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 language | English |
|---|---|
| Pages (from-to) | 284-287 |
| Number of pages | 4 |
| Journal | Journal of Colloid And Interface Science |
| Volume | 279 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2004 Nov 1 |
| Externally published | Yes |
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