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Related Concept Videos

Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
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Surface Embedded Metal Nanowire-Liquid Metal-Elastomer Hybrid Composites for Stretchable Electronics.

Darpan Shukla1, Hongyu Wang1, Omar Awartani2

  • 1Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States.

ACS Applied Materials & Interfaces
|March 8, 2024
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We developed novel silver nanowire-liquid metal hybrid composites for stretchable electronics. These materials offer stable electrical conductivity under strain, outperforming existing options and enabling new applications.

Keywords:
hybrid compositeintermetallic alloyliquid metalsilver nanowiresinteringstretchable electronics

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Science

Background:

  • Liquid metal (LM) alloys and metallic filler composites are key stretchable conductors.
  • LM alloys have high deformability but are difficult to pattern; metallic fillers degrade conductivity under strain.

Purpose of the Study:

  • To create and characterize silver nanowire (AgNW)-LM-elastomer hybrid composites.
  • To investigate the process-structure-property relationships of sequential and mixed fabrication methods.

Main Methods:

  • Fabrication of AgNW-LM-elastomer hybrid composites using sequential and mixed approaches.
  • Investigating the electromechanical performance and material properties under varying strain.
  • Characterizing the formation of intermetallic compounds and their impact on properties.

Main Results:

  • Hybrid composites exhibit tunable conductivity based on AgNW:LM ratios.
  • Sequential fabrication yields superior electromechanical stability, with minimal resistance increase (2.04% at 90% strain) for a 1:2.4 (AgNW:LMP w/w) composite.
  • Formation of AgIn2 intermetallic compounds in the sequential approach enhances deformability and mechanical robustness.

Conclusions:

  • AgNW-LM-elastomer hybrid composites offer a promising solution for stable, stretchable conductors.
  • The sequential fabrication method is advantageous for achieving high electromechanical stability and durability.
  • Demonstrated applications include stretchable heaters and circuits for wearable electronics.