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Related Experiment Video

Updated: Sep 28, 2025

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
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Stretchable solvent-free ionic conductor with self-wrinkling microstructures for ultrasensitive strain sensor.

Ying Ou1, Tingting Zhao1, Yang Zhang1

  • 1Center for Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, P. R. China. dong@whut.edu.cn.

Materials Horizons
|April 1, 2022
PubMed
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This study introduces a novel stretchable, solvent-free ionic conductor with enhanced stability and sensitivity. The material achieves a high gauge factor (GF) of 7.03 at 100% strain, improving reliability for soft electronics and sensors.

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Stretchable ionic conductors are crucial for advanced sensing devices.
  • Existing materials often lack sufficient strain sensitivity and mechanical stability.
  • Low gauge factors (GF) limit the reliability of signal output in current conductors.

Purpose of the Study:

  • To develop a novel solvent-free ionic conductor with improved strain sensitivity and physicochemical stability.
  • To investigate the relationship between microstructure and ionic transport properties.
  • To explore the potential of the new conductor in soft electronics and iontronics.

Main Methods:

  • Preparation of a hybrid cross-linked polymer network with mobile ions.
  • Utilizing modulus mismatch during polymerization to create spontaneous reticular wrinkling microstructures with ion channels.

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  • Characterization of ionic conductivity, mechanical properties, and strain sensitivity.
  • Evaluation of self-healing and adhesion capabilities.

    • Main Results:

    • The novel conductor exhibits spontaneous reticular wrinkling microstructures that enhance mechanical stability and ion transport.
    • Achieved high ionic conductivity of 1.17 mS cm-1 at 15 °C.
    • Demonstrated excellent strain sensitivity with a gauge factor (GF) of 7.03 at 100% strain.
    • Exhibited perfect physicochemical stability, a wide operating temperature range, self-healable, and adhesion properties.

    Conclusions:

    • The developed solvent-free ionic conductor offers superior performance compared to existing materials.
    • The unique microstructure design effectively enhances both mechanical robustness and sensing capabilities.
    • The material shows significant promise for applications in soft electronics, iontronics, and wearable sensors for human motion evaluation.