The effect of surface roughness on the plasmonic response of individual sub-micron gold spheres

Jessica Rodríguez-Fernández; Alison M. Funston; Jorge Pérez-Juste; Ramón A. Álvarez-Puebla; Luis M. Liz-Marzán; Paul Mulvaney

doi:10.1039/B905200N

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Physical Chemistry Chemical Physics

Issue 28, 2009

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The effect of surface roughness on the plasmonic response of individual sub-micron gold spheres

Jessica Rodríguez-Fernández , Alison M. Funston , Jorge Pérez-Juste , Ramón A. Álvarez-Puebla , Luis M. Liz-Marzán and Paul Mulvaney

Phys. Chem. Chem. Phys., 2009, 11, 5909-5914

DOI: 10.1039/B905200N
Received 13 Mar 2009, Accepted 08 Apr 2009
First published on the web 15 May 2009
This article is part of the collection: Nanophotonics: Plasmonics and metal nanoparticles and Web Collection: Surface-Enhanced Raman Scattering (SERS)

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Nanoscale surface corrugation strongly determines the plasmonic response of gold nanoparticles with dimensions of several tens of nanometres. Scattering spectra of individual spheres with a rough surface were found to red-shift and broaden. The plasmon modes exhibited quadrupole damping, in contrast to particles with smooth surfaces. Additionally, rougher spheres display a higher SERS activity, which demonstrates the crucial role of nanoscale surface texturing on the plasmonic response of gold particles.

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Representative TEM micrographs and size distributions of thespherical Au colloids studied by DFM/SEM
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Jessica Rodríguez-Fernández
Alison M. Funston
Jorge Pérez-Juste
Ramón A. Álvarez-Puebla
Luis M. Liz-Marzán
Paul Mulvaney

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Physical Chemistry Chemical Physics

The effect of surface roughness on the plasmonic response of individual sub-micron gold spheres

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