“Organic Bioelectronic Interfaces Based on PEDOT:PSS-Based Crystalline Films, Microfibers, and Fibrillar Hydrogel”
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, they 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 crystalline PEDOT:PSS microfibers for single-strand wearable electrochemical transistors, PEDOT:PSS-incorporated hydrogel microfibers for 3-D neuronal network reconstruct, and metal oxide transistor arrays for transparent direct cellular interfaces.
 Seong-Min Kim, Nara Kim, Youngseok Kim, Min-Seo Baik, Minsu Yoo, Dongyoon Kim, Won-June Lee, Dong-Hee Kang, Sohee Kim, Kwanghee Lee* and Myung-Han Yoon* NPG Asia Mater. doi:10.1038/s41427-018-0014-9 (2018) “Solution-Processed Conductive Polymer Cellular Interfaces for Direct Electrical Stimulation and Recording”
 Seong-Min Kim, Chang-Hyun Kim, Youngseok Kim, Nara Kim, Won-June Lee, Eun-Hak Lee, Dokyun Kim, Sungjun Park, Kwanghee Lee1, Jonathan Rivnay, and Myung-Han Yoon* Nature Comm. in press (2018) “Effect of PEDOT:PSS Film Microstructural Crystallinity and Composition on Electrochemical Transistor Performance and Long-Term Stability”
~ Coffee/tea will be served prior to lecture~