Strategy of fabricating enriched gold nanoparticles based on electrochemical methods

Fu Der Mai, Ting Chu Hsu, Yu Chuan Liu, Kuang Hsuan Yang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this work, we report a new and clean electrochemical pathway to prepare enriched gold nanoparticles in aqueous solutions via the aid of chitosan without addition of any other stabilizer and reductant. First, an Au substrate was cycled in a deoxygenated aqueous solution containing 0.1 N NaCl and 1 g/L chitosan from - 0.28 to + 1.22 V vs Ag/AgCl at 500 mV/s with 500 scans. Then the Au working electrode was immediately replaced by a Pt electrode, and a cathodic overpotential of 0.6 V from the open circuit potential (OCP) of ca. 0.84 V vs Ag/AgCl was applied under sonification to synthesize Au nanoparticles. Experimental results indicate the concentration and the particle sizes of prepared Au nanoparticles are ca. 50 ppm and 10 nm in diameter, respectively. No aggregation of Au nanoparticles is observed in an ambient atmosphere for at least 3 months.

Original languageEnglish
Pages (from-to)1788-1790
Number of pages3
JournalMaterials Letters
Volume65
Issue number12
DOIs
Publication statusPublished - Jun 30 2011

Keywords

  • Chitosan
  • Gold nanoparticles
  • Sonoelectrochemical synthesis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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