Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2776
Título: Structural Color and Iridescence in Transparent Sheared Cellulosic Films
Autor: Fernandes, Susete N.
Geng, Yong
Vignolini, Sílvia
Glover, Beverley J.
Trindade, Ana C.
Canejo, João P.
Almeida, Pedro Lúcio Maia Marques de
Brogueira, Pedro
Godinho, Maria Helena
Palavras-chave: Cellulose free-standing films
Liquid-crystalline polymer solutions
Nanocrystalline cellulose rods
Structural colors
Liquid-crystalline solutions
Atomic-force microscopy
Hydeoxypropycellulose films
Nanocomposite materials
Alignment layers
Data: 11-Jan-2013
Editora: Wiley-Verlag
Citação: FERNANDES, Susete N.; GENG, Yong; VIGNOLINI, Sílvia; GLOVER, Beverley J.;TRINDADE, Ana C.; CANEJO, Joao P.; ALMEIDA, Pedro L. ; BROGUEIRA, Pedro; GODINHO, Maria H. - Structural Color and Iridescence in Transparent Sheared Cellulosic Films. Macromolecular Chemistry and Physics. ISSN 1022-1352. Vol. 214, nr 1 (2013), p. 25-32.
Resumo: Shear transparent cellulose free-standing thin films can develop iridescence similar to that found in petals of the tulip Queen of the Night. The iridescence of the film arises from the modulation of the surface into bands periodically spread perpendicular to the shear direction. Small amounts of nanocrystalline cellulose (NCC) rods in the precursor liquid-crystalline solutions do not disturb the optical properties of the solutions but enhance the mechanical characteristics of the films and affects their iridescence. Smaller bands periodicity, not affected by the NCC rods, slightly deviated from the shear direction is also observed. NCCs are crucial to tune and understand the film's surface features formation. Our findings could lead to new materials for application in soft reflective screens and devices.
Peer review: yes
URI: http://hdl.handle.net/10400.21/2776
ISSN: 1022-1352
Aparece nas colecções:ISEL - Física - Artigos

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