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Flexible Tactile Sensing Microfibers Based On Liquid Metals.

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Researchers developed flexible intelligent liquid metal (LM) fibers for wearable electronics. These conductive fibers function as sensors, heaters, and thermoelectric generators, paving the way for advanced smart textiles.

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Nanotechnology

Background:

  • Wearable electronics require advanced materials for functionality and flexibility.
  • Intelligent fibers are crucial for integrating electronics into textiles seamlessly.

Purpose of the Study:

  • To prepare flexible intelligent liquid metal (LM) fibers with a core-sheath structure.
  • To investigate the electrical and sensing properties of these novel LM fibers.

Main Methods:

  • Fabrication of LM fibers using ultra-thin liquid metal deposited on carbon/polyethylene terephthalate (C/PET) cores with polyvinyl alcohol/epoxy resin (PVA/EP) protective layers.
  • Characterization of fiber conductivity, resistance changes under torsion, and performance as electrical heaters, thermoelectric generators, strain sensors, and bending sensors.

Main Results:

  • Successfully manufactured four types of LM intelligent fibers (C-LM-PVA, C-LM-EP, PET-LM-PVA, PET-LM-EP) with diameters ranging from 150-600 μm.
  • Achieved high conductivity of 7.839 × 10^4 S·m^-1.
  • Demonstrated multifunctional capabilities including sensing, heating (36-36.9 °C), and thermoelectric generation.

Conclusions:

  • The developed flexible LM conductive fibers are suitable for intelligent wearable fabrics.
  • These fibers show significant potential for applications in artificial muscles and advanced sensor technologies.