title: Facile photochemical synthesis of unprotected aqueous gold nanoparticles.
abstract: Aqueous, unprotected gold nanoparticles were prepared from HAuCl4 using a water-soluble benzoin (Irgacure-2959) as a photochemical source of strongly reducing ketyl radicals. This rapid method provides spatiotemporal control of nanoparticle generation, while light intensity can be used to control particle size. The particles are stable for months and do not require any of the conventional (S, N, or P) stabilizing ligands, although these can be readily incorporated if required.
authors.affiliation: Department of Chemistry, University of Ottawa, Ottawa K1N 6N5, Canada.
authors.forename: Katherine L
authors.initials: KL
authors.lastname: McGilvray
authors.forename: Matthew R
authors.initials: MR
authors.lastname: Decan
authors.forename: Dashan
authors.initials: D
authors.lastname: Wang
authors.forename: Juan C
authors.initials: JC
authors.lastname: Scaiano
mesh_terms: D006046:Gold / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D010777:Photochemistry; D013057:Spectrum Analysis
chemical_list: D006046:Gold