Unary- or binary-plasmonic nanoparticle-assemblies formed within hollow silica particles with a surfactant-assisted method

Haruyuki Ishii, Yohei Ishikawa, Daisuke Nagao, Mikio Konno

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In this study, a surfactant-assisted method was employed to successfully prepare plasmonic nanoparticle assemblies encapsulated in hollow silica particles. In this method, silica was precipitated in the presence of plasmonic nanoparticles with single nanometer sizes and an anionic surfactant, sodium oleate (NaOA). The absorption peak of the composite particles was red-shifted compared with that for the well-dispersed suspension of the plasmonic nanoparticles. The extent of red-shift was easily tuned by changing the concentration of nanoparticles incorporated in the hollow silica particles. A binary-nanoparticle assembly, comprising gold and silver nanoparticles, was also prepared. Hence, this method can be extended to the design of novel multifunctional particles based on different nanoparticle assemblies.

Original languageEnglish
Pages (from-to)256-259
Number of pages4
JournalMaterials Letters
Volume221
DOIs
Publication statusPublished - 2018 Jun 15

Keywords

  • Binary nanoparticle assembly
  • Colloidal nanoparticle assembly
  • Hollow silica particle
  • Plasmonic nanoparticle
  • Surfactant-assisted method

ASJC Scopus subject areas

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

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