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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

Published on: February 27, 2019

Structural colored gels for tunable soft photonic crystals.

Mohammad Harun-Ur-Rashid¹, Takahiro Seki, Yukikazu Takeoka

¹Department of Molecular Design and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.

Chemical Record (New York, N.Y.)

|March 24, 2009

Summary

Chemically engineered porous gels exhibit tunable structural colors due to ordered structures and Bragg diffraction. These smart soft materials, fabricated using colloidal crystal templates, offer responsive photonic properties.

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Last Updated: Jun 24, 2026

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Published on: September 26, 2014

Area of Science:

Materials Science
Polymer Chemistry
Optics

Background:

Ordered porous structures in chemical gels can be templated by colloidal crystals.
These structures exhibit structural color via Bragg diffraction, enabling tunable photonic properties.
N-isopropylacrylamide (NIPA) is a key thermosensitive monomer for fabricating such gels.

Purpose of the Study:

To review the synthesis of colloidal crystal templates for porous gels.
To discuss the fabrication of structural colored porous gels.
To highlight the applications of these smart soft materials as tunable photonic crystals.

Main Methods:

Utilizing closest-packed colloidal crystals as templates for creating ordered porous structures.
Employing N-isopropylacrylamide (NIPA) and other monomers to synthesize structural colored gels.
Investigating techniques for regulating structural colors in porous gels.

Main Results:

Periodically ordered interconnecting porous structures were successfully embodied in chemical gels.
The porous gels displayed structural color due to coherent Bragg optical diffraction.
Tunable structural colors were achieved by regulating gel properties.

Conclusions:

Porous gels with ordered structures offer responsive and tunable photonic properties.
These materials function as smart soft materials with potential applications in tunable photonic crystals.
The synthesis and application of structural colored porous gels represent a significant advancement in materials science.