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Finely tunable dynamical coloration using bicontinuous micrometer-domains.

Yuyin Xi1,2, Fan Zhang3, Yuanchi Ma4

  • 1Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA.

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Researchers developed a novel photonic colloidal gel for tunable structural color. This ordered-free material precisely controls light transmission and color beyond the visible spectrum, offering scalable and reversible dynamic coloration.

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Area of Science:

  • Materials Science
  • Optics
  • Nanotechnology

Background:

  • Structural color in nature (e.g., Morpho butterfly wings) and photonic crystals relies on periodic nanostructures and light interference.
  • Traditional structure-colored materials use ordered periodic structures to manipulate light properties.
  • A need exists for novel materials offering precise control over structural color and light transmission without long-range order.

Purpose of the Study:

  • To introduce a novel photonic colloidal gel for precise control of structural color and light transmission.
  • To demonstrate an alternative approach to structural coloration that does not rely on long-range order.
  • To explore the dynamic and tunable optical properties of this new material.

Main Methods:

  • Fabrication of a photonic colloidal gel using microphase separation of binary solvents.
  • Formation of micrometer-sized bicontinuous domains of nanoparticles within the gel.
  • Characterization of structural color and light transmission properties, including wavelength selectivity and tunability.

Main Results:

  • The novel photonic colloidal gel exhibits precise control over structural color and light transmission without long-range order.
  • Dynamic coloration with high wavelength selectivity was achieved over a broad spectral range, extending beyond visible light.
  • The material demonstrated thermally tunable and reversible optical properties.
  • The fabrication process was found to be easily scalable.

Conclusions:

  • This work presents a new paradigm for creating structural color using disordered photonic colloidal gels.
  • The developed material offers dynamic, tunable, and scalable structural coloration with precise wavelength selectivity.
  • This approach overcomes limitations of traditional periodic structure-based methods and opens new avenues for advanced optical materials.