Plasmonic metal nanostructures can absorb visible light and generate hot electrons that facilitating further electrochemical reactions such as H2O2 synthesis. A metal–insulator–metal structure of Au nanoparticles on a ZnO/TiO2/Al film is designed and studied. JCMsuite was used to determine the best dielectric spacer thickness to maximize the Au absorption.
D. E. Willis, et al. Critical Coupling of Visible Light Extends Hot-Electron Lifetimes for H2O2 Synthesis. ACS Applied Materials & Interfaces, 12(20), 22778 (2020).