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Sensors 2012, 12(10), 13019-13033; doi:10.3390/s121013019

Cu2O and Au/Cu2O Particles: Surface Properties and Applications in Glucose Sensing

1 and 1,2,*
1 School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA 2 Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA
* Author to whom correspondence should be addressed.
Received: 26 July 2012 / Revised: 31 August 2012 / Accepted: 3 September 2012 / Published: 26 September 2012
(This article belongs to the Section Chemical Sensors)
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In this work we investigated the surface and facet-dependent catalytic properties of metal oxide particles as well as noble metal/metal oxide heterogeneous structures, with cuprous oxide (Cu2O) and Au/Cu2O being selected as model systems. As an example of application, we explored the potential of these materials in developing electrocatalytic devices. Cu2O particles were synthesized in various shapes, then used for testing their morphology-dependent electrochemical properties applied to the detection of glucose. While we did not attempt to obtain the best detection limit reported to date, the octahedral and hexapod Cu2O particles showed reasonable detection limits of 0.51 and 0.60 mM, respectively, which are physiologically relevant concentrations. However, detection limit seems to be less affected by particle shapes than sensitivity. Heterogeneous systems where Au NPs were deposited on the surface of Cu2O particles were also tested with similar results in terms of the effect of surface orientation.
Keywords: oxide; sensor; surface chemistry oxide; sensor; surface chemistry
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Won, Y.-H.; Stanciu, L.A. Cu2O and Au/Cu2O Particles: Surface Properties and Applications in Glucose Sensing. Sensors 2012, 12, 13019-13033.

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