SERS-active Ag/Au bimetallic nanoalloys on Si/SiOx Journal Articles

abstract

• Nanoalloys are clusters formed of two or more metallic elements and are of interest for applications in catalysis, spectroscopy, photonics, electronics, and magnetism. The hybridization of the individual plasmonic absorptions of different alloyed metals allows for plasmon tunability and a better coupling of plasmon-excitation line, giving rise to significant increases in the enhancement factor for surface-enhanced Raman scattering (SERS) spectroscopy. Here we report simple fabrication procedures for the preparation of Ag/Au nanoalloys on Si/SiO(x) substrates, with tunable plasmon resonances. The mechanism and kinetic of the nanoalloy formation and its optical properties were studied by SEM, XPS, SPR, and SERS.

authors

• Alvarez-Puebla, Ramón
• Vásquez, Juan
• Cheben, Pavel
• Xu, DanXia
• Waldron, Philip
• Fenniri, Hicham

status

• published 

publication date

• March 2009

has subject area

• 02 Physical Sciences (FoR)
• 03 Chemical Sciences (FoR)
• 09 Engineering (FoR)
• Alloys (MeSH)
• Chemical Physics (Science Metrix)
• Gold (MeSH)
• Nanostructures (MeSH)
• Particle Size (MeSH)
• Silicon (MeSH)
• Silicon Dioxide (MeSH)
• Silver (MeSH)
• Spectrum Analysis, Raman (MeSH)
• Surface Properties (MeSH)

published in

• Journal of Colloid and Interface Science  Journal

keywords

• Alloys
• Gold
• Nanostructures
• Particle Size
• Silicon
• Silicon Dioxide
• Silver
• Spectrum Analysis, Raman
• Surface Properties

Digital Object Identifier (DOI)

• 10.1016/j.jcis.2009.01.070

PubMed ID

• 19251268

start page

• 237

end page

• 41

volume

• 333

issue

• 1