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Journal of Nanomaterials
Volume 2008, Article ID 638523, 5 pages
http://dx.doi.org/10.1155/2008/638523
Research Article

Fabrication and Characterization of ZnO Nanowire Arrays with an Investigation into Electrochemical Sensing Capabilities

1Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA
2Nanomaterials and Nanomanufacturing Research Center, University of South Florida, Tampa, FL 33620, USA
3Department of Electrical Engineering, University of South Florida, Tampa, FL 33620, USA

Received 25 August 2008; Accepted 25 November 2008

Academic Editor: Rakesh Joshi

Copyright © 2008 Jessica Weber et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

ZnO nanowire arrays were grown on a Si (100) substrate using the vapor-liquid-solid (VLS) method. ZnO nanowires were characterized by XRD, SEM, bright field TEM, and EDS. They were found to have a preferential orientation along the -axis. The as-prepared sample was functionalized with glucose oxidase by physical adsorption. FTIR was taken before and after functionalization to verify the presence of the attached enzyme. Electrochemical measurements were performed on the nanowire array by differential pulse voltammetry in the range of to 0.4 V. The nanoarray sensor displayed high sensitivity to glucose in the range of 1.0 to 1.0  mol .