermal effect by investigating the rapid- and slow-response currents in plasmon-mediated electrochemistry at nanostructured Ag electrode. Furthermore, the plasmoelectric surface potential is found to contribute to the rapid-response currents, which is absent in the previous studies. |
| Keywords: | Elektrochemie Heiße Ladungsträger Plasmoelektrische Effekte Oberflächenplasmonenresonanz Thermischer Effekt |