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Related Experiment Videos

Geometry-dependent stripe rearrangement processes induced by strain on preordered microwrinkle patterns.

Takuya Ohzono1, Masatsugu Shimomura

  • 1Dissipative-Hierarchy Structures Laboratory, Spatio-Temporal Function Materials Research Group, Frontier Research System, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. ohzono@riken.jp

Langmuir : the ACS Journal of Surfaces and Colloids
|July 27, 2005
PubMed
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Soft elastomer surfaces with microwrinkle patterns exhibit reversible stripe rearrangement under strain. Applied strain causes one-dimensional stripes to align perpendicularly, forming domains that grow and change shape based on strain angle and stripe wavelength.

Area of Science:

  • Materials Science
  • Mechanics of Materials
  • Surface Science

Background:

  • Soft elastomers with patterned surfaces are crucial for various applications.
  • Understanding strain-induced pattern evolution is key to controlling material behavior.

Purpose of the Study:

  • To investigate the fundamental buckling and stripe rearrangement phenomena in preordered microwrinkle patterns on elastomer surfaces.
  • To elucidate the relationship between applied strain, stripe orientation, and domain formation.

Main Methods:

  • Utilizing a metal-capped soft elastomer with a preordered microwrinkle pattern.
  • Applying lateral compressive strain at varying angles relative to the initial stripe orientation.
  • Observing and analyzing the reversible stripe rearrangement and domain evolution processes.

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Main Results:

  • Preordered one-dimensional stripes reversibly align perpendicular to the applied strain direction.
  • The film surface decomposes into domains with original and new stripe orientations.
  • Domain shapes are characterized by parallelogram units dependent on strain angle and stripe wavelength.
  • Domain growth occurs in specific directions dictated by the unit shape.

Conclusions:

  • The study reveals elementary buckling mechanisms governing strain-induced stripe rearrangement.
  • The findings provide insights into controlling surface patterns on soft elastomers through mechanical strain.
  • This work contributes to the fundamental understanding of pattern evolution in soft materials.