Journal
BIOSENSORS & BIOELECTRONICS
Volume 74, Issue -, Pages 85-90Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2015.06.022
Keywords
Urea sensor; Molecular imprinting; Transparent TiO2 nanotube; Piezoelectric sensing; Photocatalysis
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Funding
- National Natural Science Foundation of China [51202059]
- Research Foundation for Youth Scholars of Higher Education of Henan Province [2013GGJS-047]
- Fundamental Research Funds for the Universities of Henan Province [NSFRF140201, NSFRF140601]
- Key Foundation of He'nan Educational Committee [14A430014]
- Foundation for Distinguished Young Scientists of Henan Polytechnic University [J2014-05]
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Transparent photocatalytic surfaces are of ever increasing importance for the enhancement of the photocatalytic efficiency. Here, the highly ordered transparent TiO2 nanotube arrays were prepared by the anodization and thermal annealing of titanium layer deposited onto the glass substrate, and a novel nonenzymatic piezoelectric sensor was developed for urea detection based on the modification of molecularly imprinted TiO2 thin film onto transparent TiO2 nanotube arrays. The performance of the fabricated sensor was evaluated and the results indicated that the sensor exhibited high sensitivity in urea detection, with a linear range from 0.04 to 120 mu M and a limit of detection of 0.01 mu M. Moreover, the sensor presented outstanding selectivity while used in coexisting systems containing various interferents with high concentration. The analytical application of the urea sensor confirmed the feasibility of urea detection in urine sample. (C) 2015 Elsevier B.V. All rights reserved.
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