Synthesis, Characterization and Performance Enhancement of Dry Polyaniline-Coated Neuroelectrodes for Electroencephalography Measurement Publisher



Aghazadeh H¹ ; Yazdi MK² ; Kolahi A¹ ; Yekani M³ ; Zarrintaj P⁴ ; Ramsey JD⁴ ; Ganjali MR^{2, 5} ; Stadler FJ⁶ ; Saeb MR⁷ ; Mozafari M⁸ Show Affiliations
Source: Current Applied Physics Published:2021

Abstract

Originating from a combination of neuroscience and biomedical engineering strategies, neuroprosthetics are developed as substitutes for sensory or cognitive modality damages caused by an injury or a disease. Dry electrodes are essential devices for monitoring of the biopotential such as electroencephalography (EEG) and electrocardiography (ECG). In this paper, polyaniline (PANI) coated stainless steel (SS) electrodes have been fabricated using in-situ electrochemical polymerization on the SS surface. The SEM images showed the formation of a nanoporous PANI-coating on the SS electrodes. EIS measurements on a skin model demonstrated a significantly lower contact impedance for the PANI-coated electrodes compared to bare SS electrodes. Furthermore, increasing the thickness of the nanoporous coating resulted in a higher contact impedance reduction. The comparison of the EEG measurements for the manufactured electrodes with conventional wet Ag/AgCl electrodes showed that the electrodes could successfully monitor alpha rhythms and muscle artifacts, as well. The prepared electrode can be used in various applications such as biopotential monitoring. © 2021 Korean Physical Society