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Ring-closing depolymerization-based degradable shape memory photonic crystals with programmable structural color.

Qingyu Liu1, Tong Hu1, Xianfei Cao1

  • 1State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China.

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|September 15, 2025
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Summary
This summary is machine-generated.

New degradable shape memory photonic crystals can record and erase information using solvent evaporation. These smart materials offer self-reporting degradability through controlled polymerization and depolymerization.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Shape memory materials offer dynamic functionalities.
  • Photonic crystals exhibit unique optical properties based on structure.
  • Developing degradable smart materials is crucial for sustainable technology.

Purpose of the Study:

  • To design and synthesize novel degradable shape memory photonic crystals (DSMPCs).
  • To investigate the information recording and erasing capabilities of DSMPCs.
  • To demonstrate the self-reporting degradability of the synthesized materials.

Main Methods:

  • Ring-opening polymerization (ROP) of thioctic acid (TA) to create polymer chains.
  • Fabrication of photonic crystals from poly-TA.
  • Utilizing water evaporation for information recording and ethanol evaporation for erasing.
  • Leveraging ring-closing depolymerization (RCD) for material degradation.

Main Results:

  • Successfully designed and synthesized DSMPCs via ROP of TA.
  • Demonstrated on-demand information recording through water evaporation.
  • Achieved information erasure upon ethanol evaporation.
  • Confirmed efficient degradability with structural color self-reporting via RCD of poly-TA.

Conclusions:

  • The developed DSMPCs exhibit stimuli-responsive information storage and erasure.
  • The materials demonstrate controlled degradability with visual feedback.
  • This work presents a new platform for smart, degradable photonic materials.