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Energies 2019, 12(3), 557; https://doi.org/10.3390/en12030557

Direct Printing of a Multi-Layer Sensor on Pet Substrate for CO2 Detection

1
DIEEI University of Catania, v.le A. Doria 6, 95127 Catania, Italy
2
DII University of Catania, v.le A. Doria 6, 95127 Catania, Italy
*
Author to whom correspondence should be addressed.
Received: 20 December 2018 / Revised: 1 February 2019 / Accepted: 2 February 2019 / Published: 12 February 2019
(This article belongs to the Special Issue Robotics, Micronanosensor and Smart Devices for Control)
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Abstract

The use of inexpensive gas sensors is a real need for many applications requiring the use of disposable sensors. This work deals with the realization and characterization of a low cost CO2 sensor realized by rapid prototyping techniques. In particular, the sensor consists of a set of InterDigiTed electrodes, over which a double sensing layer made of PEDOT/PSS (CLEVIOS™ PHCV4, by H.C.Starck) and a solution of pristine graphene powder has been deposited. A silver nano-particle solution is used for inkjet printing the electrodes onto the PET (PolyEthylene Terephthalate) substrate, through a commercial inkjet printer. The sensing strategy is based on the variation of the electrical conductance of graphene due to gas molecules adsorption. The device responsivity observed in two different operating conditions (50 °C and 60 °C), is 4.0 µΩ/Ω/ppm and 4.7 µΩ/Ω/ppm. The corresponding values of the resolution are 400 ppm and 420 ppm. Main advantages of the developed sensor consist in the cost-effective fabrication techniques and the device flexibility, which are strategic for applications requiring disposable and shapeable devices to be installed into irregular surfaces. View Full-Text
Keywords: CO2 monitoring; inkjet printing; gas sensor; PEDOT/PSS; graphene; interdigited electrodes; flexible substrate CO2 monitoring; inkjet printing; gas sensor; PEDOT/PSS; graphene; interdigited electrodes; flexible substrate
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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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Andò, B.; Baglio, S.; Di Pasquale, G.; Pollicino, A.; Graziani, S.; Gugliuzzo, C.; Lombardo, C.; Marletta, V. Direct Printing of a Multi-Layer Sensor on Pet Substrate for CO2 Detection. Energies 2019, 12, 557.

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