Journal article

Photonic Particles Made by the Confined Self‐Assembly of a Supramolecular Comb‐Like Block Copolymer

DOKPE

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  • 2021
Published in:
  • Macromolecular Rapid Communications. - Wiley. - 2021, vol. 42, no. 24, p. 2100522
English Approaches that enable the preparation of robust polymericphotonic particles are of interest for the development of nonfading and highlyreflective pigments for applications such as paints and display technologies.Here, the preparation of photonic particles that display structural color inboth, aqueous suspension and the dry solid state is reported. This is achievedby exploiting the confined self-assembly of a supramolecular comb-likeblock copolymer (BCP) that microphase separates into a well-ordered lamellarmorphology with dimensions that promote a photonic bandgap in the visiblerange. The comb-like BCP is formed by robust ionic interactions betweenpoly(styrene-b-4-vinyl-pyridine) (PS-b-P4VP) BCP and dodecylbenzene sulfonicacid (DBSA), which selectively interacts with P4VP blocks. The components arecombined in chloroform, and an aqueous emulsion is prepared. Evaporationof the organic solvent leads to the formation of solid microparticles with an onion-like 3D morphology. These photonic pigments display brilliantcolors with reflectance spectra featuring pronounced optical bandgaps across the entire visible wavelength range with a peak reflectivity of 80–90%.
Faculty
Faculté des sciences et de médecine
Department
AMI - Physique de la matière molle
Language
  • English
Classification
Physics
License
CC BY
Open access status
hybrid
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/319834
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