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Materials 2016, 9(7), 525; doi:10.3390/ma9070525

Photoresist Design for Elastomeric Light Tunable Photonic Devices

1
European Laboratory for Non-Linear Spectroscopy (LENS), University of Florence, via Nello Carrara 1, 50019 Sesto Fiorentino, Italy
2
Department of Chemistry “Ugo Schiff”, University of Florence, via Della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
3
CNR-INO, Sede Secondaria di Sesto Fiorentino, via Nello Carrara 1, 50019 Sesto Fiorentino, Italy
These authors contributed equally.
*
Author to whom correspondence should be addressed.
Academic Editor: Dariusz M. Bieliński
Received: 9 May 2016 / Revised: 9 June 2016 / Accepted: 21 June 2016 / Published: 29 June 2016
(This article belongs to the Special Issue Advances in Research on Elastomers)
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Abstract

An increasing interest in tunable photonic structures is growing within the photonic community. The usage of Liquid Crystalline Elastomer (LCE) structures in the micro-scale has been motivated by the potential to remotely control their properties. In order to design elastic photonic structures with a three-dimensional lithographic technique, an analysis of the different mixtures used in the micro-printing process is required. Previously reported LCE microstructures suffer damage and strong swelling as a limiting factor of resolution. In this article, we reported a detailed study on the writing process with four liquid crystalline photoresists, in which the percentage of crosslinker is gradually increased. The experiments reveal that exploiting the crosslinking degree is a possible means in which to obtain suspended lines with good resolution, quite good rigidity, and good elasticity, thereby preserving the possibility of deformation by light irradiation. View Full-Text
Keywords: liquid crystalline elastomers; direct laser writing; azobenzene containing polymers liquid crystalline elastomers; direct laser writing; azobenzene containing polymers
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Nocentini, S.; Martella, D.; Parmeggiani, C.; Wiersma, D.S. Photoresist Design for Elastomeric Light Tunable Photonic Devices. Materials 2016, 9, 525.

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