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Open AccessArticle

P3HT Processing Study for In-Liquid EGOFET Biosensors: Effects of the Solvent and the Surface

1
Department of Applied Science and Technology (DISAT), Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
2
Istituto Italiano di Tecnologia, Center for Sustainable Future Technologies, Via Livorno 60, 10144 Torino, Italy
3
Istituto dei Materiali per l’Elettronica ed il Magnetismo, IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(20), 4497; https://doi.org/10.3390/s19204497
Received: 29 August 2019 / Revised: 11 October 2019 / Accepted: 14 October 2019 / Published: 17 October 2019
In-liquid biosensing is the new frontier of health and environment monitoring. A growing number of analytes and biomarkers of interest correlated to different diseases have been found, and the miniaturized devices belonging to the class of biosensors represent an accurate and cost-effective solution to obtaining their recognition. In this study, we investigate the effect of the solvent and of the substrate modification on thin films of organic semiconductor Poly(3-hexylthiophene) (P3HT) in order to improve the stability and electrical properties of an Electrolyte Gated Organic Field Effect Transistor (EGOFET) biosensor. The studied surface is the relevant interface between the P3HT and the electrolyte acting as gate dielectric for in-liquid detection of an analyte. Atomic Force Microscopy (AFM) and X-ray Photoelectron Spectroscopy (XPS) characterizations were employed to study the effect of two solvents (toluene and 1,2-dichlorobenzene) and of a commercial adhesion promoter (Ti Prime) on the morphological structure and electronic properties of P3HT film. Combining the results from these surface characterizations with electrical measurements, we investigate the changes on the EGOFET performances and stability in deionized (DI) water with an Ag/AgCl gate electrode. View Full-Text
Keywords: biosensor; bioelectronics; EGOFET biosensor; bioelectronics; EGOFET
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MDPI and ACS Style

Parmeggiani, M.; Verna, A.; Ballesio, A.; Cocuzza, M.; Piatti, E.; Fra, V.; Pirri, C.F.; Marasso, S.L. P3HT Processing Study for In-Liquid EGOFET Biosensors: Effects of the Solvent and the Surface. Sensors 2019, 19, 4497. https://doi.org/10.3390/s19204497

AMA Style

Parmeggiani M, Verna A, Ballesio A, Cocuzza M, Piatti E, Fra V, Pirri CF, Marasso SL. P3HT Processing Study for In-Liquid EGOFET Biosensors: Effects of the Solvent and the Surface. Sensors. 2019; 19(20):4497. https://doi.org/10.3390/s19204497

Chicago/Turabian Style

Parmeggiani, Matteo; Verna, Alessio; Ballesio, Alberto; Cocuzza, Matteo; Piatti, Erik; Fra, Vittorio; Pirri, Candido F.; Marasso, Simone L. 2019. "P3HT Processing Study for In-Liquid EGOFET Biosensors: Effects of the Solvent and the Surface" Sensors 19, no. 20: 4497. https://doi.org/10.3390/s19204497

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