Direct laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]

Background: The ability to fabricate components capable of performing actuation in a reliable and controlled manner is one of the main research topics in the field of microelectromechanical systems (MEMS). However, the development of these technologies can be limited in many cases by 2D lithographic...

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Autores principales:	Marco Carlotti, Omar Tricinci, Frank den Hoed, Stefano Palagi, Virgilio Mattoli
Formato:	article
Lenguaje:	EN
Publicado:	F1000 Research Limited 2021
Materias:	Science Q Social Sciences H
Acceso en línea:	https://doaj.org/article/23474f0149a445ee8a99a51db1a86c01
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spelling	oai:doaj.org-article:23474f0149a445ee8a99a51db1a86c012021-11-29T14:03:48ZDirect laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]2732-512110.12688/openreseurope.14135.2https://doaj.org/article/23474f0149a445ee8a99a51db1a86c012021-11-01T00:00:00Zhttps://open-research-europe.ec.europa.eu/articles/1-129/v2https://doaj.org/toc/2732-5121Background: The ability to fabricate components capable of performing actuation in a reliable and controlled manner is one of the main research topics in the field of microelectromechanical systems (MEMS). However, the development of these technologies can be limited in many cases by 2D lithographic techniques employed in the fabrication process. Direct Laser Writing (DLW), a 3D microprinting technique based on two-photon polymerization, can offer novel solutions to prepare, both rapidly and reliably, 3D nano- and microstructures of arbitrary complexity. In addition, the use of functional materials in the printing process can result in the fabrication of smart and responsive devices. Methods: In this study, we present a novel methodology for the printing of 3D actuating microelements comprising Liquid Crystal Elastomers (LCEs) obtained by DLW. The alignment of the mesogens was performed using a static electric field (1.7 V/µm) generated by indium-tin oxide (ITO) electrodes patterned directly on the printing substrates. Results: When exposed to a temperature higher than 50°C, the printed microstructures actuated rapidly and reversibly of about 8% in the direction perpendicular to the director. Conclusions: A novel methodology was developed that allows the printing of directional actuators comprising LCEs via DLW. To impart the necessary alignment of the mesogens, a static electric field was applied before the printing process by making use of flat ITO electrodes present on the printing substrates. The resulting microelements showed a reversible change in shape when heated higher than 50 °C.Marco CarlottiOmar TricinciFrank den HoedStefano PalagiVirgilio MattoliF1000 Research LimitedarticleScienceQSocial SciencesHENOpen Research Europe, Vol 1 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Science Q Social Sciences H
spellingShingle	Science Q Social Sciences H Marco Carlotti Omar Tricinci Frank den Hoed Stefano Palagi Virgilio Mattoli Direct laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]
description	Background: The ability to fabricate components capable of performing actuation in a reliable and controlled manner is one of the main research topics in the field of microelectromechanical systems (MEMS). However, the development of these technologies can be limited in many cases by 2D lithographic techniques employed in the fabrication process. Direct Laser Writing (DLW), a 3D microprinting technique based on two-photon polymerization, can offer novel solutions to prepare, both rapidly and reliably, 3D nano- and microstructures of arbitrary complexity. In addition, the use of functional materials in the printing process can result in the fabrication of smart and responsive devices. Methods: In this study, we present a novel methodology for the printing of 3D actuating microelements comprising Liquid Crystal Elastomers (LCEs) obtained by DLW. The alignment of the mesogens was performed using a static electric field (1.7 V/µm) generated by indium-tin oxide (ITO) electrodes patterned directly on the printing substrates. Results: When exposed to a temperature higher than 50°C, the printed microstructures actuated rapidly and reversibly of about 8% in the direction perpendicular to the director. Conclusions: A novel methodology was developed that allows the printing of directional actuators comprising LCEs via DLW. To impart the necessary alignment of the mesogens, a static electric field was applied before the printing process by making use of flat ITO electrodes present on the printing substrates. The resulting microelements showed a reversible change in shape when heated higher than 50 °C.
format	article
author	Marco Carlotti Omar Tricinci Frank den Hoed Stefano Palagi Virgilio Mattoli
author_facet	Marco Carlotti Omar Tricinci Frank den Hoed Stefano Palagi Virgilio Mattoli
author_sort	Marco Carlotti
title	Direct laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]
title_short	Direct laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]
title_full	Direct laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]
title_fullStr	Direct laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]
title_full_unstemmed	Direct laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]
title_sort	direct laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]
publisher	F1000 Research Limited
publishDate	2021
url	https://doaj.org/article/23474f0149a445ee8a99a51db1a86c01
work_keys_str_mv	AT marcocarlotti directlaserwritingofliquidcrystalelastomersorientedbyahorizontalelectricfieldversion2peerreview2approved AT omartricinci directlaserwritingofliquidcrystalelastomersorientedbyahorizontalelectricfieldversion2peerreview2approved AT frankdenhoed directlaserwritingofliquidcrystalelastomersorientedbyahorizontalelectricfieldversion2peerreview2approved AT stefanopalagi directlaserwritingofliquidcrystalelastomersorientedbyahorizontalelectricfieldversion2peerreview2approved AT virgiliomattoli directlaserwritingofliquidcrystalelastomersorientedbyahorizontalelectricfieldversion2peerreview2approved
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Direct laser writing of liquid crystal elastomers oriented by a horizontal electric field [version 2; peer review: 2 approved]

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