Strategy for the syntheses of isolated fine silver nanoparticles and polypyrrole/silver nanocomposites on gold substrates

Yu Chuan Liu, Hsun Tsing Lee, Shung Jim Yang

研究成果: 雜誌貢獻文章

37 引文 斯高帕斯(Scopus)

摘要

In this work, isolated fine silver nanoparticles and polypyrrole/silver nanocomposites with diameters of about 10 nm on gold substrates were first prepared by electrochemical methods. First, an Ag substrate was cycled in a deoxygenated aqueous solution containing 0.1 M HCl from -0.30 to +0.30 V versus Ag/AgCl at 5 mV/s with 30 scans. Subsequently the Ag working electrode was immediately replaced by an Au electrode and a cathodic overpotential of 0.2 V was applied under controlled sonication to synthesize Ag nanoparticles on the Au electrode. Then pyrrole monomers were encouragingly found to be polymerized on the deposited Ag nanoparticles. This polymerization is distinguishable from the known chemical or electrochemical one, due to the electrochemical activity of unreduced species of Agn + clusters inside the nanoparticles. Also, this polymerization may be ascribed to the oxidizing agent of AuCl4 -, which is present on the Au electrode.

原文英語
頁(從 - 到)3441-3445
頁數5
期刊Electrochimica Acta
51
發行號17
DOIs
出版狀態已發佈 - 四月 25 2006
對外發佈Yes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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