Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatings
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Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatings. / Stumpel, Jelle E.; Broer, Dirk J.; Bastiaansen, Cees W M; Schenning, Albert P H J.
Proceedings of SPIE: Organic Photonics VI. Vuosikerta 9137 SPIE, 2014. 91370U (Proceedings of SPIE: the International Society for Optical Engineering).Tutkimustuotos › › vertaisarvioitu
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TY - GEN
T1 - Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatings
AU - Stumpel, Jelle E.
AU - Broer, Dirk J.
AU - Bastiaansen, Cees W M
AU - Schenning, Albert P H J
N1 - EXT="Stumpel, Jelle"
PY - 2014
Y1 - 2014
N2 - In this work, we present patterned water-responsive coatings, which alter both their topological and optical properties. The polymer coatings are based on a hydrogen-bonded cholesteric liquid crystalline polymer network. A two-step photopolymerization procedure leads to a patterned coating with repeating liquid crystalline and isotropic areas. The cholesteric liquid crystalline areas reflect green light, whilst the isotropic areas are transparent for visible light. Treatment with alkaline solution results in a hygroscopic polymer salt coating. When placed in demineralized water, the polymer films swells, leading to an enhancement of the surface topography structure in which the liquid crystalline areas swell more. Moreover, the pitch of the helical organization in the cholesteric areas increases due to this swelling leading to a color change from green to red.
AB - In this work, we present patterned water-responsive coatings, which alter both their topological and optical properties. The polymer coatings are based on a hydrogen-bonded cholesteric liquid crystalline polymer network. A two-step photopolymerization procedure leads to a patterned coating with repeating liquid crystalline and isotropic areas. The cholesteric liquid crystalline areas reflect green light, whilst the isotropic areas are transparent for visible light. Treatment with alkaline solution results in a hygroscopic polymer salt coating. When placed in demineralized water, the polymer films swells, leading to an enhancement of the surface topography structure in which the liquid crystalline areas swell more. Moreover, the pitch of the helical organization in the cholesteric areas increases due to this swelling leading to a color change from green to red.
KW - cholesteric liquid crystals
KW - patterned surfaces
KW - responsive optical coatings
KW - responsive surface topographies
KW - water-responsive
UR - http://www.scopus.com/inward/record.url?scp=84902324488&partnerID=8YFLogxK
U2 - 10.1117/12.2052678
DO - 10.1117/12.2052678
M3 - Conference contribution
SN - 9781628410853
VL - 9137
T3 - Proceedings of SPIE: the International Society for Optical Engineering
BT - Proceedings of SPIE
PB - SPIE
ER -