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Electrodeposited highly porous gold microelectrodes for the direct electrocatalytic oxidation of aqueous glucose


Reference:

Du Toit, H. and Di Lorenzo, M., 2014. Electrodeposited highly porous gold microelectrodes for the direct electrocatalytic oxidation of aqueous glucose. Sensors and Actuators B-Chemical, 192, pp. 725-729.

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    Official URL:

    http://dx.doi.org/10.1016/j.snb.2013.11.017

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    Abstract

    High-surface area electrode materials are particularly relevant for a vast range of applications, especially in the field of catalysis and electrochemical energy conversion (e.g. fuel cells). In this work high surface area gold electrodes were produced by direct electrodeposition of highly porous gold (hPG) films onto gold electrodes via a very fast (15 sec), simple, and cost-effective methodology that involves a hydrogen bubble template. This methodology was also successfully applied to gold microelectrodes produced by lift-off lithography, thus paving the way for interesting lab-on-a–chip applications. The hPG electrodes showed very high sensitivity towards glucose, with a detection limit of 5 μM. This reactivity was maintained when the electrodes were tested in artificial urine, thus encouraging their use in healthcare. The hPG electrodes showed high sensitivity also towards other aldoses and other reducing sugars (maltose, lactose, galactose).

    Details

    Item Type Articles
    CreatorsDu Toit, H.and Di Lorenzo, M.
    DOI10.1016/j.snb.2013.11.017
    Related URLs
    URLURL Type
    http://www.scopus.com/inward/record.url?scp=84890083600&partnerID=8YFLogxKUNSPECIFIED
    DepartmentsFaculty of Engineering & Design > Chemical Engineering
    Research CentresCentre for Sustainable Chemical Technologies
    RefereedYes
    StatusPublished
    ID Code37773

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