Printable optical sensors based on H-bonded supramolecular cholesteric liquid crystal networks

N. Herzer, H Guneysu, D.J.D. Davies, D. Yildirim, A.R. Vaccaro, D.J. Broer, C.W.M. Bastiaansen, A.P.H.J. Schenning

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Abstract

A printable H-bonded cholesteric liquid crystal (CLC) polymer film has been fabricated that, after conversion to a hygroscopic polymer salt film, responds to temperature and humidity by changing its reflection color. Fast-responding humidity sensors have been made in which the reflection color changes between green and yellow depending on the relative humidity. The change in reflection band is a result of a change in helix pitch in the film due to absorption and desorption of water, resulting in swelling/deswelling of the film material. When the polymer salt was saturated with water, a red-reflecting film was obtained that can potentially act as a time/temperature integrator. Finally, the films were printed on a foil, showing the potential application of supramolecular CLC materials as low-cost, printable, battery-free optical sensors.
Original languageEnglish
Pages (from-to)7608-7611
Number of pages4
JournalJournal of the American Chemical Society
Volume134
Issue number18
DOIs
Publication statusPublished - 2012

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Cholesteric liquid crystals
Liquid Crystals
Optical sensors
Humidity
Polymers
Color
Salts
Temperature
Water
Atmospheric humidity
Humidity sensors
Liquid crystal polymers
Costs and Cost Analysis
Polymer films
Metal foil
Swelling
Desorption
Costs

Cite this

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title = "Printable optical sensors based on H-bonded supramolecular cholesteric liquid crystal networks",
abstract = "A printable H-bonded cholesteric liquid crystal (CLC) polymer film has been fabricated that, after conversion to a hygroscopic polymer salt film, responds to temperature and humidity by changing its reflection color. Fast-responding humidity sensors have been made in which the reflection color changes between green and yellow depending on the relative humidity. The change in reflection band is a result of a change in helix pitch in the film due to absorption and desorption of water, resulting in swelling/deswelling of the film material. When the polymer salt was saturated with water, a red-reflecting film was obtained that can potentially act as a time/temperature integrator. Finally, the films were printed on a foil, showing the potential application of supramolecular CLC materials as low-cost, printable, battery-free optical sensors.",
author = "N. Herzer and H Guneysu and D.J.D. Davies and D. Yildirim and A.R. Vaccaro and D.J. Broer and C.W.M. Bastiaansen and A.P.H.J. Schenning",
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journal = "Journal of the American Chemical Society",
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Printable optical sensors based on H-bonded supramolecular cholesteric liquid crystal networks. / Herzer, N.; Guneysu, H; Davies, D.J.D.; Yildirim, D.; Vaccaro, A.R.; Broer, D.J.; Bastiaansen, C.W.M.; Schenning, A.P.H.J.

In: Journal of the American Chemical Society, Vol. 134, No. 18, 2012, p. 7608-7611.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Printable optical sensors based on H-bonded supramolecular cholesteric liquid crystal networks

AU - Herzer, N.

AU - Guneysu, H

AU - Davies, D.J.D.

AU - Yildirim, D.

AU - Vaccaro, A.R.

AU - Broer, D.J.

AU - Bastiaansen, C.W.M.

AU - Schenning, A.P.H.J.

PY - 2012

Y1 - 2012

N2 - A printable H-bonded cholesteric liquid crystal (CLC) polymer film has been fabricated that, after conversion to a hygroscopic polymer salt film, responds to temperature and humidity by changing its reflection color. Fast-responding humidity sensors have been made in which the reflection color changes between green and yellow depending on the relative humidity. The change in reflection band is a result of a change in helix pitch in the film due to absorption and desorption of water, resulting in swelling/deswelling of the film material. When the polymer salt was saturated with water, a red-reflecting film was obtained that can potentially act as a time/temperature integrator. Finally, the films were printed on a foil, showing the potential application of supramolecular CLC materials as low-cost, printable, battery-free optical sensors.

AB - A printable H-bonded cholesteric liquid crystal (CLC) polymer film has been fabricated that, after conversion to a hygroscopic polymer salt film, responds to temperature and humidity by changing its reflection color. Fast-responding humidity sensors have been made in which the reflection color changes between green and yellow depending on the relative humidity. The change in reflection band is a result of a change in helix pitch in the film due to absorption and desorption of water, resulting in swelling/deswelling of the film material. When the polymer salt was saturated with water, a red-reflecting film was obtained that can potentially act as a time/temperature integrator. Finally, the films were printed on a foil, showing the potential application of supramolecular CLC materials as low-cost, printable, battery-free optical sensors.

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JO - Journal of the American Chemical Society

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