Preprint Article Version 1 This version is not peer-reviewed

A Flexible Wearable Strain Sensor Based on Nano-Silver Modified Laser-Induced Graphene for Monitoring Hand MovementsCitation: To Be Added by Editorial Staff during Production

Version 1 : Received: 30 June 2024 / Approved: 1 July 2024 / Online: 1 July 2024 (08:09:42 CEST)

How to cite: Zhong, M.; Zou, Y.; Fan, H.; Li, S.; Zhao, Y.; Li, B.; Li, B.; Jiang, Y.; Xing, X.; Shen, J.; Zhou, C. A Flexible Wearable Strain Sensor Based on Nano-Silver Modified Laser-Induced Graphene for Monitoring Hand MovementsCitation: To Be Added by Editorial Staff during Production. Preprints 2024, 2024070026. https://doi.org/10.20944/preprints202407.0026.v1 Zhong, M.; Zou, Y.; Fan, H.; Li, S.; Zhao, Y.; Li, B.; Li, B.; Jiang, Y.; Xing, X.; Shen, J.; Zhou, C. A Flexible Wearable Strain Sensor Based on Nano-Silver Modified Laser-Induced Graphene for Monitoring Hand MovementsCitation: To Be Added by Editorial Staff during Production. Preprints 2024, 2024070026. https://doi.org/10.20944/preprints202407.0026.v1

Abstract

The advancement of performance in the domain of flexible wearable strain sensors has become increasingly significant due to extensive research on laser-induced graphene (LIG). An innovative doping modification technique is required owing to the limited progress achieved by adjusting laser parameters to enhance LIG’s performance. By pre-treating with AgNO3, we successfully manufactured LIG with a uniform dispersion of silver nanoparticles across its surface. The experimental results for the flexible strain sensor exhibit exceptional characteristics, including low resistance (183.4 Ω), high sensitivity (426.8), a response time of approximately 150 ms, and a relaxation time of about 200 ms. Moreover, this sensor demonstrates excellent stability under various tensile strains and remarkable repeatability during cyclic tests lasting up to 8,000 s. Additionally, this technique yields favorable results in finger bending and hand back stretching experiments, holding significant reference value for preserving the inherent characteristics of LIG preparation in a single-step and in situ manner.

Keywords

LIG; doping modification; silver nanoparticles; flexible wearable strain sensor; single-step in situ

Subject

Physical Sciences, Applied Physics

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