title: Observation of Multipeak Collision Behavior during the Electro-Oxidation of Single Ag Nanoparticles.
abstract: The dynamic collision behavior of the electro-oxidation of single Ag nanoparticles is observed at Au microelectrodes using stochastic single-nanoparticle collision amperometry. Results show that an Ag nanoparticle collision/oxidation event typically consists of a series of 1 to ∼10 discrete "sub-events" over an ∼20 ms interval. Results also show that the Ag nanoparticles typically undergo only partial oxidation prior to diffusing away from the Au electrode into the bulk solution. Both behaviors are characterized and shown to exist under a variety of experimental conditions. These previously unreported behaviors suggest that nanoparticle collision and electro-dissolution is a highly dynamic process driven by fast particle-electrode interactions and nanoparticle diffusion.
authors.affiliation: Department of Chemistry, University of Washington , Seattle, Washington 98195, United States.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Oja
authors.affiliation: Department of Chemistry, University of Utah , Salt Lake City, Utah 84112, United States.
authors.forename: Donald A
authors.initials: DA
authors.lastname: Robinson
authors.affiliation: Department of Chemistry, University of Utah , Salt Lake City, Utah 84112, United States.
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Vitti
authors.affiliation: Department of Chemistry, University of Utah , Salt Lake City, Utah 84112, United States.
authors.forename: Martin A
authors.identifier: 0000-0001-8072-361X
authors.initials: MA
authors.lastname: Edwards
authors.affiliation: Department of Chemistry, University of Utah , Salt Lake City, Utah 84112, United States.
authors.forename: Yuwen
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Chemistry, University of Utah , Salt Lake City, Utah 84112, United States.
authors.forename: Henry S
authors.identifier: 0000-0002-5053-0996
authors.initials: HS
authors.lastname: White
authors.affiliation: Department of Chemistry, University of Washington , Seattle, Washington 98195, United States.
authors.forename: Bo
authors.identifier: 0000-0002-1737-1241
authors.initials: B
authors.lastname: Zhang