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Linear Birefringent Films of Cellulose Nanocrystals Produced by Dip-Coating
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering. Cinvestav Queretaro, Mexico.
Cinvestav Queretaro, Mexico.
Cinvestav Queretaro, Mexico.
Cinvestav Queretaro, Mexico.
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2019 (English)In: NANOMATERIALS, ISSN 2079-4991, Vol. 9, no 1, article id 45Article in journal (Refereed) Published
Abstract [en]

Transparent films of cellulose nanocrystals (CNC) are prepared by dip-coating on glass substrates from aqueous suspensions of hydrolyzed filter paper. Dragging forces acting during films deposition promote a preferential alignment of the rod-shaped CNC. Films that are 2.8 and 6.0 mu m in thickness show retardance effects, as evidenced by placing them between a linearly polarized light source and a linear polarizer sheet in the extinction configuration. Transmission Mueller matrix spectroscopic ellipsometry measurements at normal incidence as a function of sample rotation were used to characterize polarization properties. A differential decomposition of the Mueller matrix reveals linear birefringence as the unique polarization parameter. These results show a promising way for obtaining CNC birefringent films by a simple and controllable method.

Place, publisher, year, edition, pages
MDPI , 2019. Vol. 9, no 1, article id 45
Keywords [en]
nanostructured films; birefringence; nanocrystalline cellulose; Mueller matrix
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-155615DOI: 10.3390/nano9010045ISI: 000459737200045PubMedID: 30602653OAI: oai:DiVA.org:liu-155615DiVA, id: diva2:1297796
Note

Funding Agencies|Concayt-Mexico [454210, 463797]; Conacyt [2018-000007-01EXTV-00169]; Swedish Government Strategic Research Area in Materials Science on Advanced Functional Materials at Linkoping University [2009-000971]; LIDTRA (Conacyt) [N-295261, LN-254119]; Knut and Alice Wallenberg foundation; Swedish Research Council; Carl Tryggers foundation

Available from: 2019-03-21 Created: 2019-03-21 Last updated: 2019-09-11

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Mendoza, ArturoJärrendahl, KennethArwin, Hans
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