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Sensors 2013, 13(10), 14161-14174; doi:10.3390/s131014161

Development of Anodic Titania Nanotubes for Application in High Sensitivity Amperometric Glucose and Uric Acid Biosensors

2,* , 2
Received: 24 August 2013 / Revised: 29 September 2013 / Accepted: 9 October 2013 / Published: 21 October 2013
(This article belongs to the Special Issue Nanotube and Nanowire Sensors)
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The purpose of this study was to develop novel nanoscale biosensors using titania nanotubes (TNTs) made by anodization. Titania nanotubes were produced on pure titanium sheets by anodization at room temperature. In this research, the electrolyte composition ethylene glycol 250 mL/NH4F 1.5 g/DI water 20 mL was found to produce the best titania nanotubes array films for application in amperometric biosensors. The amperometric results exhibit an excellent linearity for uric acid (UA) concentrations in the range between 2 and 14 mg/dL, with 23.3 (µA·cm−2)·(mg/dL)−1 UA sensitivity, and a correlation coefficient of 0.993. The glucose biosensor presented a good linear relationship in the lower glucose concentration range between 50 and 125 mg/dL, and the corresponding sensitivity was approximately 249.6 (µA·cm−2)·(100 mg/dL)−1 glucose, with a correlation coefficient of 0.973.
Keywords: titania nanotubes (TNTs); amperometry; glucose; uric acid (UA) titania nanotubes (TNTs); amperometry; glucose; uric acid (UA)
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.

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Lee, H.-C.; Zhang, L.-F.; Lin, J.-L.; Chin, Y.-L.; Sun, T.-P. Development of Anodic Titania Nanotubes for Application in High Sensitivity Amperometric Glucose and Uric Acid Biosensors. Sensors 2013, 13, 14161-14174.

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