A General Method To Coat Colloidal Particles with Silica
Utrecht University · Institute for Atomic and Molecular Physics
Abstract
A general method to coat colloids with silica is described. The amphiphilic, nonionic polymer poly(vinylpyrrolidone) (PVP) was adsorbed to various colloidal particles such as small gold colloids, gold-shell silica-core particles, small and large silver colloids, boehmite rods, gibbsite platelets, and positively or negatively charged polystyrene. After this functionalization the stabilized particles could be transferred to a solution of ammonia in ethanol and directly coated with smooth and homogeneous silica shells of variable thickness by addition of tetraethoxysilane in a seeded growth process. The length of the polymer used strongly influences the stability of the colloids and the homogeneity and smoothness…
Citation impact
- FWCI
- 21.29
- Percentile
- 100%
- References
- 46
Authors
4- CGChristina GräfCorresponding
Utrecht University, Institute for Atomic and Molecular Physics
- DLDirk L. J. Vossen
Utrecht University, Institute for Atomic and Molecular Physics
- AIArnout Imhof
Institute for Atomic and Molecular Physics, Utrecht University
- AVAlfons van Blaaderen
Institute for Atomic and Molecular Physics, Utrecht University
Topics & keywords
- Colloid
- Chemical engineering
- Polymer
- Materials science
- Polystyrene
- Colloidal silica
- Coating
- Surface modification