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Related Experiment Video

Updated: May 30, 2026

Microfluidic Fabrication of Core-Shell Microcapsules carrying Human Pluripotent Stem Cell Spheroids
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Microfluidic Fabrication of Core-Shell Microcapsules carrying Human Pluripotent Stem Cell Spheroids

Published on: October 13, 2021

Surface wrinkling patterns on a core-shell soft sphere.

Bo Li1, Fei Jia, Yan-Ping Cao

  • 1Center for Nano and Micro Mechanics & Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University, Beijing, China.

Physical Review Letters
|July 21, 2011
PubMed
Summary
This summary is machine-generated.

Surface wrinkling on soft spheres transitions from buckyball patterns to labyrinth folds with increasing deformation. This study analyzes the complex dynamics of these pattern transformations under growth or shrinkage.

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Area of Science:

  • Soft matter physics
  • Materials science
  • Mechanics of materials

Background:

  • Surface instabilities in soft materials are crucial for understanding biological and engineered systems.
  • Spherical shells are common model systems for studying wrinkling and folding phenomena.

Purpose of the Study:

  • To investigate the three-dimensional surface wrinkling patterns of a core-shell soft sphere.
  • To analyze the transition from initial buckling patterns to complex folded structures.

Main Methods:

  • Buckling analysis
  • Postbuckling analysis
  • Computational modeling of soft sphere deformation

Main Results:

  • The sphere exhibits a buckyball-like wrinkling pattern at lower deformations.
  • A transition to labyrinth folded patterns occurs with increased deformation, matching experimental observations.
  • The transition involves dynamic polygon movement, rotation, and coalescence.

Conclusions:

  • Differential growth or shrinkage drives complex surface pattern evolution in soft spheres.
  • The study elucidates the mechanism behind the transition from wrinkling to folding.
  • Findings provide insights into the mechanics of pattern formation in soft materials.