Structural Color and Iridescence in Transparent Sheared Cellulosic Films

Susete Nogueira Fernandes, Yong Geng, Silvia Vignolini, Beverley J. Glover, Ana C. Trindade, João Paulo Heitor Godinho Canejo, Pedro L. Almeida, Pedro Brogueira, Maria Helena Figueiredo Godinho

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

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 char- acteristics of the films and affects their iridescence. Smaller bands periodicity, not affected by the NCC rods, slightly devi- ated 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.
Original languageEnglish
Pages (from-to)25-32
JournalMacromolecular Chemistry And Physics
Volume214
Issue number1
DOIs
Publication statusPublished - 2013

Fingerprint

iridescence
cellulose
Cellulose
shear
Color
color
rods
petals
night
periodic variations
Optical properties
Modulation
Crystalline materials
modulation
optical properties
Thin films
Liquids
liquids
thin films
Direction compound

Keywords

  • cellulose free-standing films
  • iridescence
  • liquid-crystalline polymer solutions
  • nanocrystalline cellulose rods
  • structural colors

Cite this

Fernandes, Susete Nogueira ; Geng, Yong ; Vignolini, Silvia ; Glover, Beverley J. ; Trindade, Ana C. ; Canejo, João Paulo Heitor Godinho ; Almeida, Pedro L. ; Brogueira, Pedro ; Godinho, Maria Helena Figueiredo. / Structural Color and Iridescence in Transparent Sheared Cellulosic Films. In: Macromolecular Chemistry And Physics. 2013 ; Vol. 214, No. 1. pp. 25-32.
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title = "Structural Color and Iridescence in Transparent Sheared Cellulosic Films",
abstract = "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 char- acteristics of the films and affects their iridescence. Smaller bands periodicity, not affected by the NCC rods, slightly devi- ated 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.",
keywords = "cellulose free-standing films, iridescence, nanocrystalline cellulose rods, structural colors, liquid-crystalline polymer solutions, cellulose free-standing films, iridescence , liquid-crystalline polymer solutions , nanocrystalline cellulose rods , structural colors",
author = "Fernandes, {Susete Nogueira} and Yong Geng and Silvia Vignolini and Glover, {Beverley J.} and Trindade, {Ana C.} and Canejo, {Jo{\~a}o Paulo Heitor Godinho} and Almeida, {Pedro L.} and Pedro Brogueira and Godinho, {Maria Helena Figueiredo}",
note = "Sem pdf conforme despacho. This research was supported by the Portuguese Science and Technology Foundation (FCT) through contracts PTDC/CTM/099595/2008/2009, PTDC/CTM/101776/2008, PTDC/FIS/110132/2009, and PEst-C/CTM/LA0025/2011 (Strategic Project - LA 25 - 2011-2012). S.N.F., Y.G., and A. C. T. acknowledge FCT for grants SFRH/BPD/78430/2011, SFRH/BD/63574/2009 and SFRH/BDP/65133/2009, respectively. We thank Professor D. G. Gray and Dr. E. Kloser for the kindly supply of nanocrystalline cellulose rods and E. Moyroud and U. Steiner for useful discussion.",
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Structural Color and Iridescence in Transparent Sheared Cellulosic Films. / Fernandes, Susete Nogueira; Geng, Yong; Vignolini, Silvia; Glover, Beverley J.; Trindade, Ana C.; Canejo, João Paulo Heitor Godinho; Almeida, Pedro L.; Brogueira, Pedro; Godinho, Maria Helena Figueiredo.

In: Macromolecular Chemistry And Physics, Vol. 214, No. 1, 2013, p. 25-32.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Structural Color and Iridescence in Transparent Sheared Cellulosic Films

AU - Fernandes, Susete Nogueira

AU - Geng, Yong

AU - Vignolini, Silvia

AU - Glover, Beverley J.

AU - Trindade, Ana C.

AU - Canejo, João Paulo Heitor Godinho

AU - Almeida, Pedro L.

AU - Brogueira, Pedro

AU - Godinho, Maria Helena Figueiredo

N1 - Sem pdf conforme despacho. This research was supported by the Portuguese Science and Technology Foundation (FCT) through contracts PTDC/CTM/099595/2008/2009, PTDC/CTM/101776/2008, PTDC/FIS/110132/2009, and PEst-C/CTM/LA0025/2011 (Strategic Project - LA 25 - 2011-2012). S.N.F., Y.G., and A. C. T. acknowledge FCT for grants SFRH/BPD/78430/2011, SFRH/BD/63574/2009 and SFRH/BDP/65133/2009, respectively. We thank Professor D. G. Gray and Dr. E. Kloser for the kindly supply of nanocrystalline cellulose rods and E. Moyroud and U. Steiner for useful discussion.

PY - 2013

Y1 - 2013

N2 - 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 char- acteristics of the films and affects their iridescence. Smaller bands periodicity, not affected by the NCC rods, slightly devi- ated 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.

AB - 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 char- acteristics of the films and affects their iridescence. Smaller bands periodicity, not affected by the NCC rods, slightly devi- ated 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.

KW - cellulose free-standing films

KW - iridescence

KW - nanocrystalline cellulose rods

KW - structural colors

KW - liquid-crystalline polymer solutions

KW - cellulose free-standing films

KW - iridescence

KW - liquid-crystalline polymer solutions

KW - nanocrystalline cellulose rods

KW - structural colors

U2 - 10.1002/macp.201200351

DO - 10.1002/macp.201200351

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EP - 32

JO - Macromolecular Chemistry And Physics

JF - Macromolecular Chemistry And Physics

SN - 1022-1352

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