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Photothermal responsive slippery surfaces based on laser-structured graphene@PVDF composites.

Zhi-Zhen Jiao1, Hao Zhou1, Xing-Chen Han1

  • 1State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.

Journal of Colloid and Interface Science
|September 11, 2022
PubMed
Summary

Researchers developed a novel photothermal responsive slippery surface using laser-structured graphene and polyvinylidene difluoride (L-G@PVDF). This smart surface enables controllable droplet manipulation and offers anti-icing properties, advancing applications in microfluidics and beyond.

Keywords:
Graphene compositeLaser fabricationPhotothermal responseSlippery surface

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Photothermal responsive slippery surfaces offer potential for various applications, including biomedicine and microfluidics.
  • Developing light-switchable slippery surfaces with anisotropic droplet manipulation capabilities remains a challenge.

Purpose of the Study:

  • To demonstrate a photothermal responsive slippery surface for controllable droplet manipulation.
  • To combine high-performance photothermal materials with hierarchical microstructures for anisotropic control.

Main Methods:

  • Fabrication of laser-structured graphene and polyvinylidene difluoride composite (L-G@PVDF) films.
  • Lubrication with paraffin to create a slippery surface with self-healing and light-responsive wettability.
  • Introduction of anisotropic grooved structures for directional droplet control.

Main Results:

  • The L-G@PVDF film achieved high light absorption (∼95.4%) in visible and NIR regions.
  • The paraffin-infused surface exhibited light-responsive wettability changes and self-healing properties.
  • Anisotropic grooved structures enabled light-controlled anisotropic droplet manipulation and demonstrated anti-frosting/de-icing capabilities.

Conclusions:

  • The developed L-G@PVDF surface provides a smart platform for controllable droplet manipulation.
  • The surface's photothermal responsiveness and anisotropic features open avenues for advanced microfluidic devices and self-cleaning applications.