期刊
ANALYTICAL CHEMISTRY
卷 89, 期 5, 页码 2880-2885出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.6b04140
关键词
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资金
- National Science Foundation [CHE-1300158]
- Center for Functional Nanomaterials, which is a U.S. DOE Office of Science Facility, at Brookhaven National Laboratory [DE-SC0012704]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1300158] Funding Source: National Science Foundation
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 IrOx NP 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.
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