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Surface Modification of Nanocrystalline Cellulose toward a TunableOptical Polarizer

Published online by Cambridge University Press:  28 December 2015

Martin Bolduc*
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
Michel Poirier
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
Gregory Chauve
Affiliation:
FPInnovation, 570, Blvd Saint-Jean, Pointe-Claire, QC, H9R 3J9 Canada
Hassane Oulachgar
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
Tom Tiwald
Affiliation:
J.A. Woollam Co., Inc., 645 M Street, Lincoln, NE, 68508 USA
Pierre Laperle
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
David Gay
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
Patrick Beaupre
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
Myriam Methot
Affiliation:
FPInnovation, 570, Blvd Saint-Jean, Pointe-Claire, QC, H9R 3J9 Canada
Melanie Leclerc
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
Sebastien Deshaies
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
Martin Briand
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
Jean Bouchard
Affiliation:
FPInnovation, 570, Blvd Saint-Jean, Pointe-Claire, QC, H9R 3J9 Canada
Pierre Galarneau
Affiliation:
INO - Institut National d'Optique, 2740 Einstein, Québec City, QC, G1P 4S4 Canada
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Abstract

Nanocrystalline cellulose (NCC) solid films obtained from evaporated aqueousheterogeneous mixtures retain the self-assembled chiral nematic order formed inthe suspension. These semi-translucent films are iridescent and reflect ortransmit circularly polarized visible light (400-700nm) due to the chiralproperties of the self-assembled nanostructure. This effect occurs at differentwavelengths depending on the pitch of the helical structure. In this paper, NCCfilms have been fabricated from different recipes to produce various helixpitches. The corresponding red-shift in the optical wavelength has been obtainedby means of Spectrophotometry measurements. Preliminary experiments have beenperformed to investigate optical polarization effects as function of angles ofincidence using ellipsometry. Finally, laser micromachining results on NCC filmsmay suggest feasibility for integration as tunable light polarizercomponents.

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Copyright
Copyright © Materials Research Society 2015 

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References

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