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Intrinsically Stretchable Biphasic (Solid-Liquid) Thin Metal Films.

Arthur Hirsch1, Hadrien O Michaud1, Aaron P Gerratt1

  • 1Bertarelli Foundation Chair in Neuroprosthetic Technology, Laboratory for Soft Bioelectronic Interfaces, Institute of Microengineering, Institute of Bioengineering, Centre for Neuroprosthetics, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland.

Advanced Materials (Deerfield Beach, Fla.)
|March 1, 2016
PubMed
Summary
This summary is machine-generated.

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Researchers created stretchable conductors using gallium deposition on metal films. These novel liquid metal circuits offer low resistance and high stretchability for robust soft electronics.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Development of advanced materials for flexible and stretchable electronics is crucial.
  • Existing conductive materials often lack sufficient mechanical robustness or electrical performance under strain.
  • Need for scalable and reliable methods to fabricate stretchable conductive films.

Purpose of the Study:

  • To develop a novel method for creating stretchable biphasic conductors.
  • To characterize the electrical and mechanical properties of these new conductors.
  • To demonstrate the potential applications in soft electronic devices.

Main Methods:

  • Utilizing physical vapor deposition to deposit gallium onto an alloying metal film.
  • Employing photolithography for patterning the thin metal films.
Keywords:
elasticityelastomerselectrical conductivityliquid metalsthin metal films

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  • Characterizing sheet resistance and stretchability of the fabricated conductors.

    • Main Results:

    • Achieved low sheet resistance of 0.5 Ω sq(-1).
    • Demonstrated significant stretchability up to 400%.
    • Fabricated photolithography-compatible thin metal films.

    Conclusions:

    • The novel deposition and patterning approach enables robust, multilayer soft circuits.
    • These stretchable conductors are suitable for advanced sensors and actuators.
    • This technique opens new possibilities for designing and manufacturing soft electronic systems.