Affiliation:
1. Graduate School of Engineering Tohoku University 6‐6‐11, Aramaki, Aoba Sendai 980‐8579 Japan
2. Department of Chemistry College of Science Rikkyo University 3‐34‐1, Nishi‐Ikebukuro, Toshima Tokyo 171‐8501 Japan
Abstract
AbstractWater‐resistant poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films are valuable in biomedical applications; however, they typically require crosslinkers to stabilize the films, which can introduce undesired aggregation or phase separation reactions. Herein, a dipping‐based process to prepare PEDOT:PSS films on nonplanar surfaces without crosslinker is developed. Sequential soaking of a dip‐coated PEDOT:PSS film in ethanol and water imparts water resistance to the film. Microscopic and spectroscopic techniques are used to monitor the process and confirm that the ethanol soaking elutes the excess PSS from the film bulk, which stabilizes the film prior to the water‐soaking process. The obtained films act as conductors and semiconductors on curved surfaces, including 3D‐printed objects. A film deposited on a curved surface is successfully applied as the channel layer in a neuromorphic organic electrochemical transistor. This approach can enable integrated bioelectronic and neuromorphic applications that can be readily deployed for facile prototyping.
Funder
Amano Institute of Technology
Subject
Materials Chemistry,Polymers and Plastics,Organic Chemistry,General Chemical Engineering