Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 25-32 |
| Journal | Macromolecular Chemistry And Physics |
| Volume | 214 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2013 |
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Keywords
- cellulose free-standing films
- iridescence
- liquid-crystalline polymer solutions
- nanocrystalline cellulose rods
- structural colors
Cite this
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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 journal › Article
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
M3 - Article
VL - 214
SP - 25
EP - 32
JO - Macromolecular Chemistry And Physics
JF - Macromolecular Chemistry And Physics
SN - 1022-1352
IS - 1
ER -