Synthesis and plasmonic properties of monodisperse Au-Ag alloy nanoparticles of different compositions from a single-source organometallic precursor

Julian Crespo, Andrea Falqui, Jorge García-Barrasa, José M. López-De-Luzuriaga, Miguel Monge*, M. Elena Olmos, María Rodríguez-Castillo, Matteo Sestu, Katerina Soulantica

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Monodisperse Au-Ag alloy nanoparticles of different compositions are prepared through the mild decomposition of the bimetallic precursor [Au 2Ag2(C6F5)4(OEt 2)2]n in an organic solvent using hexadecylamine (HDA) as a stabilizing ligand. The effects of different reaction parameters on the size and composition of the nanoparticles, such as the metal:HDA ratio, the use of H2 reducing gas or the solvent (toluene, THF or mesitylene), have been studied through TEM, HRTEM, EDS, UV/Vis and 19F NMR spectroscopy. The localized surface plasmon resonance (LSPR) displayed by the spherical Au-Ag nanoparticles can be tuned as a function of the metal composition.

Original languageEnglish (US)
Pages (from-to)2975-2984
Number of pages10
JournalJournal of Materials Chemistry C
Volume2
Issue number16
DOIs
StatePublished - Apr 28 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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