title: Enhanced third-order optical nonlinearity of silver nanoparticles with a tunable surface plasmon resonance.
abstract: Poly(vinylalcohol) (PVA)-stabilized silver nanoparticles were prepared by a seeding method. Nanoparticles of varying morphology were obtained by controlled variation of the reaction conditions, and this method allowed the tailoring of the position of the surface plasmon resonance. The samples show two bands in the visible absorption spectrum: one in the 410-440-nm region and a second peak between 500 and 600 nm. This tunable surface plasmon resonance serves to increase the third-order optical nonlinearity (chi 3) of the nanoparticles (measured at 532 nm) by a factor of 16.
authors.affiliation: Department of Chemistry, Trinity College, Dublin 2, Ireland.
authors.forename: Aine M
authors.initials: AM
authors.lastname: Whelan
authors.forename: Margaret E
authors.initials: ME
authors.lastname: Brennan
authors.forename: Werner J
authors.initials: WJ
authors.lastname: Blau
authors.forename: John M
authors.initials: JM
authors.lastname: Kelly
mesh_terms: D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D017711:Nonlinear Dynamics; D010316:Particle Size; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D012834:Silver; D011142:Polyvinyl Alcohol