Multifunctional Highly Sensitive Multiscale Stretchable Strain Sensor Based on a Graphene/Glycerol-KCl Synergistic Conductive Network

ACS Applied Materials & Interfaces
Chunrui LiuChuan Liu

Abstract

Stretchable strain sensors have promising applications in health monitoring and human motion detection. However, only a few of the strain sensors reported to date have exhibited a multiscale strain range and a high gauge factor simultaneously. As such, most strain sensors cannot be used in applications that require both high sensitivity and a multiscale strain range. In this work, we develop a wearable multifunctional strain sensor using graphene and a new ionic conductor as the sensing material and Ecoflex as the encapsulant. In the ionic conductor, KCl and glycerol are used as the electrolyte and solvent, respectively. This deformable ionic conductor connects cracked graphene sheets electronically, enabling the strain sensor to be stretched to 300% of its original length with a moderate gauge factor of 25.2. The sensor can respond to various mechanical deformations including stretching, bending, and pressing. When attached to human body, the sensor can monitor large-scale strains (>50%) for joint movement and small-scale strains (<10%) for facial expressions and pulses. When stretched, the sensor also shows good sensitivity in static temperature sensing. Therefore, this multifunctional stretchable sensor has good prospect of ...Continue Reading

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Citations

Aug 1, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Shan XiaGuanghui Gao
Apr 8, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Jin WuXing Lu
Jun 28, 2019·Frontiers in Chemistry·Haizhou HuangLitao Sun
Apr 24, 2021·Journal of Colloid and Interface Science·Han GaoQixian Zhang
Apr 9, 2021·Journal of Neural Engineering·Li-Wei KoShih-Hsun Chen
Jan 18, 2019·ACS Applied Materials & Interfaces·Jin WuGuo Ping Wang
Mar 5, 2020·ACS Applied Materials & Interfaces·Jingxian SunJun Nie
May 2, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Long ZhuBo Li
Sep 25, 2021·ACS Applied Materials & Interfaces·Fan HaoGuiping Ma
Jan 20, 2022·ACS Applied Materials & Interfaces·Hyun Jae LeeJunghoon Lee

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