A high-performance nonenzymatic piezoelectric sensor based on molecularly imprinted transparent TiO2 film for detection of urea

Modification of nanocrystalline TiO2 coatings with molecularly imprinted TiO2 for uric acid recognition

“…The crystal structure and composition of electrode were identified by XRD and FTIR. As seen in Figure A, the relatively narrow diffraction peaks at 2θ = 25.4 o , 37.9 o , 48 o , 54.6, o and 62.7 o could be perfectly assigned to the typical crystal planes of anatase, and the infrared spectrum also revealed the characteristic peaks of TiO 2 at 3410, 1657, and 900 to 400 cm −1 (Figure B) . Both XRD and FTIR analyses indicated the presence of anatase TiO 2 on the QCM electrode.…”

“…Recently, inorganic matrices have been employed for molecular imprinting. Compared with MIP, molecularly imprinted inorganic matrices not only possessed a better stability and structural rigidity but also relieved some drawbacks of organic material such as low binding efficiency, slow binding process, and difficult fabrication . Silica, hydroxyapatite, and TiO 2 sol‐gel materials have been used to prepare molecularly imprinted thin films at the surface of QCM electrode, which were used for the detection of organisms .…”

“…Compared with MIP, molecularly imprinted inorganic matrices not only possessed a better stability and structural rigidity but also relieved some drawbacks of organic material such as low binding efficiency, slow binding process, and difficult fabrication. 26 Silica, hydroxyapatite, and TiO 2 sol-gel materials have been used to prepare molecularly imprinted thin films at the surface of QCM electrode, which were used for the detection of organisms. [27][28][29] Despite molecularly imprinted inorganic films exhibited favorable selectivity in piezoelectric sensing, the electrodes usually possessed a small surface to volume ratio, significantly affecting their sensing performance.…”

Shedding light on precursor and thermal treatment effects on the nanostructure of electrospun TiO2 fibers

“…applications including solar cells [1,2], photocatalysts for air and water purification [3][4][5], gas sensors [6][7][8] and biocompatible coatings for biomaterials [9,10]. The most common crystalline forms of TiO 2 are anatase and rutile, both showing a tetragonal crystalline structure.…”

Biosensor of Urine Analysis Based on Graphene Nano Sheet

“…Since many decades, some analytical methods have been developed for urea detection, such as enzymatic assay, gas chromatography, calorimetry, high-performance liquid chromatography), fluorimetry, surface plasmon resonance and electrochemistry, Despite many advances in urea detection, many of these methods still do not meet the growing demand for more sensitive and selective detection of urea. Thus, the further development of simple, facile and stable methods with high sensitivity and selectivity for urea detection is highly needed [1].…”