A reference-less pH sensor based on an organic field effect transistor with tunable sensitivity

Spanu, A.;Viola, F.;Lai, S.;Cosseddu, P.;Ricci, P. C.;Bonfiglio, A.
2017

Abstract

Despite their great potentiality, ISFET-like devices generally suffer from an intrinsic limitation in sensitivity, the so-called Nernst limit. Moreover, the high costs, the restricted range of employable materials associated to the silicon technology, and the need for a reference electrode, have reduced the applicability of such devices in the bio-sensing field. In this work, we show how a reference-less pH sensor based on an organic semiconductor device, called Organic Charge-Modulated Field-Effect Transistor (OCMFET), besides being low cost, flexible, and transparent, shows a super-nernstian sensitivity with no need of any chemical modification of the sensing area. Moreover, thanks to its peculiar transduction principle and structure, the device sensitivity can be easily tuned by acting on geometry-related parameters of the device itself, introducing an interesting alternative approach for the realization of highly sensitive, reference-less, and low-cost devices for a wide range of bio-sensing applications.
2017
Inglese
48
188
193
6
www.elsevier.com/locate/orgel
Esperti anonimi
internazionale
scientifica
High-sensitivity sensors; Organic Charge Modulated FET; pH sensors; Electronic, Optical and Magnetic Materials; Biomaterials; Chemistry (all); Condensed Matter Physics; Materials Chemistry2506 Metals and Alloys; Electrical and Electronic Engineering
no
Spanu, A.; Viola, F.; Lai, S.; Cosseddu, P.; Ricci, P. C.; Bonfiglio, A.
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
6
reserved
File in questo prodotto:
File Dimensione Formato  
A050_pH Sensors_OrgEl.pdf

Solo gestori archivio

Tipologia: versione post-print
Dimensione 915.08 kB
Formato Adobe PDF
915.08 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Questionario e social

Condividi su:
Impostazioni cookie