Fig. 6: Integrated textile microfluidics K+ sensor.
From: Vertical textile microfluidics: advancing on-garment sweat sampling for real-time biosensing
A Screen-printed OECT device integrated into the microfluidics’ E module. Inset: the magnified image of the channel and gate electrodes of the OECT, scale bar represents 1 mm. B Picture of the microfluidics analytical module while twisting to appreciate its conformability and mechanical stability. C Graphical representation of the OECT device architecture, operation, and functionalization as a K+ sensor. D Transfer sweeps of the non-functionalized OECT (ISM-free) and of the functionalized (ISM) recorded at VD = −0.4 V. E I-V output curves of the ISM and ISM-free OECTs. F Current modulation curves where the data points represent the measured current at the equilibrium of real-time measurements (inset) upon the addition of NaCl and KCl concentrations. The calibration curves are obtained by the linear fitting (R2(K+) = 0.96, R2(Na+) = 0.91); error bars represent the standard errors over three measurements on three different devices.
