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Related Experiment Video

Updated: Feb 8, 2026

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

Published on: February 12, 2020

MXenes stretch hydrogel sensor performance to new limits.

Yi-Zhou Zhang¹, Kang Hyuck Lee¹, Dalaver H Anjum²

¹Physical Sciences and Engineering Division, Materials Science and Engineering Deparment, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia.

Science Advances

|June 21, 2018

Summary

MXene-based hydrogels offer superior performance for wearable strain sensors. These advanced hydrogel composites exhibit high sensitivity, stretchability, and self-healing properties, overcoming limitations of traditional hydrogels for electronic applications.

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Area of Science:

Materials Science and Engineering
Nanotechnology
Soft Robotics and Wearable Electronics

Background:

Wearable electronics, point-of-care testing, and soft robotics demand highly sensitive, stretchable, conformable, and self-healable strain sensors.
Conductive hydrogels are promising but often exhibit low sensitivity, hysteresis, and signal fluctuations due to viscoelasticity.

Purpose of the Study:

To develop advanced hydrogel composites for strain sensing applications that overcome the limitations of conventional hydrogels.
To investigate the potential of MXene (Ti₃C₂T_x) incorporation in hydrogels for enhanced sensing capabilities.

Main Methods:

Fabrication of MXene-based hydrogel composites (M-hydrogel).
Characterization of M-hydrogel's mechanical properties, including tensile strain sensitivity (gauge factor), stretchability, self-healing, conformability, and adhesiveness.
Evaluation of asymmetrical strain sensitivity (tensile vs. compressive) and exploitation of viscoelastic deformation for advanced sensing.

Main Results:

M-hydrogel achieved a gauge factor (GF) of 25 under tensile strain, 10 times higher than pristine hydrogel.
Exceptional stretchability exceeding 3400%, instantaneous self-healing, and excellent adhesion to various surfaces including skin.
Significantly higher sensitivity under compressive strain (GF of 80) compared to tensile strain, enabling detection of motion direction and speed.

Conclusions:

MXene incorporation dramatically enhances hydrogel performance for strain sensing applications.
The unique asymmetrical strain sensitivity and viscoelastic properties of M-hydrogel can be leveraged for advanced sensing functionalities.
This work presents a promising pathway for developing high-performance, adaptable hydrogel-based sensors.