Planar reference electrodes on multielectrode arrays for electrochemical measurements of ionic currents
Article first published online: 10 APR 2013
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
physica status solidi (a)
Volume 210, Issue 5, pages 892–897, May 2013
How to Cite
Schnitker, J., Afanasenkau, D., Wolfrum, B. and Offenhäusser, A. (2013), Planar reference electrodes on multielectrode arrays for electrochemical measurements of ionic currents. Phys. Status Solidi A, 210: 892–897. doi: 10.1002/pssa.201200850
- Issue published online: 17 MAY 2013
- Article first published online: 10 APR 2013
- Manuscript Accepted: 30 NOV 2012
- Manuscript Received: 12 OCT 2012
- ionic membrane currents;
- multielectrode arrays;
- planar reference electrodes
We describe the fabrication process and characterization of polymer coated multielectrode array chips featuring 64 planar Ag/AgCl electrodes for electrophysiological and electrochemical measurements of ionic currents. The multielectrode chip consists of platinum feedlines and microelectrodes fabricated on an oxidized silicon substrate. The feed lines are passivated with a polyimide layer. Silver is deposited electrochemically on the platinum electrodes and chlorinated afterwards resulting in stable micro Ag/AgCl reference electrodes that are recessed within picoliter cavities. We envisage the chip as a platform for high-throughput investigation of lipid bilayers.
Schematics of a planar reference electrode. The chips are processed on oxidized silicon (blue) and consist of Pt feedlines (yellow), the Ag/AgCl electrode (black) passivated with polyimide (light blue).