The Fault in Their Shapes: Investigating the Surface-Plasmon-Resonance-Mediated Catalytic Activities of Silver Quasi-Spheres, Cubes, Triangular Prisms, and Wires

Anderson G M da Silva; Thenner S Rodrigues; Jiale Wang; Liliam K Yamada; Tiago V Alves; Fernando R Ornellas; Rômulo A Ando; Pedro H C Camargo

doi:10.1021/acs.langmuir.5b02838

The Fault in Their Shapes: Investigating the Surface-Plasmon-Resonance-Mediated Catalytic Activities of Silver Quasi-Spheres, Cubes, Triangular Prisms, and Wires

Langmuir. 2015 Sep 22;31(37):10272-8. doi: 10.1021/acs.langmuir.5b02838. Epub 2015 Sep 10.

Authors

Anderson G M da Silva¹, Thenner S Rodrigues¹, Jiale Wang¹, Liliam K Yamada¹, Tiago V Alves¹, Fernando R Ornellas¹, Rômulo A Ando¹, Pedro H C Camargo¹

Affiliation

¹ Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, São Paulo, Brazil.

PMID: 26335725
DOI: 10.1021/acs.langmuir.5b02838

Abstract

The surface-plasmon-resonance (SPR)-mediated catalytic activities of Ag and Au nanoparticles have emerged a relatively new frontier in catalysis in which visible light can be employed as an eco-friendly energy input to drive chemical reactions. Although this phenomenon has been reported for a variety of transformations, the effect of the nanoparticle shape and crystalline structure on the activities remains unclear. In this paper, we investigated the SPR-mediated catalytic activity of Ag quasi-spheres, cubes, triangular prisms, and wires toward the oxidation of p-aminothiophenol to p,p'-dimercaptoazobenzene by activated O2. The activities at 632.8 nm excitation followed the order triangular prisms and quasi-spheres > wires ≫ cubes. These results indicated that the shape, optical properties, and crystal structure played an important role in the detected SPR-mediated activities.