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Sensors 2019, 19(2), 317;

Carbon Nanotube/Graphene Nanoplatelet Hybrid Film as a Flexible Multifunctional Sensor

School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Department of Mechanical Engineering, Yuan Ze University, Chung-Li 320, Taiwan
Quanzhou Normal University, Quanzhou 362000, China
Authors to whom correspondence should be addressed.
Received: 5 December 2018 / Revised: 4 January 2019 / Accepted: 8 January 2019 / Published: 14 January 2019
(This article belongs to the Special Issue Carbon Nanotube Based Sensors)
PDF [2864 KB, uploaded 14 January 2019]


A flexible hybrid film consisting of graphene nanoplatelets (GNPs) and multi-walled carbon nanotubes (MWCNTs) was prepared and employed as a multifunctional sensor to monitor temperature and liquid leakage, based on the piezoresistive effect. The influences of the GNP content on the mechanical, thermal, and sensing properties were investigated. Experimental results showed that both the hardness and Young’s modulus of the hybrid film were decreased with an increasing GNP content, while the thermal conductivity exhibited in an opposite trend. The electrical resistance of the hybrid film decreased was linearly with an increase in temperature. The resistance change increased linearly with an increase of the solvent adsorption. These features demonstrated the potential applications of the hybrid film in the detection of temperature, and liquid leakage. The sensitivity of leakage detection is increasing with the increase of the GNP loading, while temperature sensitivity is in the opposite trend.
Keywords: carbon nanotubes; graphene nanoplatelet; piezoresistive effect; multifunctional sensor carbon nanotubes; graphene nanoplatelet; piezoresistive effect; multifunctional sensor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Huang, J.; Yang, X.; Her, S.-C.; Liang, Y.-M. Carbon Nanotube/Graphene Nanoplatelet Hybrid Film as a Flexible Multifunctional Sensor. Sensors 2019, 19, 317.

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