Modulating the photoelectrochemical response of titanium dioxide (TiO2) photoelectrodes using gold (Au) nanoparticles excited at different wavelengths

Gold (Au) nanoparticles (NPs) have been widely used to modulate the photoelectrochemical current of TiO2 photoelectrodes in energy conversion and sensing systems. Understanding the different mechanisms responsible for photocurrent modulation at different frequencies is important for building optimized photoelectrochemical systems. Herein, we investigated the photocurrent magnitude at different excitation wavelengths by varying Au NP …