Gold/palladium and silver/palladium colloids as novel metallic substrates for surface-enhanced Raman scattering

New surface-enhanced Raman scattering (SERS) substrates, composed of gold or silver colloidal nanoparticles doped with palladium, were prepared. These novel colloids are stable and maintain a satisfactory SERS efficiency, even after long aging. The interest in doping the coinage metal nanoparticles...

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Published inApplied spectroscopy Vol. 59; no. 2; p. 194
Main Authors Pergolese, Barbara, Bigotto, Adriano, Muniz-Miranda, Maurizio, Sbrana, Giuseppe
Format Journal Article
LanguageEnglish
Published United States 01.02.2005
Subjects
Coated Materials, Biocompatible - analysis
Coated Materials, Biocompatible - chemistry
Colloids - analysis
Colloids - chemistry
Gold Colloid - analysis
Gold Colloid - chemistry
Materials Testing
Molecular Conformation
Nanotubes - analysis
Nanotubes - chemistry
Palladium - analysis
Palladium - chemistry
Particle Size
Scattering, Radiation
Silver - analysis
Silver - chemistry
Spectrum Analysis, Raman - methods
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Summary:New surface-enhanced Raman scattering (SERS) substrates, composed of gold or silver colloidal nanoparticles doped with palladium, were prepared. These novel colloids are stable and maintain a satisfactory SERS efficiency, even after long aging. The interest in doping the coinage metal nanoparticles with palladium is due to the well-known catalytic activity of this metal. Transmission electron microscopy (TEM) and ultraviolet-visible absorption spectroscopy were used to characterize the shape and size of the metal particles. It was found that these bimetallic colloidal nanoparticles have a core-shell structure, with gold or silver coated with palladium clusters.
ISSN:0003-7028
DOI:10.1366/0003702053085034