Controlling the reflection wavelength of iridescent solid films of nanocrystalline cellulose.

@article{Beck2011ControllingTR,
  title={Controlling the reflection wavelength of iridescent solid films of nanocrystalline cellulose.},
  author={Stephanie Beck and J. F. Bouchard and Richard M. Berry},
  journal={Biomacromolecules},
  year={2011},
  volume={12 1},
  pages={167-72}
}
Nanocrystalline cellulose (NCC) self-assembles in suspension to form iridescent chiral nematic films upon drying that can reflect circularly polarized light at specific wavelengths. Ultrasound treatment has now been found to increase the chiral nematic pitch in suspension and red-shift the reflection wavelength of NCC films as the applied energy increases. Sonication and electrolyte addition combined allow the reflective properties of the film to be predictably tuned. The effects of sonicating… CONTINUE READING
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