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Related Concept Videos

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...

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Related Experiment Video

Updated: Jul 9, 2026

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
10:35

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

Robust polymer colloidal crystal photonic bandgap structures.

S H Foulger, S Kotha, B Sweryda-Krawiec

    Optics Letters
    |December 11, 2007
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed mechanically stable photonic bandgap structures using organic colloidal crystalline arrays (CCA) embedded in new polymeric matrices. These robust organic photonic crystals show technological promise for advanced optical applications.

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    Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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    Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

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    Area of Science:

    • Materials Science
    • Optics
    • Polymer Chemistry

    Background:

    • Colloidal crystalline arrays (CCA) are key components in photonic materials.
    • Developing mechanically stable and optically functional CCA-based structures remains a challenge.

    Purpose of the Study:

    • To create novel polymeric matrices for embedding organic CCAs.
    • To achieve mechanically stable photonic bandgap structures with CCAs.
    • To explore the optical properties of these new composite materials.

    Main Methods:

    • Dispersing polystyrene CCAs in high molecular weight poly(ethylene glycol) (PEG).
    • In situ polymerization of hydrophilic monomers (acrylamide and PEG variants) around CCAs.
    • Characterizing the mechanical stability and optical properties (opalescence, photonic bandgaps) of the resulting composites.

    Main Results:

    • CCA-dispersed PEG matrices showed strong red opalescence (peak at 614 nm) and mechanical robustness.
    • Free-standing CCA composites with cross-linked poly(N, N-dimethylacrylamide) matrices exhibited visible photonic bandgaps.
    • The developed matrices successfully integrated CCAs into stable photonic structures.

    Conclusions:

    • New polymeric matrices enable the creation of robust organic photonic crystals.
    • These materials demonstrate significant potential for technological applications in photonics.
    • The methods provide a pathway for fabricating stable, functional organic photonic devices.