Synthesis of Core@Shell Composites with Gold Nanoparticles Trapped inside Ceramic Silica Shells by the Sol-Gel Method

Chien Jung Huang; Pin Hsiang Chiu; Yeong Her Wang

doi:10.4028/www.scientific.net/KEM.368-372.797

Paper Titles

Influence of Preparation Temperature on Performance of Ce_1-xPr_xO₂ Ultrafine Powder Prepared by a Microemulsion Process
p.784

Preparation and Characterization of SiO₂ Nanoparticles by Microemulsion Method
p.787

Fabrication of the Monolithic Silica Aerogels Using Sodium Silicate and its Network Strengthening
p.790

Preparation of Silicon Dioxide Fiber via Sol-Gel Process
p.794

Synthesis of Core@Shell Composites with Gold Nanoparticles Trapped inside Ceramic Silica Shells by the Sol-Gel Method
p.797

Effect of Heat Treatment on the Microstructure of TiO₂ Nanofibers Prepared by Refluxing in Basic Solution
p.800

Synthesis of Mullite Nanocomposite from Natural Kaolin
p.803

Hydrothermal Synthesis of Nanosized Mullite Powders
p.806

Preparation and Structure Characterization of Mullite Fiber Porous Ceramic
p.809

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Synthesis of Core@Shell Composites with Gold Nanoparticles Trapped inside Ceramic Silica Shells by the Sol-Gel Method

Abstract:

This paper describes a sol-gel (SG) method for the coating of gold nanoparticles with uniform shells of amorphous silica. The thickness of silica could be conveniently controlled in the range of 10 to 120 nm by increasing the amount of water. Although spherical gold nanoparticles generally have a surface plasmon resonance (SPR) at a wavelength of about 520 nm, a spherical gold core with a silica shell offers a very highly tunable SPR wavelength depending on the thickness of the silica shell.