title: Photochemical strategies for the seed-mediated growth of gold and gold-silver nanoparticles.
abstract: Gold nanoparticles (AuNP) can be used as seeds for the synthesis of larger AuNP of controllable size with narrow size distribution by photochemical reduction of additional Au(III) using water-soluble benzoins or H(2)O(2) as sources of reducing radicals. Further, beyond simply enlarging the AuNP, it is possible to add a shell of another metal, such as silver, leading to Au/Ag core-shell structures with controllable dimensions for both core and shell. This strategy illustrates the fine spatial and temporal control achievable using clean photochemical techniques without the addition of hard surface ligands often necessary to control the size and structure of gold-silver nanostructures. The mild nature of the surface coverage makes these nanomaterials ideal for further surface modification.
authors.affiliation: Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario, Canada.
authors.forename: Katherine L
authors.initials: KL
authors.lastname: McGilvray
authors.forename: Chiara
authors.initials: C
authors.lastname: Fasciani
authors.forename: Carlos J
authors.initials: CJ
authors.lastname: Bueno-Alejo
authors.forename: Rachel
authors.initials: R
authors.lastname: Schwartz-Narbonne
authors.forename: Juan C
authors.initials: JC
authors.lastname: Scaiano
mesh_terms: D006046:Gold / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D010777:Photochemistry / Q000379:methods; D012834:Silver / Q000737:chemistry*
chemical_list: D012834:Silver; D006046:Gold; D006861:Hydrogen Peroxide