期刊
COATINGS
卷 9, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/coatings9040251
关键词
EGFET; TiO2; hydrothermal synthesis
资金
- Ministry of Science and Technology of Taiwan, ROC [MOST 104-2221-E-168-011-MY3, 107-2221-E-006-185-MY3]
- Green Energy Technology Research Center, Department of Electrical Engineering, Kun Shan University, Tainan, Taiwan, from The Featured Areas Research Center Program
In this study, pH sensors were successfully fabricated on a fluorine-doped tin oxide substrate and grown via hydrothermal methods for 8 h for pH sensing characteristics. The morphology was obtained by high-resolution scanning electron microscopy and showed randomly oriented flower-like nanostructures. The TiO2 nanoflower pH sensors were measured over a pH range of 2-12. Results showed a high sensitivity of the TiO2 nano-flowers pH sensor, 2.7 (A)(1/2)/pH, and a linear relationship between I-DS and pH (regression of 0.9991). The relationship between voltage reference and pH displayed a sensitivity of a 46 mV/pH and a linear regression of 0.9989. The experimental result indicated that a flower-like TiO2 nanostructure extended gate field effect transistor (EGFET) pH sensor effectively detected the pH value.
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