Journal article
Rapid electrophoretic deposition of biocompatible graphene coatings for high-performance recording neural electrodes
M Dong, HA Coleman, MA Tonta, Z Xiong, D Li, S Thomas, M Liu, JB Fallon, HC Parkington, JS Forsythe
Nanoscale | ROYAL SOC CHEMISTRY | Published : 2022
DOI: 10.1039/d2nr04421h
Abstract
The electrical and biological interfacial properties of invasive electrodes have a significant impact on the performance and longevity of neural recordings in the brain. In this study, we demonstrated rapid electrophoretic deposition and electrochemical reduction of graphene oxide (GO) on metal-based neural electrodes. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and other characterizations confirmed the existence of a uniform and effectively reduced graphene oxide coating. Electrochemically reduced graphene oxide (ErGO) coated Pt/Ir neural electrodes exhibited 15.2-fold increase in charge storage capacity (CSC) and 90% decrease in impedance with only 3.8% incre..
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Awarded by Australian Research Council
Funding Acknowledgements
This work was funded by the NHMRC of the Australian Government (APP1122055). The Bionics Institute acknowledges support of the Victorian Government through Operational Infrastructure Support Program. D. L. acknowledges the support from the Australian Research Council under the Australian Laureate Fellowship scheme (FL180100029). The authors acknowledge the use of facilities within Monash Micro Imaging. The authors also acknowledge use of the facili-ties and the assistance of Yvonne Hora and Jisheng Ma at the Monash X-ray Platform. The authors also acknowledge the use of the instruments and scientific and technical assistance of Xiya Fang at the Monash Centre for Electron Microscopy, a Node of Microscopy Australia. Special thanks to Kun Zhou for providing valuable information on the analysis of XPS data. We are thankful for Jason B. Marroquin for the training on electrochemistry and cell culture.