Kinetics and Physicochemical Characteristics of Electrodeposited PEDOT:PSS Thin Film Growth

In bioelectronics, conducting polymer coatings allow the reduction of impedance metallic electrodes and facilitate translation bioelectrical signals at their interface. Such can be made using thin film deposition from a solution or direct synthesis via electrodeposition. The electrical control over offers possibility for fine-tuning film's thickness structure. However, mechanical stability such mainly suffer poor adhesion to electrode surface cracking. Here, an extended study on kinetics poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) electropolymerization evolution its physicochemical properties is provided. spectroscopy closely follows electrochemical variations during PEDOT:PSS's growth, described by modeled equivalent circuits. change polymerization in relation supporting size, chemistry, time. growth structures polymeric morphology confluent layer with strong increase before reaching failure. Before this point, remains stable hundred cycles applied potential strain defined redox window. These evaluations benchmark PEDOT:PSS toward electrochemically tunable transducers bioelectronics.