제 목: Structure-Property Relations in Organic Mixed Ionic-Electronic Conductors and Their Unconventional Applications

■ 연 사: 윤명한 (GIST 신소재공학과 교수)

■ 일 시: 2026년 05월 12일(화) 오후 4시             

■ 장 소: W1(응용공학동) 1층 영상강의

■ 호 스 트: 정연식 교수님

■ Abstract : We report organic mixed ionic-electronic conductors 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 long-term stability in water for bioelectronic interfaces. Crystalline PEDOT:PSS films exhibit excellent electrical/electrochemical/optical properties, long-term aqueous stability, and good biocompatibility for primarily cultured cardiomyocytes and neurons over several weeks. Furthermore, they are successfully employed for high-performance multi-electrode arrays to record and stimulate the electrophysiological activities of primarily cultured cardiomyocytes and chicken retinae tissues. In parallel, crystalline PEDOT:PSS microfibers and their self-fusion process are developed for single-strand wearable electrochemical transistors and 3-D microfibrillar network-based bioelectronic interfaces. Finally, unconventional applications of crystallized PEDOT:PSS to energy storage, gas separation, electrocatalysis, and degradable/sustainable electronics are discussed.