Fig. 6.
Microfluidic devices employed for electrochemical detection. (a) Microfluidic device fabricated with PMMA and an 8 electrode array for simultaneous detection of biomarkers, employing offline capture of protein analytes. Unpublished photo by B.V.Chikkaveeraiah. (b) Paper-based microfluidic device for electrochemical detection. Adapted with permission from reference.92 (c) Paper based device for ECL sensor. Adapted with permission from reference.93 (d) 3D paper based ECL device with screen printed carbon working electrodes. The common Ag/AgCl reference and carbon counter electrodes are on another paper, and interface by stacking. Adapted with permission from reference.94 RE- reference electrode, CE- counter electrode, WE- working electrode.