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Angle-Independent Structurally Colored PS@TiO2 Film with Excellent Underwater Superoleophobicity in Harsh

Yu Xue1, Fen Wang1, Yi Qin1

  • 1School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials , Shaanxi University of Science and Technology , Xi'an 710021 , People's Republic of China.

Langmuir : the ACS Journal of Surfaces and Colloids
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Researchers developed colored amorphous photonic crystals (APCs) using titanium dioxide-coated nanoparticles. These novel APCs exhibit angle-independent structural color and excellent underwater superoleophobicity, offering eco-friendly alternatives for various applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Chemical pigments pose environmental risks.
  • Nontoxic white substances like TiO2 and SiO2 scatter light incoherently.
  • Structural color can be enhanced by adding small black substances to amorphous systems.

Purpose of the Study:

  • To fabricate angle-independent colored amorphous photonic crystals (APCs).
  • To utilize titanium dioxide-coated polystyrene core-shell nanoparticles (PS@TiO2 NPs).
  • To develop an eco-friendly and efficient fabrication method.

Main Methods:

  • Fabrication of PS@TiO2 NPs using a sprayed method.
  • Creation of colored amorphous photonic crystals (APCs).
  • Incorporation of carbon black (CB) to enhance structural color and superoleophobicity.

Main Results:

  • Achieved angle-independent colored amorphous photonic crystals (APCs).
  • Demonstrated excellent underwater superoleophobicity due to multiscale roughness from TiO2 NPs.
  • Enhanced film robustness using waterborne polyurethane.

Conclusions:

  • The developed PS@TiO2/CB film offers a robust, eco-friendly solution for underwater oil repellency.
  • The fabricated APCs show potential for diverse undersurface applications.
  • This method provides a healthy and time-saving approach to creating advanced photonic materials.