Compliance-mediated topographic oscillation of polarized light triggered liquid crystal coating

Matthew Hendrikx, Burcu Sırma, Albertus P.H.J. Schenning, Danqing Liu, Dirk J. Broer

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

The ability to induce oscillating surface topographies in light-responsive liquid crystal networks on-demand by light is interesting for applications in soft robotics, self-cleaning surfaces, and haptics. However, the common height of these surface features is in the range of tens of nanometer, which limits their applications. Here a photoresponsive liquid crystal network coating with a patterned director motive exhibiting surface features that oscillate dynamically when addressed by light with modulated polarization is reported. By utilizing a compliant intermediate layer, the surface topographies increase with a factor 10, from roughly 70–100 nm to 1 µm. This increase in topography height is accompanied by a superimposed dynamic oscillation with an amplitude of ≈100 nm. These values can be translated to a 16.7% average static strain with 3.3% oscillations with respect to the coating thickness. Moreover, utilizing the complying support increases the maximum rotation speeds with an in-phase response from 2.5 up to 25° s−1. However, at this maximized rotation speed the oscillation amplitude decreases to about half of the initial value.

LanguageEnglish
Article number1800810
Number of pages6
JournalAdvanced Materials Interfaces
Volume5
Issue number20
DOIs
StatePublished - 21 Aug 2018

Fingerprint

Light polarization
Liquid crystals
Surface topography
Coatings
Surface cleaning
Topography
Robotics
Polarization
Compliance

Keywords

  • adaptive surfaces
  • compliance-mediated
  • light-responsive coatings
  • liquid crystal composite
  • oscillating topographies

Cite this

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title = "Compliance-mediated topographic oscillation of polarized light triggered liquid crystal coating",
abstract = "The ability to induce oscillating surface topographies in light-responsive liquid crystal networks on-demand by light is interesting for applications in soft robotics, self-cleaning surfaces, and haptics. However, the common height of these surface features is in the range of tens of nanometer, which limits their applications. Here a photoresponsive liquid crystal network coating with a patterned director motive exhibiting surface features that oscillate dynamically when addressed by light with modulated polarization is reported. By utilizing a compliant intermediate layer, the surface topographies increase with a factor 10, from roughly 70–100 nm to 1 µm. This increase in topography height is accompanied by a superimposed dynamic oscillation with an amplitude of ≈100 nm. These values can be translated to a 16.7{\%} average static strain with 3.3{\%} oscillations with respect to the coating thickness. Moreover, utilizing the complying support increases the maximum rotation speeds with an in-phase response from 2.5 up to 25° s−1. However, at this maximized rotation speed the oscillation amplitude decreases to about half of the initial value.",
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Compliance-mediated topographic oscillation of polarized light triggered liquid crystal coating. / Hendrikx, Matthew; Sırma, Burcu; Schenning, Albertus P.H.J.; Liu, Danqing; Broer, Dirk J.

In: Advanced Materials Interfaces, Vol. 5, No. 20, 1800810, 21.08.2018.

Research output: Contribution to journalArticleAcademicpeer-review

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AB - The ability to induce oscillating surface topographies in light-responsive liquid crystal networks on-demand by light is interesting for applications in soft robotics, self-cleaning surfaces, and haptics. However, the common height of these surface features is in the range of tens of nanometer, which limits their applications. Here a photoresponsive liquid crystal network coating with a patterned director motive exhibiting surface features that oscillate dynamically when addressed by light with modulated polarization is reported. By utilizing a compliant intermediate layer, the surface topographies increase with a factor 10, from roughly 70–100 nm to 1 µm. This increase in topography height is accompanied by a superimposed dynamic oscillation with an amplitude of ≈100 nm. These values can be translated to a 16.7% average static strain with 3.3% oscillations with respect to the coating thickness. Moreover, utilizing the complying support increases the maximum rotation speeds with an in-phase response from 2.5 up to 25° s−1. However, at this maximized rotation speed the oscillation amplitude decreases to about half of the initial value.

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