title: Poly(p-hydroxystyrene) grafted polystyrene nanospheres: excellent hosts for silver and ruthenium nanoparticles.
abstract: A novel approach is described for the preparation of surface functionalized micro- and nanobeads using one pot synthesis by a core-shell method. Monodisperse poly(p-hydroxystyrene) is successfully prepared by grafting the p-acetoxystyrene monomer during the last 30 min of the fabrication of polystyrene bead core by emulsifier-free emulsion polymerization followed by hydrolysis of the acetoxy group by a base. The size of the resulting beads is dictated mostly by the size of the core. Hydroxyl derivatized polystyrene microspheres have been found useful as a high surface area and stable support for anchoring catalytically active silver and ruthenium nanoparticles. The bead formation, surface functionalization, and coating with metal nanoparticles have been studied using scanning electron microscopy, transmission electron microscopy, energy dispersive x-ray spectrometry, Fourier transform infrared spectrometry, and Auger analysis.
authors.affiliation: Loker Hydrocarbon Research Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, USA.
authors.forename: M T
authors.initials: MT
authors.lastname: Greci
authors.forename: S
authors.initials: S
authors.lastname: Pathak
authors.forename: K
authors.initials: K
authors.lastname: Mercado
authors.forename: G K
authors.initials: GK
authors.lastname: Prakash
authors.forename: M E
authors.initials: ME
authors.lastname: Thompson
authors.forename: G A
authors.initials: GA
authors.lastname: Olah
mesh_terms: D002384:Catalysis; D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis*; D003102:Colloids / Q000138:chemical synthesis; D046911:Macromolecular Substances; D008422:Materials Testing; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry; D011137:Polystyrenes / Q000138:chemical synthesis / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D020099:Coated Materials, Biocompatible; D003102:Colloids; D046911:Macromolecular Substances; D011108:Polymers; D011137:Polystyrenes; D012834:Silver; C047732:hydroxystyrene-styrene; D012428:Ruthenium