Composition-selective fabrication of ordered intermetallic Au-Cu nanowires and their application to nano-size electrochemical glucose detection

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Bimetallic nanostructures can provide distinct and improved physicochemical properties by the coupling effect of the two metal components, making them promising materials for a variety of applications. Herein, we report composition-selective fabrication of ordered intermetallic Au-Cu nanowires (NWs) by two-step chemical vapor transport method and their application to nano-electrocatalytic glucose detection. Ordered intermetallic Au3Cu and AuCu3 NWs are topotaxially fabricated by supplying Cu-containing chemicals to pre-synthesized single-crystalline Au NW arrays. The composition of fabricated Au-Cu NWs can be selected by changing the concentration of Cu-containing species. Interestingly, Au3Cu NW electrodes show unique electrocatalytic activity for glucose oxidation, allowing us to detect glucose without interference from ascorbic acid. Such interference-free detection of glucose is attributed to the synergistic effect, induced by incorporation of Cu in Au. We anticipate that Au3Cu NWs could show possibility as efficient nano-size electrochemical glucose sensors and the present fabrication method can be employed to fabricate valuable ordered intermetallic nanostructures.
Publisher
IOP PUBLISHING LTD
Issue Date
2015-06
Language
English
Article Type
Article
Keywords

OXYGEN REDUCTION REACTION; CORE-SHELL; ELECTROCATALYTIC PERFORMANCE; ALLOY NANOPARTICLES; FORMIC-ACID; NANOCRYSTALS; OXIDATION; PD; METHANOL; ARRAYS

Citation

NANOTECHNOLOGY, v.26, no.24

ISSN
0957-4484
DOI
10.1088/0957-4484/26/24/245702
URI
http://hdl.handle.net/10203/199453
Appears in Collection
CH-Journal Papers(저널논문)
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