title: A high-performance nonenzymatic piezoelectric sensor based on molecularly imprinted transparent TiO2 film for detection of urea.
abstract: 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 μM and a limit of detection of 0.01 μM. 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.
authors.affiliation: Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
authors.forename: Zheng-peng
authors.initials: ZP
authors.lastname: Yang
authors.affiliation: Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
authors.forename: Xuan
authors.initials: X
authors.lastname: Liu
authors.affiliation: Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China. Electronic address: chunjingzhang2013@163.com.
authors.forename: Chun-jing
authors.initials: CJ
authors.lastname: Zhang
authors.affiliation: Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China. Electronic address: baozhongliu2013@163.com.
authors.forename: Bao-zhong
authors.initials: BZ
authors.lastname: Liu
mesh_terms: D055664:Electrochemical Techniques / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D057230:Limit of Detection; D054802:Molecular Imprinting; D014025:Titanium / Q000737:chemistry*; D014508:Urea / Q000652:urine*
chemical_list: C009495:titanium dioxide; D014508:Urea; D014025:Titanium
keywords: Molecular imprinting; Photocatalysis; Piezoelectric sensing; Transparent TiO(2) nanotube; Urea sensor