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Related Experiment Videos

Nested self-similar wrinkling patterns in skins.

Kirill Efimenko1, Mindaugas Rackaitis, Evangelos Manias

  • 1Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, USA.

Nature Materials
|March 8, 2005
PubMed
Summary

Artificial skins exhibit hierarchical wrinkling across multiple length scales, from nanometers to millimeters. This discovery enables novel applications in particle separation and self-assembly.

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Area of Science:

  • Materials Science
  • Soft Matter Physics
  • Surface Engineering

Background:

  • Stiff thin films on soft substrates are prevalent in nature (e.g., animal skin) and increasingly utilized in artificial systems.
  • Applications include flexible electronics, tunable diffraction gratings, and advanced metrology.

Purpose of the Study:

  • To investigate the hierarchical wrinkling patterns in model elastomeric artificial skins.
  • To elucidate the mechanism behind this complex surface morphology.
  • To explore potential applications of these wrinkled structures.

Main Methods:

  • Experimental observation of wrinkling patterns in artificial skin models.
  • Computational modeling to understand pattern formation.
  • Development of a scaling theory to quantify the phenomenon.

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Main Results:

  • Demonstration of hierarchical wrinkling across five orders of magnitude (nm to mm).
  • Identification of a self-similar buckling mechanism.
  • Quantification of experimental findings through computation and theory.

Conclusions:

  • Hierarchical wrinkling in artificial skins is a controllable phenomenon.
  • The wrinkled substrates can be harnessed for size-based particle separation.
  • Linear chains of monodisperse particles can be formed using these substrates.