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Fractal design concepts for stretchable electronics.

Jonathan A Fan1, Woon-Hong Yeo2, Yewang Su3

  • 11] Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 104 South Goodwin Ave, Urbana, Illinois 61801, USA [2] Beckman Institute for Advanced Science and Technology, 405 N. Mathews M/C 251, Urbana, Illinois 61801, USA [3].

Nature Communications
|February 11, 2014
PubMed

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Summary
This summary is machine-generated.

Researchers developed fractal patterns in hard electronic materials bonded to elastomers for advanced stretchable electronics. These novel designs enable conformal skin mounting and unique properties like MRI invisibility, paving the way for new applications.

Area of Science:

  • Materials Science
  • Electronics Engineering
  • Biomedical Engineering

Background:

  • Stretchable electronics offer unique integration capabilities with soft materials and curvilinear surfaces, expanding applications beyond conventional technologies.
  • Developing device architectures with both advanced electronic function and compliant mechanics is crucial for realizing the full potential of stretchable electronics.

Purpose of the Study:

  • To investigate the use of fractal patterns in hard electronic materials bonded to elastomers for novel stretchable device design.
  • To demonstrate the utility of various fractal constructs for creating space-filling electronic material structures.

Main Methods:

  • Patterning thin films of hard electronic materials, including monocrystalline silicon, into deterministic fractal motifs (e.g., Peano, Greek cross, Vicsek).

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  • Bonding these patterned fractal films to elastomers to create integrated hard-soft material systems.
  • Fabricating and testing devices such as electrophysiological sensors, precision monitors, actuators, and radio frequency antennas.

    • Main Results:

    • Fractal-based layouts enable unusual mechanics and space-filling structures, enhancing stretchable device capabilities.
    • Demonstrated functional devices including electrophysiological sensors, precision monitors, actuators, and radio frequency antennas.
    • Achieved conformal mounting on skin and unique properties like invisibility under magnetic resonance imaging (MRI).

    Conclusions:

    • Fractal-based designs represent a significant strategy for integrating hard electronic materials with soft substrates.
    • These findings open new avenues for advanced stretchable electronic applications requiring conformal integration and unique functionalities.
    • The developed approach facilitates the creation of sophisticated devices for healthcare, monitoring, and communication.