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Shape Memory Polymers for Active Cell Culture
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Chromogenic Photonic Crystal Sensors Enabled by Multistimuli-Responsive Shape Memory Polymers.

Sin-Yen Leo1, Wei Zhang1, Yifan Zhang2

  • 1Department of Chemical Engineering, University of Florida, Gainesville, FL, 32611, USA.

Small (Weinheim an Der Bergstrasse, Germany)
|February 1, 2018
PubMed
Summary

Novel chromogenic photonic crystal sensors utilize smart shape memory polymers (SMPs) for all-room-temperature shape memory effects. These reusable sensors offer sensitive, quantitative analysis of analytes like ethanol in various mixtures.

Keywords:
chromogenicmultistimuli-responsivephotonic crystalssensorsshape memory polymers

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Smart shape memory polymers (SMPs) offer unique responsive properties.
  • Chromogenic sensing relies on visual color changes for detection.
  • Photonic crystals provide a platform for sensitive optical measurements.

Purpose of the Study:

  • To develop novel chromogenic photonic crystal sensors based on SMPs.
  • To demonstrate all-room-temperature shape memory effects for sensing applications.
  • To enable quantitative analysis of analytes in complex mixtures.

Main Methods:

  • Fabrication of SMPs comprising polyester/polyether-based urethane acrylates and tripropylene glycol diacrylate.
  • Utilizing a "cold" programming process to create collapsed macropores.
  • Correlating stepwise pore recovery and associated color changes with analyte concentration.
  • Conducting theoretical modeling of solvent diffusion in macroporous SMPs.

Main Results:

  • Demonstrated nontraditional all-room-temperature shape memory (SM) effects in SMPs.
  • Achieved easily perceived color changes linked to analyte concentrations.
  • Showcased high sensitivity (10 ppm) and broad measurement range (10 ppm to 30 vol%) for ethanol analysis.
  • Validated sensor performance in liquid and gas phases, including consumer products.

Conclusions:

  • Developed inexpensive, reusable, and durable SMP-based chromogenic photonic crystal sensors.
  • These sensors are deployable with mobile platforms for quantitative analysis.
  • The findings provide fundamental insights into nanoscopic SM recovery mechanisms and have broad industrial applications.