title: Plasmonic enhancements of photocatalytic activity of Pt/n-Si/Ag photodiodes using Au/Ag core/shell nanorods.
abstract: We report the plasmonic enhancement of the photocatalytic properties of Pt/n-Si/Ag photodiode photocatalysts using Au/Ag core/shell nanorods. We show that Au/Ag core/shell nanorods can be synthesized with tunable plasmon resonance frequencies and then conjugated onto Pt/n-Si/Ag photodiodes using well-defined chemistry. Photocatalytic studies showed that the conjugation with Au/Ag core/shell nanorods can significantly enhance the photocatalytic activity by more than a factor of 3. Spectral dependence studies further revealed that the photocatalytic enhancement is strongly correlated with the plasmonic absorption spectra of the Au/Ag core/shell nanorods, unambiguously demonstrating the plasmonic enhancement effect.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA.
authors.forename: Yongquan
authors.initials: Y
authors.lastname: Qu
authors.forename: Rui
authors.initials: R
authors.lastname: Cheng
authors.forename: Qiao
authors.initials: Q
authors.lastname: Su
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Duan
mesh_terms: D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D008027:Light; D046529:Microscopy, Electron, Transmission; D043942:Nanotubes / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance
chemical_list: D012834:Silver; D010984:Platinum; D006046:Gold; D012825:Silicon