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3 October 2024 Effect of adhesive layer on electron injection from plasmonic nanoparticles into titanium oxide under strong coupling condition
Hiroaki Misawa
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Proceedings Volume PC13111, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXII; PC131110V (2024) https://doi.org/10.1117/12.3027399
Event: Nanoscience + Engineering, 2024, San Diego, California, United States
Abstract
We fabricated titanium oxide electrodes with nanocavity functionality and supported gold nanoparticles on them to form a strong coupling between localized surface plasmon resonance (LSPR) mode of the gold nanoparticles and the nanocavity mode. This resulted in successful absorption of a broad range of visible wavelengths. When using the electrodes with modal strong coupling, we observed an increased internal quantum yield of photocurrent generation using water as an electron source compared to plasmonic electrodes without nanocavity. Furthermore, we elucidated that the mechanism behind this enhancement involves quantum coherent interactions of multiple LSPRs via the nanocavity. Here, we report the use of metallic titanium as an adhesion layer between the nanocavity and gold nanoparticles, leading to an increase in electron injection into titanium oxide and provide further insights into the underlying mechanism.
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Hiroaki Misawa "Effect of adhesive layer on electron injection from plasmonic nanoparticles into titanium oxide under strong coupling condition", Proc. SPIE PC13111, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXII, PC131110V (3 October 2024); https://doi.org/10.1117/12.3027399
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KEYWORDS
Gold nanoparticles
Titanium
Oxides
Quantum plasmonics
Adhesives
Electrodes
Localized surface plasmon resonances
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