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Characteristic optical properties and synthesis of gold–silica core–shell colloids

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Publication Date
Volume
55
Issue
12
Identifiers
DOI: 10.1016/j.scriptamat.2006.08.044
Keywords
  • Optical Properties
  • Gold–Silica Core–Shell Colloid
  • Silica-Coated Gold Nanoparticles
  • Nanowire
Disciplines
  • Physics

Abstract

This paper describes the synthesis of a gold–silica core–shell colloid that could be a building block for optical instruments such as photonic crystals and plasmonic waveguides. It was possible to directly coat gold nanoparticles with uniform shells of amorphous silica via a simplified process that did not use a silane coupling agent. The thickness of the silica shells could be varied from tens to several hundred nanometers by controlling the precipitation time and concentration of tetraethoxysilane.

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