Enzymatic Urea Sensor Based on Graphene Oxide/Titanium Dioxide Films Modified by Urease-Magnetic Beads
| Autor: | Siao-Jie Yan, You-Xiang Wu, Chih-Hsien Lai, Cian-Yi Wu, Jung-Chuan Chou, Si-Hong Lin, Yi-Hung Liao |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Urease biology Scanning electron microscope Graphene Oxide 02 engineering and technology Substrate (electronics) 021001 nanoscience & nanotechnology Computer Science Applications Dielectric spectroscopy law.invention chemistry.chemical_compound Chemical engineering chemistry law Titanium dioxide biology.protein Urea Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | IEEE Transactions on Nanotechnology. 18:336-344 |
| ISSN: | 1941-0085 1536-125X |
| DOI: | 10.1109/tnano.2019.2907225 |
| Popis: | In this paper, we proposed an enzymatic urea sensor using urease-magnetic beads (MBs) modified graphene oxide (GO)/titanium dioxide (TiO 2 ) composite layers. The urea sensor was prepared by screen-printing technology and radio frequency sputtering. TiO 2 sensing film was deposited onto polyethylene terephthalate substrate, which serves as an efficient matrix for immobilization of urease. Preparation of GO/TiO 2 films was completed after GO being deposited onto the TiO 2 film. Moreover, the characterization and sensing properties of the urea sensor were performed by energy dispersive spectrometer, scanning electron microscope, atomic force microscopy, electrochemical impedance spectroscopy, and voltage-time measurement system. The results indicated that the GO/TiO 2 urea sensor enhances its performance of average sensitivity, response time, and drift rate after modifying the sensing membrane though MBs. |
| Databáze: | OpenAIRE |
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