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Updated: Feb 2, 2026

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
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Flash-Induced Stretchable Cu Conductor via Multiscale-Interfacial Couplings.

Jung Hwan Park1, Jeongmin Seo2, Cheolgyu Kim2

  • 1Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro, Yuseong-gu Daejeon 34141 Republic of Korea.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 28, 2018
PubMed
Summary

Researchers developed a novel stretchable copper conductor using flash-induced tuning. This material exhibits excellent conductivity and over 20% stretchability, enabling applications like wireless near-field communication.

Keywords:
flash–material interactionsinterlockingstretchable conductorswireless communicationwrinkling

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Developing stretchable conductors is crucial for advanced electronic devices.
  • Existing materials often compromise conductivity or stretchability.

Purpose of the Study:

  • To create a novel stretchable copper (Cu) conductor with high conductivity and stretchability.
  • To investigate flash-induced multiscale tuning for material interface modification.

Main Methods:

  • Forming microscale wrinkled Cu on a polymer substrate using a single millisecond flash light pulse.
  • Utilizing nanoscale interlocking between Cu nanoparticles (NPs) and elastomer for enhanced adhesion.
  • Employing flash-induced photoreduction of CuO NPs and Cu NP welding for conductivity enhancement.
  • Modeling the 3D wrinkled Cu structure using finite element analysis simulations.

Main Results:

  • Achieved a stretchable Cu conductor with over 20% elongation capability in all directions.
  • Obtained excellent conductivity of approximately 37 kS cm⁻¹.
  • Demonstrated improved stability and stretchability due to nanoscale interlocking.
  • Successfully utilized the wrinkled Cu for wireless near-field communication on human skin.

Conclusions:

  • Flash-induced multiscale tuning is an effective method for creating high-performance stretchable conductors.
  • The developed Cu conductor offers a promising solution for wearable electronics and flexible devices.
  • The material's properties enable robust performance under strain and for wireless communication applications.