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Updated: Sep 10, 2025

Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique

Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique

Published on: March 24, 2023

Bioinspired Iontronic Pressure Sensor with Ultrawide Range and High Sensitivity.

Zijun Pan¹, Bolong Qin¹, Zhanghao Lin¹

¹School of Applied Physics and Materials, Jiangmen Key Laboratory of Micro-Nano Functional Materials and Devices, Wuyi University, Jiangmen 529020, P.R. China.

|August 21, 2025

Summary

This summary is machine-generated.

Researchers developed a bioinspired iontronic pressure sensor (IPS) overcoming sensitivity and range limitations. This flexible sensor mimics electric eels, offering high performance for human-machine interfaces and healthcare monitoring.

Keywords:

MXene bioinspired design iontronic pressure sensor silica aerogel wide detection range

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Area of Science:

Materials Science
Biomimetics
Sensor Technology

Background:

Flexible pressure sensors face a trade-off between sensitivity and detection range, limiting applications in human-machine interfaces and healthcare.
Existing sensors struggle with performance under demanding conditions, necessitating novel designs.

Purpose of the Study:

To develop a bioinspired iontronic pressure sensor (IPS) that overcomes the sensitivity-detection range limitations of conventional flexible pressure sensors.
To leverage the ion-mediated electrogenesis of electric eels for enhanced sensor performance.

Main Methods:

Coupling MXene-functionalized electrodes with a hierarchical silica aerogel/ionic liquid (ILA) dielectric.
Utilizing pressure-driven, reversible ion migration within the dielectric and enhancing electrical double-layer (EDL) formation.
Bioinspired design mimicking electric eel electrogenesis.

Main Results:

Achieved an ultrawide detection range up to 5.8 MPa.
Demonstrated high sensitivity (26,845 kPa⁻¹) within 400 kPa.
Exhibited rapid response (5 ms) and recovery (6 ms) times, over 10,000 loading cycles durability, and flame retardancy.

Conclusions:

The bioinspired IPS architecture effectively overcomes the sensitivity-detection range trade-off.
The sensor's capabilities enable monitoring of subtle physiological signals and complex human motions in harsh conditions.
This approach advances flexible pressure sensors for adaptive robotics, intelligent wearables, and healthcare diagnostics.