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Bioinspired Multiple Stimuli-Responsive Optical Microcapsules Enabled by Microfluidics.

Pengcheng Lin1, Hongbin Chen1, Ang Li1

  • 1Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.

ACS Applied Materials & Interfaces
|September 16, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed novel biomimetic optical microcapsules inspired by chameleon skin. These microcapsules exhibit multiple stimuli-responsive behaviors, enabling dynamic control for advanced optical devices.

Keywords:
chiral nematic liquid crystalsmicrofluidicsoptical microcapsulesphotoluminescencestimuli-response

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Area of Science:

  • Materials Science
  • Optics
  • Biomimetics

Background:

  • Optical microcapsules are crucial for optical units and arrays.
  • Achieving multiple stimuli-responsive characteristics in microcapsules is challenging due to physical barriers and lack of effective triggering mechanisms.

Purpose of the Study:

  • To develop novel biomimetic binary optical microcapsules with multiple stimuli-responsive characteristics.
  • To combine visible light reflection from chiral nematic liquid crystals and photoluminescence from rare-earth complexes.
  • To overcome limitations in current optical microcapsule technology.

Main Methods:

  • Microfluidic emulsification and interfacial polymerization were used to assemble the microcapsules.
  • Microfluidic chips allowed facile control over microcapsule properties (color, intensity, size) by adjusting fluid composition and flow rate.

Main Results:

  • The biomimetic binary optical microcapsules successfully integrated visible light reflection and photoluminescence.
  • Demonstrated three reversible responsive behaviors: thermotropic reflection evolution, temperature-dependent fluorescence emission, and Fredericks electro-optical response.
  • Microcapsule properties were effectively tuned via microfluidic parameters.

Conclusions:

  • The bioinspired microcapsules offer a new strategy for manufacturing intelligent optical units.
  • Enabled dynamic response in hybrid photonic devices.
  • Microfluidics provides a versatile platform for creating advanced, responsive optical materials.