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Chromogenic Photonic Crystal Detectors for Monitoring Small Molecule Diffusion at Solid-Solid Interfaces Using

Sin-Yen Leo1, Calen J Leverant1, Yifan Zhang2

  • 1Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States.

ACS Applied Materials & Interfaces
|December 17, 2024
PubMed
Summary

Novel photonic crystal detectors using shape memory polymers can now detect trace amounts of small molecule diffusion at solid-solid interfaces. This breakthrough offers inexpensive, reusable sensing for biomedical, environmental, and safety applications.

Keywords:
chromogenicdetectorsphotonic crystalsshape memory polymersstimuli-responsive

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Science

Background:

  • In situ monitoring of small molecule diffusion at solid-solid interfaces presents significant challenges.
  • Existing methods often require sophisticated and costly equipment, limiting accessibility.

Purpose of the Study:

  • To develop novel chromogenic photonic crystal detectors for sensitive detection of trace small molecule diffusion.
  • To integrate bioinspired structural color with stimuli-responsive shape memory polymers (SMPs) for this purpose.

Main Methods:

  • Utilized macroporous SMP membranes with stimuli-responsive shape memory properties.
  • Employed structural color changes in photonic crystals triggered by diffused small molecules.
  • Conducted systematic experimental and theoretical investigations, including microscopy, spectroscopy, and diffusion modeling.

Main Results:

  • Demonstrated diffusion-induced shape memory and chromogenic mechanisms in the SMP detectors.
  • Successfully performed proof-of-concept sensing of bioactive ingredients (methyl salicylate, vitamin E) and phthalates.
  • Confirmed temporospatial-resolved diffusion detection capabilities.

Conclusions:

  • Developed inexpensive, reusable, and easy-to-deploy detectors for qualitative and quantitative analysis of small molecule diffusion.
  • Opened new avenues for biomedical research, threat detection, and monitoring of plastics, food, and environmental safety.
  • Showcased potential for fabricating reconfigurable photonic crystals via diffusion-enabled microcontact printing.