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Updated: Jul 10, 2025

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
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Stretchable and Lithography-Compatible Interconnects Enabled by Self-Assembled Nanofilms with Interlocking

Xiang Li1,2, Yuxuan Lin1,2, Lei Cui1,2

  • 1School of Materials Science and Engineering, Nankai University, Tianjin 300350, P. R. China.

ACS Applied Materials & Interfaces
|November 21, 2023
PubMed
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This summary is machine-generated.

Researchers developed stretchable silver interconnects using a novel nanodielectric layer. This breakthrough enables high-density, deformable electronics with excellent conductivity and stretchability, paving the way for advanced flexible circuits.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • High-density integration of deformable electronics requires stretchable interconnects.
  • Achieving high-resolution patterning of stretchable conductors remains a significant challenge.

Purpose of the Study:

  • To develop a photolithographically patternable stretchable conductor with preserved conductivity and stretchability.
  • To investigate the effect of microscale feature dimensions on the performance of stretchable interconnects.

Main Methods:

  • Fabrication of silver and elastomeric nanodielectric films using layer-by-layer assembly.
  • Photolithographic patterning of self-assembled silver nanofilms interlocked by nanodielectrics.
  • Characterization of conductivity, stretchability, and crack propagation mechanisms.
Keywords:
interconnectsinterlocking interfaceslayer-by-layer assemblymetallic nanofilmsstretchable conductors

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Main Results:

  • As-fabricated silver nanofilms exhibit conductivity of 1.54 × 10^6 S m^-1 and stretchability of ~200% without annealing.
  • Photolithographically defined AgNP microstrips show enhanced stretchability at 100 μm widths due to confined cracks.
  • Serpentine architectures reduce resistance change in silver interconnects.

Conclusions:

  • A self-assembled silver nanofilm/elastomeric nanodielectric system enables high-resolution patterning of stretchable interconnects.
  • The nanodielectric layer effectively impedes crack propagation, enhancing mechanical robustness.
  • Demonstrated application as stretchable circuit boards for powering LEDs.