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Related Experiment Video

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Electrospun Nanofiber Scaffolds with Gradations in Fiber Organization
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Multiblock Bottlebrush Nanofibers from Organic Electronic Materials.

Christopher M Tonge1, Ethan R Sauvé1, Susan Cheng1

  • 1Department of Chemistry , The University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada.

Journal of the American Chemical Society
|September 6, 2018
PubMed
Summary

Researchers created unique fiber-like nanomaterials mimicking organic electronic device structures on single polymer chains. This breakthrough enables the miniaturization of advanced materials for organic electronics applications.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Organic Electronics

Background:

  • Organic electronic devices rely on multilayered structures for function.
  • Synthesizing complex, ordered nanostructures on a molecular level is challenging.

Purpose of the Study:

  • To develop a method for creating fiber-like nanomaterials with multilayered structures on individual polymer chains.
  • To mimic the architecture of organic electronic devices at the macromolecular level.

Main Methods:

  • Utilized a combination of copper-catalyzed reversible-deactivation radical polymerization (RDRP) and ring-opening metathesis polymerization (ROMP).
  • Synthesized multiblock bottlebrush copolymers from ordered sequences of organic semiconductors.
  • Prepared narrowly dispersed fibers from common organic electronic materials (hole transport, electron transport, host).

Main Results:

  • Achieved high molecular weights (> 2 × 10^6 Da) with low dispersities (as low as 1.12).
  • Synthesized diblock nanofibers forming p-n junctions with reversible electrochemistry.
  • Constructed phosphorescent organic light-emitting diode (OLED) structured nanofibers on single macromolecules.

Conclusions:

  • The developed strategy allows for the creation of arbitrary organic semiconductor-based nanofibers without requiring crystallinity or supramolecular interactions.
  • This provides a powerful method for the miniaturization of materials for advanced organic electronic devices.
  • Independent observation of photophysical properties for each component within the constructed nanofibers is possible.