Fig. 3: ISFET sensitivities with respect to their target ions. | Nature Communications

Fig. 3: ISFET sensitivities with respect to their target ions.

From: Selective ion sensing with high resolution large area graphene field effect transistor arrays

Fig. 3

a The channel current, Ids, of an Na+ ISFET versus Vref, for different Na+ molar concentrations. b Continuous real-time measurement of Ids for the same Na+ ISFET when increasing Na+ molar concentrations by half decade steps while keeping Vref = 0 V. c The changes in Vnp for the different ISFETs with respect to concentrations of their respective target ions, with a linear fit to extract their voltage sensitivities. d The changes in Ids for the different ISFETs with respect to concentrations of their respective target ions, with a linear fit to extract their current sensitivities.

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