Deposition of gold nanoparticles on silica spheres by electroless metal plating technique

Yoshio Kobayashi, Yohei Tadaki, Daisuke Nagao, Mikio Konno

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

A previously proposed method for metal deposition with silver [Kobayashi et al., Chem. Mater. 13 (2001) 1630] was extended to uniform deposition of gold nanoparticles on submicrometer-sized silica spheres. The present method consisted of three steps: (1) the adsorption of Sn2+ ions took place on surface of silica particles, (2) Ag+ ions added were reduced and simultaneously adsorbed to the surface, while Sn2+ was oxidized to Sn4+, and (3) Au+ ions added were reduced and deposited on the Ag surface. TEM observation, X-ray diffractometry, and UV-vis absorption spectroscopy revealed that gold metal nanoparticles with an average particle size of 13 nm and a crystal size of 5.1 nm were formed on the silica spheres with a size of 273 nm at an Au concentration of 0.77 M.

Original languageEnglish
Pages (from-to)601-604
Number of pages4
JournalJournal of Colloid And Interface Science
Volume283
Issue number2
DOIs
Publication statusPublished - 2005 Mar 15

Keywords

  • Deposition
  • Electroless metal plating
  • Gold
  • Nanoparticles
  • Silica
  • Surface plasmon resonance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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