Direct Printing of a Multi-Layer Sensor on Pet Substrate for CO 2 Detection

Bruno Andò, Salvatore Baglio, Giovanna Di Pasquale, Antonio Pollicino, Salvatore Graziani, Chiara Gugliuzzo, Cristian Lombardo and Vicenzo Marletta
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Bruno Andò: DIEEI University of Catania, v.le A. Doria 6, 95127 Catania, Italy
Salvatore Baglio: DIEEI University of Catania, v.le A. Doria 6, 95127 Catania, Italy
Giovanna Di Pasquale: DII University of Catania, v.le A. Doria 6, 95127 Catania, Italy
Antonio Pollicino: DII University of Catania, v.le A. Doria 6, 95127 Catania, Italy
Salvatore Graziani: DIEEI University of Catania, v.le A. Doria 6, 95127 Catania, Italy
Chiara Gugliuzzo: DII University of Catania, v.le A. Doria 6, 95127 Catania, Italy
Cristian Lombardo: DIEEI University of Catania, v.le A. Doria 6, 95127 Catania, Italy
Vicenzo Marletta: DIEEI University of Catania, v.le A. Doria 6, 95127 Catania, Italy

Energies, 2019, vol. 12, issue 3, 1-10

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 CO 2 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 µ?/?/ppm and 4.7 µ?/?/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.

Keywords: CO 2 monitoring; inkjet printing; gas sensor; PEDOT/PSS; graphene; interdigited electrodes; flexible substrate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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