We have used gold nanostructures to excite various plasmonic modes such as multi-scattering, hot electron injection (HEI) and plasmon-induced resonant energy transfer (PIRET). Together they enable to enhance the utilization of solar light for photocatalytic processes. Detailed experimental and mechanism studies have been conducted to examine the plasmonic enhancement in photocurrent, photodegradation and total water splitting. Our work may find potential applications in optical redox-based sensors and green energy.
Acknowledgement: This work is supported by Research Grants Council (RGC) of Hong Kong (15221919, 15215620, N_PolyU511/20) and The Hong Kong Polytechnic University (1-ZE14, 1-ZVGH and 1-CD4V). The technical assistance and facility support of the Materials Research Centre (MRC) and the University Research Facility in Material Characterization and Device Fabrication (UMF) of The Hong Kong Polytechnic University are acknowledged.
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