Bio?Inspired Adaptive Sensing through Electropolymerization of Organic Electrochemical Transistors

Organic electrochemical transistors are considered today as a key technology to interact with biological medium through their intrinsic ionic-electronic coupling. In this paper, the authors show how coupling can be finely tuned (in operando) post-microfabrication via electropolymerization technique. This strategy exploits concept of adaptive sensing where both transconductance and impedance tunable modified on-demand match different requirements. Material investigation Raman spectroscopy, atomic force microscopy, scanning electron microscopy reveals that lead fine control poly(3,4-ethylenedioxythiophene) (PEDOT) microdomains organization, which directly affects iono-electronic properties organic (OECTs). They further highlight volumetric capacitance effective mobility PEDOT:polystyrene sulfonate influence distinctively OECTs. approach shows improve by 150% while reducing variability 60% in comparison standard spin-coated Finally, they technique voltage spike rate hardware classification direct interest bio-signals sorting applications.