Electrochemical nanofluidics: the mesoscopic limit

MAG Zevenbergen, N Wongrajit, PS Singh, B Wolfrum, ED Goluch, SG Lemay

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

ABSTRACT We have developed a lithography-based nanofluidic device for sensitive electrochemical detection applications. The device consists of a solution-filled channel bounded by parallel electrodes that are separated by ~50 nm. Redox cycling at the two electrodes is used to amplify the electrochemical signals from molecules in the volume between the electrodes, and can lead to dramatic improvements in sensitivity and/or selectivity. Interestingly, an important limit to sensitivity is placed by statistical fluctuations in the number of molecules present in the device, a consequence of its extremely small volume (a few femtolitres). In this Proceedings article, we focus on the consequences of these statistical fluctuations on the signal-to-noise ratio of electrochemical sensors based on redox cycling. KEYWORDS: Nanofluidics, electrochemistry, sensing, number fluctuations, mesoscopic.
Original languageEnglish
Title of host publicationUnknown
Place of PublicationGroningen
Pages1406-1408
Number of pages3
Publication statusPublished - 2010

Keywords

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    Zevenbergen, MAG., Wongrajit, N., Singh, PS., Wolfrum, B., Goluch, ED., & Lemay, SG. (2010). Electrochemical nanofluidics: the mesoscopic limit. In Unknown (pp. 1406-1408).