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A tissue membrane is a thin layer of cells that covers the outside of the body, the organs, internal passageways that lead to the exterior of the body, and the lining of the moveable joint cavities. There are two basic types of tissue membranes— connective tissue and epithelial membranes.
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A cell's plasma membrane demarcates the cell's borders and determines the nature of its interaction with the environment. Cells exclude certain substances, take in others, and excrete some others in controlled quantities. The plasma membrane must be flexible to allow certain cells, such as red and white blood cells, to change their shape while passing through narrow capillaries. These are the more obvious plasma membrane functions. In addition, the plasma membrane's surface carries...
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Wrinkling membranes with compliant boundaries.

Yuri Ebata1, Alfred J Crosby

  • 1Department of Polymer Science and Engineering, University of Massachusetts, 120 Governors Drive, Amherst, MA 01003, USA. Crosby@mail.pse.umass.edu.

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Summary

Researchers created novel wrinkled surfaces for technology by controlling wrinkling patterns. This method allows independent tuning of wrinkle wavelength and amplitude for applications in microfluidics and microelectronics.

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Nanotechnology

Background:

  • Wrinkled patterns are crucial for advanced technological applications.
  • Precise control over wrinkle location, wavelength, and amplitude is essential for usability.
  • Existing methods often lack the ability to independently control these parameters.

Purpose of the Study:

  • To develop a novel surface fabrication method for controlled wrinkling.
  • To achieve distinct wrinkling morphologies on a single surface.
  • To enable independent control over wrinkle wavelength and amplitude.

Main Methods:

  • Fabrication of a thin, glassy film on a topographically-patterned elastomeric substrate.
  • Creation of two distinct wrinkling regions: unsupported and supported film areas.
  • Analysis of wrinkling mechanics influenced by film properties, substrate topography, and applied strain.

Main Results:

  • Successfully generated surfaces with two distinct wrinkling morphologies.
  • Demonstrated that wrinkling wavelength and amplitude scale differently with geometry and strain.
  • Achieved independent control over wrinkling parameters in each distinct region.

Conclusions:

  • The developed method allows for precise, independent control of wrinkled pattern morphology.
  • This technique offers a versatile platform for designing surfaces with tunable wrinkling for diverse applications.
  • The findings advance the capability to engineer functional wrinkled surfaces for microscale technologies.