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Highly Stretchable Electrodes on Wrinkled Polydimethylsiloxane Substrates.

Jun Tang1,2, Hao Guo1,2, Miaomiao Zhao1,2

  • 1Science and Technology on Electronic Test &Measurement Laboratory, Ministry of Education, Shanxi, 030051, China.

Scientific Reports
|November 21, 2015
PubMed
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Researchers developed a new fabrication method for highly stretchable silver (Ag) wrinkled electrodes, achieving 200% strain limits for advanced wireless sensors. This breakthrough enables stable electrical performance in wearable electronics.

Area of Science:

  • Materials Science
  • Electrical Engineering
  • Nanotechnology

Background:

  • Development of stretchable electronics is crucial for wearable devices.
  • Existing stretchable conductors often face challenges with stability and adhesion under strain.
  • Need for robust electrode materials compatible with micro/nano fabrication.

Purpose of the Study:

  • To demonstrate a fabrication technology for silver (Ag) wrinkled electrodes.
  • To achieve high stretchability and stable electrical properties for wireless sensors.
  • To enable integration with established micro/nano fabrication processes.

Main Methods:

  • Fabrication of Ag wrinkled thin films via vacuum deposition on pre-strained polydimethylsiloxane (PDMS) substrates.
  • Surface treatment of PDMS using O2 plasma and chemical functionalization.

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  • Characterization of electrode strain limits, adhesion, and electrical stability (resistors, inductors, capacitors).

    • Main Results:

    • Achieved a strain limit of up to 200% for Ag wrinkled electrodes.
    • Obtained a high surface adhesion area of 95%.
    • Demonstrated stable electrical characteristics of components under stretching with low temperature and humidity coefficients.

    Conclusions:

    • The developed Ag wrinkled electrode technology offers excellent stretchability and adhesion.
    • The electrodes maintain stable electrical performance, suitable for demanding sensor applications.
    • This fabrication approach is compatible with micro/nano fabrication, paving the way for advanced wearable electronics.