title: Polystyrene-Core-Silica-Shell Hybrid Particles Containing Gold and Magnetic Nanoparticles.
abstract: Polystyrene-core-silica-shell hybrid particles were synthesized by combining the self-assembly of nanoparticles and the polymer with a silica coating strategy. The core-shell hybrid particles are composed of gold-nanoparticle-decorated polystyrene (PS-AuNP) colloids as the core and silica particles as the shell. PS-AuNP colloids were generated by the self-assembly of the PS-grafted AuNPs. The silica coating improved the thermal stability and dispersibility of the AuNPs. By removing the "free" PS of the core, hollow particles with a hydrophobic cage having a AuNP corona and an inert silica shell were obtained. Also, Fe3O4 nanoparticles were encapsulated in the core, which resulted in magnetic core-shell hybrid particles by the same strategy. These particles have potential applications in biomolecular separation and high-temperature catalysis and as nanoreactors.
authors.affiliation: Institute of Physical Chemistry, Georg-August-University Göttingen, Tammannstrasse 6, 37077, Göttingen, Germany. jia.tian@chemie.uni-goettingen.de.
authors.forename: Jia
authors.initials: J
authors.lastname: Tian
authors.affiliation: Institute of Physical Chemistry, Georg-August-University Göttingen, Tammannstrasse 6, 37077, Göttingen, Germany.
authors.forename: Philipp
authors.initials: P
authors.lastname: Vana
keywords: core-shell hybrid materials; gold; magnetic properties; nanoparticles; silica coating