Hydrodynamic Voltammetry with Nanogap Electrodes

Liza Rassaei; Klaus Mathwig; E.D. Goluch; Serge Joseph Guy Lemay

doi:10.1021/jp2118696

Hydrodynamic Voltammetry with Nanogap Electrodes

Liza Rassaei, Klaus Mathwig, E.D. Goluch, Serge Joseph Guy Lemay

Faculty of Science and Technology

Research output: Contribution to journal › Article › Academic › peer-review

28 Citations (Scopus)

58 Downloads (Pure)

Abstract

We study the influence of convective mass transport on faradaic currents detected under redox cycling conditions at nanogap electrodes embedded in a microchannel. We show that, unlike the case of microelectrodes, the limiting current in the nanofluidic device is not influenced by the sample flow rate in the microfluidic channel. This is due to both the hydraulic resistance of the nanochannel suppressing flow within the device and the inherently diffusion-based mass transport between microelectrodes separated by a 70 nm gap. These devices thus allow electrochemical measurements without the need for any flow velocity correction.

Original language	English
Pages (from-to)	10913-10916
Journal	The Journal of physical chemistry C
Volume	116
Issue number	20
DOIs	https://doi.org/10.1021/jp2118696
Publication status	Published - 2012

Keywords

IR-84824
METIS-291164

Access to Document

10.1021/jp2118696

Rassaei12hydroFinal published version, 1.22 MBLicence: Taverne

28 Citations
1 Comment/Letter to the editor

Erratum: Hydrodynamic Voltammetry with Nanogap Electrodes (J. Phys. Chem. C (2012) 116:20 (10913-10916) DOI: 10.1021/jp2118696)
Rassaei, L., Mathwig, K., Goluch, E. D. & Lemay, S. G., 18 Feb 2016, In: The Journal of physical chemistry C. 120, 5, p. 3086 1 p.
Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review

Open Access
File

15 Downloads (Pure)

Cite this

@article{b45f28d1f1a946b8a1fddf08f2e579bb,

title = "Hydrodynamic Voltammetry with Nanogap Electrodes",

abstract = "We study the influence of convective mass transport on faradaic currents detected under redox cycling conditions at nanogap electrodes embedded in a microchannel. We show that, unlike the case of microelectrodes, the limiting current in the nanofluidic device is not influenced by the sample flow rate in the microfluidic channel. This is due to both the hydraulic resistance of the nanochannel suppressing flow within the device and the inherently diffusion-based mass transport between microelectrodes separated by a 70 nm gap. These devices thus allow electrochemical measurements without the need for any flow velocity correction.",

keywords = "IR-84824, METIS-291164",

author = "Liza Rassaei and Klaus Mathwig and E.D. Goluch and Lemay, {Serge Joseph Guy}",

year = "2012",

doi = "10.1021/jp2118696",

language = "English",

volume = "116",

pages = "10913--10916",

journal = "The Journal of physical chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "20",

}

TY - JOUR

T1 - Hydrodynamic Voltammetry with Nanogap Electrodes

AU - Rassaei, Liza

AU - Mathwig, Klaus

AU - Goluch, E.D.

AU - Lemay, Serge Joseph Guy

PY - 2012

Y1 - 2012

N2 - We study the influence of convective mass transport on faradaic currents detected under redox cycling conditions at nanogap electrodes embedded in a microchannel. We show that, unlike the case of microelectrodes, the limiting current in the nanofluidic device is not influenced by the sample flow rate in the microfluidic channel. This is due to both the hydraulic resistance of the nanochannel suppressing flow within the device and the inherently diffusion-based mass transport between microelectrodes separated by a 70 nm gap. These devices thus allow electrochemical measurements without the need for any flow velocity correction.

AB - We study the influence of convective mass transport on faradaic currents detected under redox cycling conditions at nanogap electrodes embedded in a microchannel. We show that, unlike the case of microelectrodes, the limiting current in the nanofluidic device is not influenced by the sample flow rate in the microfluidic channel. This is due to both the hydraulic resistance of the nanochannel suppressing flow within the device and the inherently diffusion-based mass transport between microelectrodes separated by a 70 nm gap. These devices thus allow electrochemical measurements without the need for any flow velocity correction.

KW - IR-84824

KW - METIS-291164

U2 - 10.1021/jp2118696

DO - 10.1021/jp2118696

M3 - Article

SN - 1932-7447

VL - 116

SP - 10913

EP - 10916

JO - The Journal of physical chemistry C

JF - The Journal of physical chemistry C

IS - 20

ER -

Hydrodynamic Voltammetry with Nanogap Electrodes

Abstract

Keywords

Access to Document

Fingerprint

Research output

Erratum: Hydrodynamic Voltammetry with Nanogap Electrodes (J. Phys. Chem. C (2012) 116:20 (10913-10916) DOI: 10.1021/jp2118696)

Cite this