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Engineering Liquid Metal Nanoparticles for Wearable Devices.

Yuxuan Chen1, Zhiheng Zhang1, Shan He1

  • 1Integrated Devices and Intelligent Diagnosis (ID2) Laboratory Biomedical Engineering Programme, School of Medicine, The Chinese University of Hong Kong, Shenzhen 518172, China.

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Summary
This summary is machine-generated.

Liquid metals (LMs) offer unique properties for advanced wearable devices. Surface engineering creates stable bioinks for applications in sensing, therapy, and drug delivery, though challenges in manufacturing and stability persist.

Keywords:
bioelectronicsbioinksliquid metal nanoparticlesliquid metalsmicroneedlespatchesskin-interfaced devicessurface modificationwearable devices

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Nanotechnology

Background:

  • Liquid metals (LMs) possess exceptional electrical and thermal conductivity, biocompatibility, and flexibility, making them ideal for wearable electronics.
  • Surface engineering of LMs with various agents enhances their stability, adhesion, and functionality for biomedical applications.
  • Microneedle and patch-based wearables are fabricated using LMs for diverse health monitoring and therapeutic purposes.

Purpose of the Study:

  • To review the current state of liquid metal-based wearable biomedical devices.
  • To highlight the fabrication strategies and biomedical applications of engineered liquid metal bioinks.
  • To identify existing challenges and propose future research directions in this field.

Main Methods:

  • Surface modification of liquid metals using ligands, polymers, and nanomaterials to create stable bioinks.
  • Integration of liquid metal bioinks into wearable device platforms (microneedles, patches) using advanced fabrication techniques.
  • Review of literature on the performance and applications of these devices in physiological monitoring, sensing, and therapy.

Main Results:

  • Engineered liquid metal bioinks demonstrate enhanced properties like oxidation resistance and adhesion.
  • Fabrication methods enable the creation of diverse microneedle and patch-based wearables.
  • Applications span physiological signal monitoring, sweat/temperature sensing, wound healing, antibacterial therapy, and drug delivery.

Conclusions:

  • Liquid metals are a promising material class for developing next-generation wearable biomedical devices.
  • Further research is needed to address challenges in application maturity, long-term stability, biocompatibility, and scalable manufacturing.
  • Continued innovation in surface engineering and fabrication holds potential for expanding the utility of LM-based wearables.