Difference between revisions of "Temperature Dependent Photonic Bandgap in a Self-Assembled Hydrogen Bonded Liquid Crystalline Diblock Copolymer"

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== Overview ==
 
== Overview ==
 +
A self-assembled hybrid material demonstrating a photonic bandgap in the visible wavelength regime can be tuned thermally or electrically. Hydrogen bonds between a host polymer and liquid-crystal-mesophase-forming  moieties guest units to form a self-assembled 1D lamellar structure with a 175nm periodicity. It provides a stop-band in the green wavelength regime.
  
  
 
== Results and Discussion ==
 
== Results and Discussion ==
 +
Hydrogen bonds induces the formation of a liquid-crystal mesophase in a block of a coil-coil diblock copoloymer host. Anionic synthetization of polysterene-block-poly(methylacrylicacid) (PS-b-MAA) bloch-copolymer self-assembles.
 
[[Image:Osuji 1.jpg|400px|thumb|left|]] [[Image:Osuji 2.jpg|400px|thumb|right|]]  [[Image:Osuji 3.jpg|400px|thumb|left|]]  [[Image:Osuji 4.jpg|400px|thumb|right|]]  [[Image:Osuji 5.jpg|400px|thumb|left|]]  [[Image:Osuji 6.jpg|400px|thumb|right|]]  [[Image:Osuji 7.jpg|400px|thumb|left|]]  [[Image:Osuji 8.jpg|400px|thumb|right|]]
 
[[Image:Osuji 1.jpg|400px|thumb|left|]] [[Image:Osuji 2.jpg|400px|thumb|right|]]  [[Image:Osuji 3.jpg|400px|thumb|left|]]  [[Image:Osuji 4.jpg|400px|thumb|right|]]  [[Image:Osuji 5.jpg|400px|thumb|left|]]  [[Image:Osuji 6.jpg|400px|thumb|right|]]  [[Image:Osuji 7.jpg|400px|thumb|left|]]  [[Image:Osuji 8.jpg|400px|thumb|right|]]

Revision as of 01:01, 18 November 2010

Birgit Hausmann

Reference

C. Osuji et. al. "Temperature Dependent Photonic Bandgap in a Self-Assembled Hydrogen Bonded Liquid Crystalline Diblock Copolymer", Adv. Funct. Mater., 753-758 (12) 2002

Keywords

Overview

A self-assembled hybrid material demonstrating a photonic bandgap in the visible wavelength regime can be tuned thermally or electrically. Hydrogen bonds between a host polymer and liquid-crystal-mesophase-forming moieties guest units to form a self-assembled 1D lamellar structure with a 175nm periodicity. It provides a stop-band in the green wavelength regime.


Results and Discussion

Hydrogen bonds induces the formation of a liquid-crystal mesophase in a block of a coil-coil diblock copoloymer host. Anionic synthetization of polysterene-block-poly(methylacrylicacid) (PS-b-MAA) bloch-copolymer self-assembles.

Osuji 1.jpg
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Osuji 4.jpg
Osuji 5.jpg
Osuji 6.jpg
Osuji 7.jpg
Osuji 8.jpg