Electrochemically synthesized PANI-MnO _2 coatings and their effect on interface properties of neural microelectrode

Abstract

In this paper, a simple and low-cost method for improving the performance of the neural microelectrodes is reported. The electrochemical polymerization of conducting polymer PANI and MnO _2 (manganese dioxide) were performed to modify the surface of the microelectrode

sites, then the morphology and electrical properties of the coated microelectrodes were investigated to analysize the influence of MnO _2

doping on the PANI coating. Results show that, the surface morphology of PANI coating was improved by MnO _2 doping. Compared to the electrode with PANI, the charge injection capacity of the electrode with PANI-MnO _2 increased by about 7-fold and the impedance decreased

to the original 1/6 (@ 1 KHz). The electrical properties were more stable and excellent with PANI-MnO _2 coating.