Work

Quadrupolar Response of Plasmonic Photocathode Fabricated by Coating Electrodeposited Ag Nanoparticles with TiO2

Year: 2025

Type: article

Abstract: Photoelectrodes based on plasmon-induced charge separation (PICS) often consist of Au nanoparticles (NPs) supported on an n-type semiconductor electrode and work as photoanodes.Meanwhile, there are fewer studies on plasmonic photocathodes fabricated by coating a plasmonic NP-modified electrode with the semiconductor.In the present study, plasmonic photocathodes in which Ag NPs electrodeposited on an indium tin oxide (ITO) electrode are covered with TiO2 (ITO/Ag/TiO2) were fabricated via a spray pyrolysis method.The photocathode exhibited efficient absorption and photocurrent responses derived from quadrupolar localized surface plasmon resonance (LSPR) mode.Since there are few studies on ITO/Ag/TiO2 photocathode and the quadrupole mode shows a smaller scattering/extinction ratio and longer lifetime than the dipolar mode, the insights obtained in the present study would lead to the design of highly efficient plasmonic photocathodes.

Source: Electrochemistry

DOI: 10.5796/electrochemistry.25-72072

Authors: Hiroyasu NISHI, Kouki HIRANO, Nozomi YAMAMOTO

Institution: University of Toyama

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,130

Funder: Japan Society for the Promotion of Science