Bioinspired Pedot:Pss-Pvdf(Hfp) Flexible Sensor for Machine-Learning-Assisted Multimodal Recognition

作     者：Wu, Pingping Shao, Songtao Liu, Junchao Li, Lin Wang, Jingxia 

作者机构：School of Chemistry and Chemical Engineering Xi′an University of Architecture and Technology Xi′an710055 China CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China School of Mathematics Data Science Shaanxi University of Science and Technology Xi'An710021 China School of Sciences Xi’an University of Technology Xi’an710048 China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Piezoelectricity 

摘      要：Multifunctional flexible sensor (E-Skin) plays an important role in artificial intelligence. Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) has been proven to be a promising material for developing flexible sensors due to its high conductivity, ease of processing, biocompatibility, and low cost-effectiveness. However, existing PEDOT:PSS sensors only perceive external stimuli, lacking the intelligent extraction of stimulus information and accurate recognition of multimodal applications. Here, inspired by human skin, a double-layer structure PEDOT:PSS-PVDF(HFP) film (P-P film) is fabricated based on the synchronous induction effect of dimethyl sulfoxide. The P-P film presents excellent conductivity, piezoelectricity, and humidity sensitivity owing to the conformational transition (benzene-quinone) of PEDOT and piezoelectricity enhancement (β-phase) of polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF(HFP)). The bioinspired sensor assembled with P-P film shows multimodal applications, such as surface contact modal for movement monitoring (strain sensing), point contact modal for touch device (pressure sensing), and non-contact modal for self-protection (humidity sensing). The machine learning is further used to intelligently extract/analyze different sensing features, and the sensor achieves a high recognition rate for multimodal applications (97.46%). This work provides a distinctive approach in multifunctional applications of PEDOT:PSS flexible sensors and offers essential research value for the material structures, mechanical properties and application platforms of E-Skin. © 2024, The Authors. All rights reserved.