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A Rewritable, Reprogrammable, Dual Light-Responsive Polymer Actuator.

Anne Helene Gelebart1,2, Dirk J Mulder1,3, Ghislaine Vantomme2

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Angewandte Chemie (International Ed. in English)
|August 24, 2017
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Summary
This summary is machine-generated.

Researchers developed a rewritable liquid crystal actuator using a dual-photoresponsive dye. This programmable soft actuator

Keywords:
actuatorsliquid crystalsphotothermal effectspolymerssoft matter

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Soft Robotics

Background:

  • Liquid crystal elastomers (LCEs) are advanced materials with unique responsive properties.
  • Photoresponsive actuators offer precise control over movement but often lack reconfigurability.
  • Azomerocyanine dyes provide tunable optical properties for material programming.

Purpose of the Study:

  • To fabricate a novel rewritable and reprogrammable dual-photoresponsive liquid crystalline-based actuator.
  • To demonstrate precise control over actuator folding using different wavelengths of light.
  • To enable the erasing and rewriting of patterns for reusable soft actuators.

Main Methods:

  • Fabrication of a liquid crystalline-based actuator incorporating an azomerocyanine dye.
  • Local conversion of the dye to a hydroxyazopyridinium form via acid treatment.
  • Utilizing distinct light wavelengths to trigger photoisomerization and control actuator shape.

Main Results:

  • The actuator exhibits dual-photoresponsiveness due to the azomerocyanine dye.
  • Programmable folding is achieved by selectively activating dye forms with different light colors.
  • Reversible acidic patterning allows for erasing and rewriting of actuator configurations.

Conclusions:

  • The developed actuator is rewritable and reprogrammable, offering unprecedented adjustability.
  • This technology enables the creation of versatile, reusable soft actuators with light-controlled functions.
  • The findings open new avenues for designing adaptive and reconfigurable soft robotic systems.