The energetic hot carriers, i.e. electrons and holes, generated during plasmon decay can be harnessed to drive or enhance a series of interesting photophysical and photochemical processes occurring on plasmonic nanoparticle surfaces. Here I will share with the audience several case studies, through which we have been able to gain important mechanistic insights regarding the detailed roles of plasmonic hot electrons and hot holes in driving the photocatalytic molecular transformations and photo-induced corrosion of anisotropic nanostructures. I will talk about how the plasmonic properties of deliberately designed nanostructures can be fine-tuned to optimize interfacial photochemical processes by focusing on three examples: (1) multimodal photocatalytic mineralization of organic dye molecules on Au@SnO<sub>2</sub> core-shell nanoparticles; (2) plasmon-enhanced enzyme-mimicking activity of Au surface-roughed nanoparticles; (3) plasmon-driven photo-corrosion of quasi-one-dimensional Au and Ag nanostructures.

Hot carriers in action: Plasmon-driven photocatalysis and photocorrosion

2019 Fall National Meeting

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