Engineering and Technology

A dual-mode fiber-shaped flexible capacitive strain sensor fabricated by direct ink writing technology for wearable and implantable health monitoring applications

C. Zhang, W. Ouyang, et al.

This innovative research by Chi Zhang, Wenyu Ouyang, Lei Zhang, and Dachao Li showcases a cutting-edge fiber-shaped flexible capacitive strain sensor, capable of extraordinary strain detection across a wide range. Its remarkable sensitivity and low detection limits open new frontiers in wearable and implantable health monitoring.

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Playback language: English

Index

Abstract

This paper presents a fiber-shaped flexible capacitive strain sensor (FSFCSS) fabricated using direct ink writing (DIW) technology. The sensor consists of parallel helical Ag electrodes printed onto a TPU tube fiber and encapsulated with BTO@Ecoflex. This design enables dual-mode strain sensing: axial tensile strain and radial expansion strain. The FSFCSS demonstrates a wide detection range (178%), high sensitivity (0.924 for axial strain, 0.00086 mmHg⁻¹ for radial strain), low detection limit (0.6%), and low hysteresis (1.44%). Applications in wearable and implantable health monitoring, including blood pressure and heart rate measurement, are demonstrated.

Publisher

Microsystems & Nanoengineering

Published On

Authors

Chi Zhang, Wenyu Ouyang, Lei Zhang, Dachao Li

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