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Shape Memory Polymers for Active Cell Culture
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Reconfigurable Photonic Crystals Enabled by Multistimuli-Responsive Shape Memory Polymers Possessing Room Temperature

Yin Fang, Sin-Yen Leo, Yongliang Ni

  • 1ITIA-CNR, Industrial Technologies and Automation Institute, National Council of Research , Via Bassini, 15, 20133 Milano, Italy.

ACS Applied Materials & Interfaces
|January 24, 2017
PubMed
Summary

Researchers developed reconfigurable photonic crystals using shape memory polymers (SMPs) that operate at room temperature. These materials enable "cold" programming and rapid, multi-stimuli triggered shape recovery, offering new possibilities for nano-optics.

Keywords:
chromogeniccold programmingmultistimuli-responsivephotonic crystalsshape memory polymers

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Traditional shape memory polymers (SMPs) require heat for programming and recovery, limiting their use in nano-optics.
  • Macroporous photonic crystals offer unique optical properties but often lack dynamic reconfigurability.

Purpose of the Study:

  • To demonstrate reconfigurable/rewritable macroporous photonic crystals using a novel shape memory copolymer.
  • To enable all-room-temperature shape memory cycles for photonic crystal applications.
  • To develop a noninvasive optical methodology for characterizing shape memory effects.

Main Methods:

  • Integration of a polyurethane-based shape memory copolymer with templating nanofabrication.
  • Mechanical deformation of macroporous SMP membranes for "cold" programming via order-disorder transitions.
  • Stimuli-triggered recovery (vapors, solvents, heat, microwave radiation) and optical characterization of chromogenic effects.

Main Results:

  • Demonstration of reconfigurable/rewritable macroporous photonic crystals operating at room temperature.
  • Achieved "cold" programming through mechanical deformation and rapid, multi-stimuli triggered shape recovery.
  • Established a sensitive optical methodology to quantify nanoscopic shape memory effects and critical performance parameters.

Conclusions:

  • The developed shape memory polymer photonic crystals offer unprecedented all-room-temperature reconfigurability.
  • The novel optical characterization method provides quantitative insights into shape memory mechanisms.
  • These findings open new avenues for advanced optical materials and devices in nano-optics.