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Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
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Chiral self-assembled solid microspheres: a novel multifunctional microphotonic device.

Gabriella Cipparrone1, Alfredo Mazzulla, Alfredo Pane

  • 1Physics Department, University of Calabria, Rende, Italy. gabriella.cipparrone@fis.unical.it

Advanced Materials (Deerfield Beach, Fla.)
|November 16, 2011
PubMed
Summary
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Researchers created solid chiral microspheres from liquid crystal-water emulsions. These self-organizing spheres possess unique optical properties and varied internal structures based on emulsion characteristics.

Area of Science:

  • Materials Science
  • Optics
  • Soft Matter Physics

Background:

  • Cholesteric liquid crystals (CLCs) are known for their unique optical properties, including selective reflection of light.
  • Self-organization is a key principle in the formation of complex structures in nature and materials science.
  • Controlling the internal structure of microparticles is crucial for tailoring their functionalities.

Purpose of the Study:

  • To develop a method for producing solid chiral microspheres with tunable optical properties.
  • To investigate the relationship between the physicochemical properties of liquid crystal emulsions and the resulting microsphere structures.
  • To explore the potential applications of these multifunctional microspheres.

Main Methods:

  • Utilizing photopolymerization of cholesteric liquid crystal-water emulsions.

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  • Characterizing the internal helicoidal structures (radial, conical, cylindrical) of the microspheres.
  • Analyzing the influence of emulsion parameters on microsphere morphology and optical behavior.

    • Main Results:

    • Successfully synthesized solid chiral microspheres with diverse internal helicoidal configurations.
    • Demonstrated that the microsphere's internal structure is controllable by adjusting the precursor liquid crystal emulsion properties.
    • Observed unique and multifunctional optical properties arising from the controlled internal architectures.

    Conclusions:

    • Photopolymerization of CLC-water emulsions offers a versatile route to chiral microspheres.
    • The internal structure and optical properties of these microspheres can be precisely engineered.
    • These engineered chiral microspheres hold promise for advanced optical applications.