Single-molecule electrochemistry in nanochannels: probing the time of first passage

Shuo Kang, Ab F. Nieuwenhuis, Klaus Mathwig, Dileep Mampallil, Zinaida A. Kostiuchenko, Serge G. Lemay

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Abstract

The diffusive mass transport of individual redox molecules was probed experimentally in microfabricated nanogap electrodes. The residence times for molecules inside a well-defined detection volume were extracted and the resulting distribution was compared with quantitative analytical predictions from random-walk theory for the time of first passage. The results suggest that a small number of strongly adsorbing sites strongly influence mass transport at trace analyte levels.
Original languageEnglish
Pages (from-to)41-50
JournalFaraday discussions
Volume193
DOIs
Publication statusPublished - 21 Apr 2016
EventFaraday Discussion on Single Entity Electrochemistry 2016 - York, United Kingdom
Duration: 31 Aug 20162 Sep 2016

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