As one of conducting polymers,PEDOT:PSS,is commonly used in organic electronics,especially for bioelectronics due to its advantages such as high electrical and ionic conductivity,solution-processability and biocompati...As one of conducting polymers,PEDOT:PSS,is commonly used in organic electronics,especially for bioelectronics due to its advantages such as high electrical and ionic conductivity,solution-processability and biocompatibility.Creating bioelectronics with the PEDOT:PSS requires advanced techniques to obtain physical/chemical modification of the PEDOT:PSS for improved performance and various applications.To satisfy these demands,fibrillary gelation of PEDOT:PSS by injection to choline acetate,an ionic liquid,with a constant flow rate was used in this study to make a conductive fiber and improve characteristics of PEDOT:PSS.Conductive fibers by fibrillary gelation showed enhanced electrical conductivity of about 400 S cm^(-1) and volumetric capacitance of about 154 F cm^(−3) which would be strongly beneficial to be utilized for organic electrochemical transistors(OECTs),resulting in a high transconductance of 19 mS in a depletion-mode.Moreover,dedoping of the conductive fibers by PEI(polyethyleneimine)enabled the creation of enhancement-mode OECTs.Interdigitated inverters were then fabricated by connecting depletion and enhancement-mode OECTs.These results demonstrate that these conductive fibers and electronic-textiles are suitable candidates for applications in bio-integrated electronics.展开更多
基金supported by the National Research Foundation (NRF)funded by the Korean government (MSIT) (NRF-2018M3A7B4071110,and NRF2020M3C1B8016137).
文摘As one of conducting polymers,PEDOT:PSS,is commonly used in organic electronics,especially for bioelectronics due to its advantages such as high electrical and ionic conductivity,solution-processability and biocompatibility.Creating bioelectronics with the PEDOT:PSS requires advanced techniques to obtain physical/chemical modification of the PEDOT:PSS for improved performance and various applications.To satisfy these demands,fibrillary gelation of PEDOT:PSS by injection to choline acetate,an ionic liquid,with a constant flow rate was used in this study to make a conductive fiber and improve characteristics of PEDOT:PSS.Conductive fibers by fibrillary gelation showed enhanced electrical conductivity of about 400 S cm^(-1) and volumetric capacitance of about 154 F cm^(−3) which would be strongly beneficial to be utilized for organic electrochemical transistors(OECTs),resulting in a high transconductance of 19 mS in a depletion-mode.Moreover,dedoping of the conductive fibers by PEI(polyethyleneimine)enabled the creation of enhancement-mode OECTs.Interdigitated inverters were then fabricated by connecting depletion and enhancement-mode OECTs.These results demonstrate that these conductive fibers and electronic-textiles are suitable candidates for applications in bio-integrated electronics.
