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A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
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Synthesizing a Healable Stretchable Transparent Conductor.

Junpeng Li1,2, Shuhua Qi2, Jiajie Liang1

  • 1†Department of Materials Science and Engineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, California 90095, United States.

ACS Applied Materials & Interfaces
|June 11, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel healable, stretchable, and transparent electrode using silver nanowires and a PEDOT layer on an elastomer substrate. This electrode demonstrates self-healing capabilities for both mechanical damage and fatigue, maintaining performance after repeated repairs.

Keywords:
PEDOT:PSShealablesilver nanowirestretchable composite electrodetransparent

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Science

Background:

  • Transparent conductive electrodes are crucial for flexible electronics.
  • Existing electrodes often lack durability and self-healing properties.
  • Developing robust and repairable transparent conductors remains a challenge.

Purpose of the Study:

  • To demonstrate a novel healable, stretchable, and transparent electrode.
  • To investigate the self-healing mechanism of the composite electrode.
  • To evaluate the electrode's performance under mechanical stress and damage.

Main Methods:

  • Fabrication of a composite electrode using silver nanowire (AgNW) network and poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT) hybrid layer on a Diels-Alder elastomer substrate.
  • Tuning nanowire-PEDOT bonding via ethanol-water wetting for large-strain prestretching.
  • Assessing electrode performance (sheet resistance, transmittance, stretchability) and self-healing capabilities after mechanical damage (cutting) and fatigue (100 cycles of 60% strain).

Main Results:

  • Achieved a figure-of-merit sheet resistance of 15 ohm/sq with 78% transmittance at 550 nm.
  • Demonstrated 100% stretchability.
  • Successfully healed razor blade cuts repeatedly (3 times) and fatigue-induced damages via simple heating.
  • Healed electrodes maintained similar resistance-strain response due to the PEDOT layer's ability to circumvent broken AgNW sites.

Conclusions:

  • The AgNW/PEDOT composite electrode offers excellent stretchability, transparency, and conductivity.
  • The demonstrated self-healing capability significantly enhances electrode durability and longevity.
  • This technology holds promise for advanced flexible and wearable electronic applications.