(Photo-) thermally induced formation of dynamic surface topographies in polymer hydrogel networks

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Abstract

In this Article, we report on our approaches to creating responsive hydrogel coatings with surfaces that can be switched between a close to flat state and a state with a predesigned topographic pattern. The trigger is either temperature or, indirectly, light. The hydrogel coatings are based on the known thermal responsive poly(N-isopropylacrylamide) utilizing its solubility change at its lower critical solution temperature (LCST) at around 32 °C. Using this material in combination with controlled cross-linking, we developed three fabrication strategies. Thermally switching symmetric surface topographies were created by careful and spatial control of the cross-link density. Sensitivity to light was created by patterns of tin oxide converting absorbed light into local heat. And to broaden the application range, we introduced a method based on volumetric effects created by a corrugated substrate. The latter method allows for the formation of asymmetric or slanted surface structures.
LanguageEnglish
Pages5622-5629
JournalLangmuir
Volume29
Issue number18
DOIs
StatePublished - 2013

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Hydrogel
Surface topography
Hydrogels
topography
Polymers
polymers
coatings
Coatings
Tin oxides
Surface structure
tin oxides
Telecommunication links
solubility
Solubility
actuators
Fabrication
heat
Temperature
fabrication
temperature

Cite this

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title = "(Photo-) thermally induced formation of dynamic surface topographies in polymer hydrogel networks",
abstract = "In this Article, we report on our approaches to creating responsive hydrogel coatings with surfaces that can be switched between a close to flat state and a state with a predesigned topographic pattern. The trigger is either temperature or, indirectly, light. The hydrogel coatings are based on the known thermal responsive poly(N-isopropylacrylamide) utilizing its solubility change at its lower critical solution temperature (LCST) at around 32 °C. Using this material in combination with controlled cross-linking, we developed three fabrication strategies. Thermally switching symmetric surface topographies were created by careful and spatial control of the cross-link density. Sensitivity to light was created by patterns of tin oxide converting absorbed light into local heat. And to broaden the application range, we introduced a method based on volumetric effects created by a corrugated substrate. The latter method allows for the formation of asymmetric or slanted surface structures.",
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(Photo-) thermally induced formation of dynamic surface topographies in polymer hydrogel networks. / Liu, D.; Bastiaansen, C.W.M.; Toonder, den, J.M.J.; Broer, D.J.

In: Langmuir, Vol. 29, No. 18, 2013, p. 5622-5629.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - (Photo-) thermally induced formation of dynamic surface topographies in polymer hydrogel networks

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