Bioinspired Passive Tactile Sensors Enabled by Reversible Polarization of Conjugated Polymers  

作　　者：Feng He Sitong Chen Ruili Zhou Hanyu Diao Yangyang Han Xiaodong Wu 

机构地区：[1]School of Mechanical Engineering,Sichuan University,Chengdu 610065,People’s Republic of China [2]School of Software Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,People’s Republic of China [3]State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第1期361-377,共17页纳微快报（英文版）

基　　金：financially supported by the Sichuan Science and Technology Program(2022YFS0025 and 2024YFFK0133);supported by the“Fundamental Research Funds for the Central Universities of China.”。

摘　　要：Tactile perception plays a vital role for the human body and is also highly desired for smart prosthesis and advanced robots.Compared to active sensing devices,passive piezoelectric and triboelectric tactile sensors consume less power,but lack the capability to resolve static stimuli.Here,we address this issue by utilizing the unique polarization chemistry of conjugated polymers for the first time and propose a new type of bioinspired,passive,and bio-friendly tactile sensors for resolving both static and dynamic stimuli.Specifically,to emulate the polarization process of natural sensory cells,conjugated polymers(including poly(3,4-ethylenedioxythiophen e):poly(styrenesulfonate),polyaniline,or polypyrrole)are controllably polarized into two opposite states to create artificial potential differences.The controllable and reversible polarization process of the conjugated polymers is fully in situ characterized.Then,a micro-structured ionic electrolyte is employed to imitate the natural ion channels and to encode external touch stimulations into the variation in potential difference outputs.Compared with the currently existing tactile sensing devices,the developed tactile sensors feature distinct characteristics including fully organic composition,high sensitivity(up to 773 mV N^(−1)),ultralow power consumption(nW),as well as superior bio-friendliness.As demonstrations,both single point tactile perception(surface texture perception and material property perception)and two-dimensional tactile recognitions(shape or profile perception)with high accuracy are successfully realized using self-defined machine learning algorithms.This tactile sensing concept innovation based on the polarization chemistry of conjugated polymers opens up a new path to create robotic tactile sensors and prosthetic electronic skins.

关 键 词：Passive tactile sensors Reversible polarization of conjugated polymers Tactile perception Machine learning algorithm Object recognition 

分 类 号：TQ317[化学工程—高聚物工业] TP212[自动化与计算机技术—检测技术与自动化装置]