Abstract: A method of fabricating a micro-electrode array comprising the steps of coating an electrode with an insulating polymer coating by screen printing an insulating polymer onto the electrode and then curing said polymer; and sonically ablating the insulating polymer coating to produce a plurality of micro-pores.

Abstract: There is disclosed a sensor for an analyte comprising a working electrode assembly, itself comprising a micro-electrode array in which each micro-electrode is coated with a layer of redox state dependent conducting organic polymer, a counter electrode; a conductive medium containment into which the electrodes are disposed and a material for analysis may be introduced; means for applying an alternating electric polarizing potential across the electrodes; and means for detecting a variation in a conductimetric property across the {working electrode.fwdarw.counter electrode} plane in the presence of the analyte.