Lam, Minh Long and Nguyen, Nang Dinh and Tran, Quang Trung (2018) Characterization of NH3 sensing properties of P3HT+rGO+CNT composite films made by spin-coating. Communications in Physics, 28 (4). pp. 369-377. ISSN 0868-3166
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Abstract
Thin films of poly(3-hexylthiophene) (P3HT) incorporated with reduced graphene oxide (rGO) and multi-walled carbon nanotubes (CNTs) were prepared by spin-coating technique. Atomic force microscope (AFM) surface morphology, UV-Vis spectra and NH3 gas sensing of the films were studied. Results showed that the P3HT embedded with a content of 20 wt.% of rGO and 10 % of CNTs (abbreviated to P3GC) resulted in the formation of nanostructured composites, exhibiting 1.50 nm-roughness surface and a semiconducting material with a bandgap of 1.92eV. These structure and composition of the P3GC film are appropriate for making film sensors, whose resistance changes as a function of gas concentration. Monitoring ammonia gas by the sensors showed that the responding time of the sensing reached a value as fast as 30 s, the response at ammonia gas content of 10 ppm attained a value as large as 0.8% and the relative sensitivity was of 0.05 %/ppm.
| Item Type: | Article |
|---|---|
| Subjects: | Engineering Physics |
| Divisions: | Faculty of Engineering Physics and Nanotechnology (FEPN) |
| Depositing User: | Prof. Nang Dinh Nguyen |
| Date Deposited: | 04 Jan 2019 00:18 |
| Last Modified: | 04 Jan 2019 00:21 |
| URI: | http://eprints.uet.vnu.edu.vn/eprints/id/eprint/3396 |
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