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Recent Progress of Liquid Metal-Based Electromagnetic Shielding Materials.

Jialu Suo1, Li Guan1,2, Peng Chen1

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Nanomaterials (Basel, Switzerland)
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Liquid metals (LM) offer advanced electromagnetic shielding solutions due to their conductivity and fluidity. Research explores LM scaffolds, blends, composites, and architectures for next-generation shielding applications.

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electromagnetic interference shieldinggallium-based liquid metalinterfacial polarization

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Electrical Engineering

Background:

  • Electromagnetic shielding materials are crucial for human health and information security.
  • Growing demands necessitate novel materials for effective electromagnetic radiation suppression.
  • Liquid metals (LM) possess unique properties like high conductivity and fluidity, making them promising for electromagnetic shielding.

Purpose of the Study:

  • To review and synthesize recent advancements in liquid metal-based electromagnetic shielding materials.
  • To clarify the classification of liquid metals and the principles of electromagnetic shielding.
  • To identify current challenges and future research directions in the field.

Main Methods:

  • Systematic literature review of liquid metal electromagnetic shielding.
  • Classification of liquid metals and electromagnetic shielding fundamentals.
  • Analysis of research based on four key design motifs: monolithic LM scaffolds, LM/conductive-filler blends, LM/magnetic particle composites, and architectured multifunctional architectures.

Main Results:

  • Liquid metals demonstrate significant potential for electromagnetic shielding applications.
  • Four primary design strategies for LM-based shields have been identified and analyzed.
  • Recent research highlights progress in developing novel LM-based shielding solutions.

Conclusions:

  • Liquid metal-based materials offer a promising pathway for advanced electromagnetic shielding.
  • Future development should focus on achieving ultra-lightweight, broadband, and intelligent LM electromagnetic shields.
  • Addressing current bottlenecks is essential for realizing the full potential of LM electromagnetic shielding technology.