Organic Bioelectronic Interfaces Based on PEDOT:PSS-Based Crystalline Films, Microfibers, and Fibrillar Hydrogel
Myung-Han Yoon a
a School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
Proceedings of International Conference on Advances in Organic and Hybrid Electronic Materials (AOHM19)
Dubrovnik, Croatia, 2019 March 17th - 20th
Organizers: Alejandro Briseno, Thuc-Quyen Nguyen and Natalie Stingelin
Oral, Myung-Han Yoon, presentation 034
DOI: https://doi.org/10.29363/nanoge.aohm.2019.034
Publication date: 8th January 2019

In this research, we developed organic bioelectronic interfaces based on highly crystalline poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) films or microfibers to overcome the trade-off between electrical/electrochemical performance and aqueous stability. Crystalline PEDOT:PSS films exhibits excellent electrical/electrochemical/optical characteristics, long-term aqueous stability without film dissolution/delamination, and good viability for primarily cultured cardiomyocytes and neurons over several weeks. Furthermore, the consequent cellular electrodes based on crystalline PEDOT:PSS films show good cell/tissue adhesion, dramatically enlarged surface areas, and electrochemical capacitance, which are successfully employed for PEDOT:PSS-based multi-electrode arrays (MEAs) to record and stimulate the activities of primarily cultured cardiomyocytes and chicken retinae tissues. In parallel, we developed that crystalline PEDOT:PSS microfibers with high electrical conductivity and aqueous stability can be formed using strong acid-based coagulation media and employed for single-strand wearable sweat sensors in the configuration of organic electrochemical transistor and volumetric ion storage devices with arbitrary 3-D shapes. Finally, we demonstrated that electrochemically active PEDOT:PSS can be incorporated into hydrogel microfibers, which can be beneficial for 3-D neuronal cell cultures.      

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