Invited Article: Chiral optics of helicoidal cellulose nanocrystal films | Zendy

Bodo D. Wilts | Zendy; Ahu Gümrah Dumanlı | Zendy; Rox Middleton | Zendy; Pete Vukusic | Zendy; Silvia Vignolini | Zendy

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Invited Article: Chiral optics of helicoidal cellulose nanocrystal films

Author(s) -

Bodo D. Wilts,

Ahu Gümrah Dumanlı,

Rox Middleton,

Pete Vukusic,

Silvia Vignolini

Publication year - 2017

Publication title -

apl photonics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.094

H-Index - 34

ISSN - 2378-0967

DOI - 10.1063/1.4978387

Subject(s) - nanocrystal , liquid crystal , materials science , optics , lyotropic , cellulose , phase (matter) , scanning electron microscope , optical microscope , lyotropic liquid crystal , nanotechnology , optoelectronics , chemical engineering , liquid crystalline , chemistry , composite material , physics , organic chemistry , engineering

Cellulose nanocrystals in water suspensions behave as lyotropic liquid crystals forming achiral nematicphase above a critical concentration. Such an organization can be retained in solid filmsand give rise to an intense colored appearance. Here, we characterize their opticalresponse by applying optical and scanning electron microscopy, imaging scatterometry, andangle-resolved reflectance measurements. We show that the experimental results are wellexplained by computational modeling using the finite-difference time-domain method, but slightly lesswell by Berremann’s analytical model

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