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ZnO nanowires modified with Au nanoparticles for nonenzymatic amperometric sensing of glucose

Authors :
Ting-Jen Hsueh
Siou Yi Lin
Shoou-Jinn Chang
Source :
Applied Physics Letters. 104:193704
Publication Year :
2014
Publisher :
AIP Publishing, 2014.

Abstract

ZnO nanowires (NWs) synthesized using the vapor-phase deposition method on an Au electrode substrate with and without Au nanoparticle (NP) modification are applied for glucose detection. A significant enhancement of glucose sensitivity is obtained with Au NP modification. The Au NPs/ZnO NWs/Au electrode has peak currents gradually increasing from 41.2 to 155.5 μA, and the ZnO NWs/Au electrode has peak currents increasing from 23.6 to 82.2 μA with glucose concentration (5, 10, 15, 20, and 25 mM) in cyclic voltammograms. Moreover, chronoamperometry results indicate that the response current of the Au NPs/ZnO NWs/Au electrode reached 140 μA in 18 mM glucose in 0.1M NaOH, whereas that of the ZnO NWs/Au electrode was only around 74 μA in 31.5 mM glucose.

Details

ISSN :
10773118 and 00036951
Volume :
104
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........1384fa57018ae723921b482bfcebc0a0