Synthesis and Characterization of Gold/Polypyrrole Core-Shell Nanocomposites and Elemental Gold Nanoparticles Based on the Gold-Containing Nanocomplexes Prepared by Electrochemical Methods in Aqueous Solutions

Yu Chuan Liu, Thomas C. Chuang

Research output: Contribution to journalArticle

126 Citations (Scopus)

Abstract

We report here the first electrochemical pathway to prepare Au-containing nanocomplexes with the mean diameter of 2 nm in 0.1 N KC1 aqueous solutions without addition of any stabilizer. Encouragingly, polypyrrole-(PPy-) coated gold nanocomposites with a core-shell structure and a diameter smaller than 8 nm can be prepared by the formation of self-assembled monolayers and further orderly autopolymerization of pyrrole monomers on these nanocomplexes. The prepared Au/PPy nanocomposites should exhibit extremely high conductivity, as indicated by the analyses of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and surface-enhanced Raman scattering (SERS). Meanwhile, elemental Au(0) nanoparticles of a mean diameter of 5 nm can be obtained by treating the Au/PPy-nanocomposites-containing solution with sonification.

Original languageEnglish
Pages (from-to)12383-12386
Number of pages4
JournalJournal of Physical Chemistry B
Volume107
Issue number45
Publication statusPublished - Nov 13 2003
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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