Inkjet printed liquid crystal cilia

C.L. van Oosten; C.W.M. Bastiaansen; D.J. Broer

doi:10.1002/9783527690534.ch2

Inkjet printed liquid crystal cilia

C.L. van Oosten, C.W.M. Bastiaansen, D.J. Broer

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

Abstract

A widely applied method to form liquid crystal networks (LCNs) is photo‐initiated polymerization of monomers that possess a LC phase. The variety in LC phases of the LC monomers provides diversity in molecular order, all self‐organizing and being preserved by photopolymerization. This chapter first explains the principles of shape deformation in LC networks using the most straightforward case of a thermal actuator. Using the thermal actuator as an example, effects of various alignments such as twisted nematic (TN), splay, and cholesteric order are shown. Next, the chapter demonstrates that LCN actuators can be made to respond to light as trigger. It further deals with an example of miniaturization of actuators for a microfluidic application, where actuators are structured using inkjet printing. For the purpose of inkjet printed cilia, two different azo dyes are used: A3MA and DR1A, a methacrylate and an acrylate, respectively, capable of copolymerizing with the other monomers in the mentioned system.

Original language	English
Title of host publication	Responsive polymer surfaces
Subtitle of host publication	dynamics in surface topography
Editors	Danqing Liu, D.J. Broer
Place of Publication	Weinheim
Publisher	Wiley-VCH Verlag
Chapter	2
Pages	35-56
ISBN (Electronic)	9783527690534
ISBN (Print)	978-3-527-33869-6
DOIs	https://doi.org/10.1002/9783527690534.ch2
Publication status	Published - 2017

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van Oosten, C. L., Bastiaansen, C. W. M., & Broer, D. J. (2017). Inkjet printed liquid crystal cilia. In D. Liu, & D. J. Broer (Eds.), Responsive polymer surfaces: dynamics in surface topography (pp. 35-56). Weinheim: Wiley-VCH Verlag. https://doi.org/10.1002/9783527690534.ch2

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abstract = "A widely applied method to form liquid crystal networks (LCNs) is photo‐initiated polymerization of monomers that possess a LC phase. The variety in LC phases of the LC monomers provides diversity in molecular order, all self‐organizing and being preserved by photopolymerization. This chapter first explains the principles of shape deformation in LC networks using the most straightforward case of a thermal actuator. Using the thermal actuator as an example, effects of various alignments such as twisted nematic (TN), splay, and cholesteric order are shown. Next, the chapter demonstrates that LCN actuators can be made to respond to light as trigger. It further deals with an example of miniaturization of actuators for a microfluidic application, where actuators are structured using inkjet printing. For the purpose of inkjet printed cilia, two different azo dyes are used: A3MA and DR1A, a methacrylate and an acrylate, respectively, capable of copolymerizing with the other monomers in the mentioned system.",

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Access to Document

10.1002/9783527690534.ch2