Referenceless pH Sensor using Organic Electrochemical Transistors

Gaetan Scheiblin (1, 2) , Romain Coppard (2, 3) , Roisin M. Owens , Pascal Mailley (1) , George G. Malliaras (2)

1 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
2 EMSE
3 LITEN - Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux

Using printing techniques, organic electrochemical transistors are integrated in a differential bridge. This circuit allows biochemical sensing without the use of a reference electrode. Electrodeposited iridium oxide gate electrodes enable pH measurements with increased sensitivity, also demonstrated in complex biological media such as human sweat.

Domains: Engineering Sciences [physics]

Gaetan Scheiblin, Romain Coppard, Roisin M. Owens, Pascal Mailley, George G. Malliaras. Referenceless pH Sensor using Organic Electrochemical Transistors. Advanced Materials Technologies, 2017, 2 (2), ⟨10.1002/admt.201600141⟩. ⟨cea-02202412⟩