title: Aging of gold nanoparticles: ligand exchange with disulfides.
abstract: Aging of thiolate protected gold nanoparticles (AuNPs) results in reduced reactivity in the disulfide exchange as monitored by electron paramagnetic resonance (EPR) spectroscopy with a bisnitroxide disulfide incoming ligand. Factors determining the reactivity of the aged particles were investigated. The presence of different binding sites on the surface of AuNPs and a surface reorganization process during aging can explain observed reactivity trends.
authors: Department of Chemistry, University of York, Heslington,York YO10 5DD, United Kingdom.
authors: Yun
authors: Y
authors: Ma
authors: Victor
authors: V
authors: Chechik
mesh_terms: D004220:Disulfides / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008024:Ligands; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D013997:Time Factors
chemical_list: D004220:Disulfides; D008024:Ligands; D006046:Gold