title: Collisions of Ir Oxide Nanoparticles with Carbon Nanopipettes: Experiments with One Nanoparticle.
abstract: Investigating the collisions of individual metal nanoparticles (NPs) with electrodes can provide new insights into their electrocatalytic behavior, mass transport, and interactions with surfaces. Here we report a new experimental setup for studying NP collisions based on the use of carbon nanopipettes to enable monitoring multiple collision events involving the same NP captured inside the pipet cavity. A patch clamp amplifier capable of measuring pA-range currents on the microsecond time scale with a very low noise and stable background was used to record the collision transients. The analysis of current transients produced by oxidation of hydrogen peroxide at one IrOxNP provided information about the origins of deactivation of catalytic NPs and the effects of various experimental conditions on the collision dynamics. High-resolution TEM of carbon pipettes was used to attain better understanding of the NP capture and collisions.
authors.affiliation: Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States.
authors.forename: Min
authors.initials: M
authors.lastname: Zhou
authors.affiliation: Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States.|The Graduate Center, CUNY , New York, New York 10016, United States.
authors.forename: Yun
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States.|The Graduate Center, CUNY , New York, New York 10016, United States.
authors.forename: Keke
authors.initials: K
authors.lastname: Hu
authors.affiliation: Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States.
authors.forename: Huolin L
authors.initials: HL
authors.lastname: Xin
authors.affiliation: Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States.|The Graduate Center, CUNY , New York, New York 10016, United States.
authors.forename: Michael V
authors.identifier: 0000-0002-3424-5810
authors.initials: MV
authors.lastname: Mirkin