Characterization of NH\(_3\) Sensing Properties of P3HT+rGO+CNT Composite Films Made by Spin-coating

Authors

  • Lam Minh Long University of Engineering and Technology Vietnam National University Hanoi (VNU-UET)
  • Nguyen Nang Dinh University of Engineering and Technology Vietnam National University Hanoi (VNU-UET)
  • Tran Quang Trung University of Natural Science, VNU in Ho Chi Minh City

DOI:

https://doi.org/10.15625/0868-3166/28/4/12683

Keywords:

P3HT rGO CNT composite, surface morphology, UV-Vis spectra, NH3 gas sensors, sensing response.

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.

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Author Biographies

Lam Minh Long, University of Engineering and Technology Vietnam National University Hanoi (VNU-UET)

Faculty of Engineering Physics & Nanotechnology

Nguyen Nang Dinh, University of Engineering and Technology Vietnam National University Hanoi (VNU-UET)

Faculty of Engineering Physics & Nanotechnology

Tran Quang Trung, University of Natural Science, VNU in Ho Chi Minh City

Department of Solid State Physics

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Published

27-12-2018

How to Cite

Long, L. M., Dinh, N. N., & Trung, T. Q. (2018). Characterization of NH\(_3\) Sensing Properties of P3HT+rGO+CNT Composite Films Made by Spin-coating. Communications in Physics, 28(4), 369. https://doi.org/10.15625/0868-3166/28/4/12683

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