title: Stabilization and size control of gold nanoparticles during laser ablation in aqueous cyclodextrins.
abstract: Femtosecond laser radiation has been used to ablate a gold target in aqueous beta-cyclodextrin (CD) solutions to produce stable gold nanoparticle colloids with extremely small size (2 to 2.4 nm) and size dispersion (1 to 1.5 nm). On the basis of XPS and zeta-potential measurements, we propose a model involving chemical interactions between the gold and the CDs. The model includes both the hydrophobic interaction of the Au0 with the interior cavity of the CD and the hydrogen bonding of O- groups on the partially oxidized gold surface with -OH groups of the CDs.
authors.affiliation: Laser Processing Laboratory, Department of Engineering Physics, Ecole Polytechnique de Montréal, Case Postale 6079, succ. Centre-Ville, Montréal, Québec, Canada, H3C 3A7.
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Sylvestre
authors.forename: Andrei V
authors.initials: AV
authors.lastname: Kabashin
authors.forename: Edward
authors.initials: E
authors.lastname: Sacher
authors.forename: Michel
authors.initials: M
authors.lastname: Meunier
authors.forename: John H T
authors.initials: JH
authors.lastname: Luong
mesh_terms: D003505:Cyclodextrins / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007834:Lasers; D036103:Nanotechnology
chemical_list: D003505:Cyclodextrins; D006046:Gold