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Area of Science:

  • Materials Science
  • Nanotechnology
  • Wearable Technology

Background:

  • Liquid metals (LMs) possess unique electrical and mechanical properties ideal for stretchable electronics.
  • Challenges with bulk LMs, such as processing difficulties and instability, limit their use in wearable sensors.
  • Liquid metal particles (LMPs) encapsulated by oxide shells provide a stable and versatile alternative for composite materials.

Purpose of the Study:

  • To review fabrication methods and functional properties of liquid metal-based composites.
  • To highlight applications of these composites in wearable sensing technologies.
  • To discuss advancements in physical motion and electrophysiological signal monitoring using LM composites.

Main Methods:

  • Encapsulation of liquid metals into particles (LMPs).
  • Fabrication of hybrid composites using LMPs with various fillers (metal, carbon, polymers).
  • Characterization of electrical and mechanical properties of the developed composites.

Main Results:

  • LM-based hybrid composites demonstrate enhanced electrical conductivity and mechanical properties.
  • Conductive networks can be formed without sintering, simplifying processing.
  • Composites exhibit multifunctional properties including self-healing, EMI shielding, and recyclability.

Conclusions:

  • LM composites are highly promising for next-generation wearable sensors.
  • Applications span physical motion monitoring (strain, pressure) and electrophysiological signal recording (EMG, ECG).
  • Further research is needed to address key challenges and unlock future opportunities in wearable platforms.