Preparation of multilayered gold-silica-polystyrene core-shell particles by seeded polymerization

Shunchao Gu, Junya Onishi, Eiichi Mine, Yoshio Kobayashi, Mikio Konno

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

A preparation method for multilayered gold-silica-polystyrene core-shell composite particles is proposed. The gold-silica core-shell particles of 192-nm-sized, synthesized by coating the 18-nm-sized gold particles with silica by a seeded growth technique, were used as cores for succeeding polystyrene coating. After surface modification of gold-silica composite particles by methacryloxypropyltrimethoxysilane (MPTMS), polymerizations of styrene (0.16-0.4 M) were conducted with 8×10 -3 M of potassium persulfate initiator in the presence of 1×10 -3 M of sodium p-styrenesulfonate anionic monomer. Multilayered core-shell gold-silica- polystyrene particles that contained a single core could be obtained. The coefficient of variation of size distribution (C V) of the composite particles was less than 7%, and polystyrene shell thickness was in a range of 193 to 281 nm.

Original languageEnglish
Pages (from-to)284-287
Number of pages4
JournalJournal of Colloid And Interface Science
Volume279
Issue number1
DOIs
Publication statusPublished - 2004 Nov 1

Keywords

  • Anionic monomer
  • Core-shell
  • Coupling reagent
  • Gold particle
  • Multilayered particle
  • Nanoparticles
  • Polystyrene coating
  • Seeded polymerization
  • Silica coating
  • Sol-gel

ASJC Scopus subject areas

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

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