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

Lam Minh Long, Nguyen Nang Dinh, Tran Quang Trung


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.


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

Full Text:



T. Hibbard, K. Crowley, and A. J. Killard, Analytica Chimica Acta, 779 (2013) 6 – 63.

M. Gardon and J. M. Guilemany, Journal of Materials Science 24 (2013) 1410 – 1421.

J. Janata and M. Josowicz, Nature Materials 2 (2003) 19 – 24.

H. Bai and G. Shi, Sensors, 7 (2007) 267 – 307.

T. Patois, J.-B. Sanchez, and F. Bergeretal, Talanta 17 (2013) 45 – 54.

Y.-S. Lee, B.-S. Joo, N.-J. Choi, J.-O. Lim, J.-S. Huh, and D.-D. Lee, Sensors and Actuators B 93 (2003) 148 – 152.

S. Basu and P. Bhattacharyya, Sensors and Actuators B 173 (2012) 1 – 21.

P. T. Yin, T. H. Kim, J. W. Choi, and K. B. Lee, Physical Chemistry Chemical Physics 15 (2013) 12785 – 12799.

B. H. Chu, J. Nicolosi, C. F. Lo, W. Strupinski, S. J. Pearton, and F. Ren, Electrochemical and Solid State Letters 14 (2011) K43 – K46.

M. Zhang and Z. Wang, Applied Physics Letters 102 (2013) 213104 – 213106.

Lam Minh Long, Nguyen Nang Dinh, Hoang Thi Thu, Huynh Tri Phong, and Tran Quang Trung, VNU Journal of Science.: Mathematics. –Physics, 33 (2017) 52 – 60.

Lam Minh Long, Nguyen Nang Dinh, Tran Quang Trung, Journal of Nanomaterials 2016 (2016) Article ID 5849018, 6 pages.

Tran Thị Thao, Tran Quang Trung, Vo-Van Truong, Nguyen Nang Dinh, Journal of Nanomaterials, 2015 (2015) Article ID 463565, 7 pages.

N. Abu-Zahra and M. Algazzar, Journal of Solar Energy Engineering, 136/2 (2013) 021023-1 ÷ 021023-7.

L. Stobinski, B. Lesiaka, A. Malolepszyc, M. Mazurkiewiczc and B. Mierzwaa, Journal of Electron Spectroscopy and Related Phenomena, 195 (2014) 145 – 154.

B. D. Cullity, Elements of X-Ray diffraction, 2nd ed., p. 102, Addison-Wesley Publishing Company, Inc., Reading, MA, 1978.

B. M. Omer, Journal of Nano and Electronic Physics, 5 (2013) 03010-1 ÷ 03010-4.

Y. Wang, L. Zhang, N. Hu, Ying Wang, Y. Zhang, Z. Zhou, Y. Liu, S. Shen, and C. Peng, Nanoscale Research Letters, 9 (2014) Article 251 (12p).

O. K. Varghese, P. D. Kichambre, D. Gong, K. G. Ong, E. C. Dickey, and C. A. Grimes, Sensors and Actuators B, 81 (2001) 32 – 41.

L. Aba, Y. Yusuf, Mitrayana, and K. Triyana, Journal of Modern Physics, 3 (2012) 529 – 533.

DOI: Display counter: Abstract : 326 views. PDF : 162 views.


  • There are currently no refbacks.

Editorial Office:

Communications in Physics

1st Floor, A16 Building, 18B Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 024 3791 7102 


Copyright by