Journal
CHEMELECTROCHEM
Volume 5, Issue 20, Pages 3059-3067Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201800696
Keywords
random walk; stochastic processes; temporal resolution; bandwidth; Ag nanoparticle
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Funding
- Air Force Office of Scientific Research [MURI FA9550-14-1-0003]
- Office of Naval Research [N00014-16-1-2541]
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We discuss herein present-day instrumental limitations to the electrochemical measurement of fast processes occurring at the single-entity scale. We focus on the effect of filters on potentiostatic experiments in which the monitored current results from partial oxidations of an individual Ag nanoparticle undergoing repeated high-frequency collisions with an electrode. From analysis of the resulting peak-shaped current-time events, we conclude that the average timescale of a single Ag nanoparticle/electrode collision is too short to resolve at the temporal limitations of current instrumentation. These findings are consistent with previously reported random walk model that predicts nanoparticle/electrode interactions at nanosecond timescales.
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