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Visible-light-programmed patterning in dynamically bonded cholesteric liquid crystal elastomer.

Jiale Liu1, Shuoning Zhang2, Zichen Wang2

  • 1Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, PR China.

Nature Communications
|November 28, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed dynamic diselenide bonded cholesteric liquid crystal elastomers (CLCEs) with tunable optical properties. These materials exhibit reversible mechanochromism and programmable colorful patterning, offering potential for advanced smart materials.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Optics

Background:

  • Cholesteric liquid crystal elastomers (CLCEs) exhibit tunable optical properties responsive to external fields.
  • However, CLCEs typically revert to their original state once the external field is removed.

Purpose of the Study:

  • To introduce diselenide dynamic covalent bonds (DCBs) into CLCEs to achieve stable, tunable optical properties.
  • To explore the potential for programmable optical effects and mechanochromism in these modified CLCEs.

Main Methods:

  • Incorporation of diselenide dynamic covalent bonds (DCBs) into the CLCE polymer network.
  • Application of combined mechanical stress (tensile/compressive) and visible light irradiation for property tuning.
  • Characterization of optical properties, mechanochromism, and patterning capabilities.

Main Results:

  • The DCB-CLCEs demonstrated reversible and precise tuning of optical properties under combined force and light stimuli.
  • The materials exhibited reversible mechanochromism, with tuned optical properties being "written" and retained.
  • High-resolution, colorful patterning was achieved by controlling light exposure under varying strain states.

Conclusions:

  • The integration of DCBs into CLCEs creates materials with reprogrammable optical properties, combining CLCE anisotropy with DCB dynamic chain exchange.
  • These DCB-CLCEs show significant potential for applications in display devices, anticounterfeiting, sensors, and smart optical films.