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Water Oxidation under Modal Ultrastrong Coupling Conditions Using Gold/Silver Alloy Nanoparticles and Fabry-Perot Nanocavities
| Title: | Water Oxidation under Modal Ultrastrong Coupling Conditions Using Gold/Silver Alloy Nanoparticles and Fabry-Perot Nanocavities |
| Authors: | Suganami, Yoshiki Browse this author | | Oshikiri, Tomoya Browse this author →KAKEN DB | | Shi, Xu Browse this author →KAKEN DB | | Misawa, Hiroaki Browse this author →KAKEN DB |
| Keywords: | modal strong coupling | | nanostructures | | photochemistry | | surface plasmon resonance | | water oxidation |
| Issue Date: | 16-Aug-2021 |
| Publisher: | Wiley-Blackwell |
| Journal Title: | Angewandte chemie-international edition |
| Volume: | 60 |
| Issue: | 34 |
| Start Page: | 18438 |
| End Page: | 18442 |
| Publisher DOI: | 10.1002/anie.202103445 |
| Abstract: | We developed a photoanode consisting of Au-Ag alloy nanoparticles (NPs), a TiO2 thin film and a Au film (AATA) under modal strong coupling conditions with a large splitting energy of 520 meV, which can be categorized into the ultrastrong coupling regime. We fabricated a photoanode under ultrastrong coupling conditions to verify the relationship between the coupling strength and photoelectric conversion efficiency and successfully performed efficient photochemical reactions. The AATA photoanode showed a 4.0 % maximum incident photon-to-current efficiency (IPCE), obtained at 580 nm, and the internal quantum efficiency (IQE) was 4.1 %. These results were attributed to the high hot-electron injection efficiency due to the larger near-field enhancement and relatively negative potential distribution of the hot electrons. Furthermore, hybrid mode-induced water oxidation using AATA structures was performed, with a Faraday efficiency of more than 70 % for O-2 evolution. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/82496 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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