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Electrophysiological Methods for Measuring Photopigment Levels in Drosophila Photoreceptors
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Hierarchically Structured Deformation-Sensing Mechanochromic Pigments.

Jess M Clough1, Cédric Kilchoer1, Bodo D Wilts1,2

  • 1Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|March 19, 2023
PubMed
Summary
This summary is machine-generated.

New mechanochromic pigments combine photonic structures and covalent mechanophores to overcome limitations in strain sensing. These hierarchically structured materials offer a broad, tunable detection range for mechanical force in polymers.

Keywords:
mechanochemistryphotonicspigmentspolymerssensing

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Mechanochromic materials change color with mechanical force, valuable for research and applications.
  • Existing polymers face limitations in sensing range, quantitative data, and implementation simplicity.

Purpose of the Study:

  • To develop novel mechanochromic pigments overcoming limitations of current materials.
  • To create pigments with broad strain detection and quantitative capabilities.

Main Methods:

  • Synthesized microspheres combining elastic polymers with spiropyran cross-links and silica nanoparticles.
  • Integrated photonic structures sensitive to deformation with covalent mechanophores responding to bond scission.

Main Results:

  • Detected strain below 1% via photonic structure reflection shifts.
  • Observed mechanophore conversion (spiropyran to merocyanine) between 30%–70% strain, indicating a wide detection range.
  • Demonstrated tunable and synergistic responses, allowing control over activation strain.

Conclusions:

  • Hierarchically structured mechanochromic pigments offer a broad, tunable strain detection range.
  • These pigments are easily incorporated into polymers for quantitative, spatially heterogeneous deformation probing.