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Near-infrared light-responsive dynamic wrinkle patterns.

Fudong Li1, Honghao Hou1, Jie Yin1

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Researchers developed near-infrared (NIR) light-responsive dynamic wrinkles using carbon nanotube (CNT)-infused elastomers. These smart surfaces reversibly switch between wrinkled and flat states, enabling applications in displays and electronics.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Science

Background:

  • Smart surfaces with tunable properties are crucial for advanced applications.
  • Dynamic micro/nanopatterning offers on-demand control over surface characteristics.

Purpose of the Study:

  • To develop a simple and versatile strategy for fabricating near-infrared (NIR) light-responsive dynamic wrinkles.
  • To demonstrate the NIR-controlled reversible switching of surface topological structures.

Main Methods:

  • Fabrication of bilayer systems using a carbon nanotube (CNT)-containing poly(dimethylsiloxane) (PDMS) elastomer as the substrate.
  • Utilizing NIR light to induce thermal expansion of the CNT-PDMS substrate, controlling strain in the bilayer.
  • Achieving reversible switching between wrinkled and wrinkle-free states via NIR irradiation on/off cycles.

Main Results:

  • Successfully created NIR-responsive dynamic wrinkles with switchable surface topology.
  • Demonstrated reversible pattern transformation within seconds upon NIR irradiation.
  • Confirmed the role of CNTs in NIR-to-thermal energy conversion for controlled surface strain.

Conclusions:

  • The developed strategy offers a facile method for creating smart surfaces with dynamic, NIR-controlled wrinkling.
  • The reversible nature of the patterns opens possibilities for tunable surface functionalities.
  • Proof-of-concept applications in smart displays, dynamic gratings, and light control electronics were successfully demonstrated.