Nowadays, we are assisting in the exceptional growth in research relating to the development of wearable devices for sweat analysis. Sweat is a biofluid that contains useful health information and allows a non-invasive, continuous and comfortable collection. For this reason, it is an excellent biofluid for the detection of different analytes. In this work, electrochemical sensors based on polyaniline thin films deposited on the flexible substrate polyethylene terephthalate coated with indium tin oxide were studied. Polyaniline thin films were abstained by the potentiostatic deposition technique, applying a potential of +2 V vs. SCE for 90 s. To improve the sensor perfor-mance, the electronic substrate was modified with reduced graphene oxide, obtained at a constant potential of −0.8 V vs. SCE for 200 s, and then polyaniline thin films were electrodeposited on top of the as-deposited substrate. All samples were characterized by XRD, SEM, EDS, static contact angle and FT-IR/ATR analysis to correlate the physical-chemical features with the performance of the sensors. The obtained electrodes were tested as pH sensors in the range from 2 to 8, showing good behavior, with a sensitivity of 62.3 mV/pH, very close to a Nernstian response, and a reproducibility of 3.8%. Interference tests, in the presence of competing ions, aimed to verify the selectivity, were also performed. Finally, a real sweat sample was collected, and the sweat pH was quantified with both the proposed sensor and a commercial pH meter, showing an excellent concordance.

Mazzara F., Patella B., D'agostino C., Bruno M.G., Carbone S., Lopresti F., et al. (2021). Pani-based wearable electrochemical sensor for ph sweat monitoring. CHEMOSENSORS, 9(7) [10.3390/chemosensors9070169].

Pani-based wearable electrochemical sensor for ph sweat monitoring

Mazzara F.
Primo
Membro del Collaboration Group
;
Patella B.
Membro del Collaboration Group
;
Bruno M. G.
Membro del Collaboration Group
;
Lopresti F.
Membro del Collaboration Group
;
Aiello G.
Membro del Collaboration Group
;
Inguanta R.
Membro del Collaboration Group
2021

Abstract

Nowadays, we are assisting in the exceptional growth in research relating to the development of wearable devices for sweat analysis. Sweat is a biofluid that contains useful health information and allows a non-invasive, continuous and comfortable collection. For this reason, it is an excellent biofluid for the detection of different analytes. In this work, electrochemical sensors based on polyaniline thin films deposited on the flexible substrate polyethylene terephthalate coated with indium tin oxide were studied. Polyaniline thin films were abstained by the potentiostatic deposition technique, applying a potential of +2 V vs. SCE for 90 s. To improve the sensor perfor-mance, the electronic substrate was modified with reduced graphene oxide, obtained at a constant potential of −0.8 V vs. SCE for 200 s, and then polyaniline thin films were electrodeposited on top of the as-deposited substrate. All samples were characterized by XRD, SEM, EDS, static contact angle and FT-IR/ATR analysis to correlate the physical-chemical features with the performance of the sensors. The obtained electrodes were tested as pH sensors in the range from 2 to 8, showing good behavior, with a sensitivity of 62.3 mV/pH, very close to a Nernstian response, and a reproducibility of 3.8%. Interference tests, in the presence of competing ions, aimed to verify the selectivity, were also performed. Finally, a real sweat sample was collected, and the sweat pH was quantified with both the proposed sensor and a commercial pH meter, showing an excellent concordance.
Settore ING-IND/23 - Chimica Fisica Applicata
Settore ING-IND/17 - Impianti Industriali Meccanici
Settore ING-IND/34 - Bioingegneria Industriale
Mazzara F., Patella B., D'agostino C., Bruno M.G., Carbone S., Lopresti F., et al. (2021). Pani-based wearable electrochemical sensor for ph sweat monitoring. CHEMOSENSORS, 9(7) [10.3390/chemosensors9070169].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/516601
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