Flexible Piezoresistive Sensors from Polydimethylsiloxane Films with Ridge-like Surface Structures

Overview

Journal Micromachines (Basel)

Publisher MDPI

Date 2023 Oct 28

PMID 37893377

Authors

Ming Liu

Xianchao Liu

Fuqian Yang

Affiliations

Soon will be listed here.

Abstract

Developing flexible sensors and actuators is of paramount importance for wearable devices and systems. In this research, we developed a simple and facile technique to construct flexible piezoresistive sensors from polydimethylsiloxane films with ridge-like surface structures and laser-induced porous graphene. Using a replication strategy, we prepared the ridge-like surface structures from sandpapers. The piezoresistive sensors exhibit excellent sensitivity with a response time of less than 50 ms and long-term cyclic stability under mechanical loading. The smallest weight they can sense is ~96 mg. We demonstrated applications of the piezoresistive sensors in the sensing of bio-related activities, including muscle contraction, finger flexion, wrist flexion, elbow bending, knee bending, swallowing, respiration, sounds, and pulses.

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