Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment

We provide experimental evidence for the influence of the molecular structure of the nematic liquid crystal (NLC) on the photoalignment process in three dimensions at the interface with a polymer layer. In particular, the experimental findings are explained through the presence (or absence) of the &...

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Main Authors:	Ameer R. K. Nassrah, István Jánossy, Viktor Kenderesi, Tibor Tóth-Katona
Format:	Article
Language:	English
Published:	MDPI AG 2021-01-01
Series:	Polymers
Subjects:	nematic–polymer interface photoalignment optical sensors optical actuators
Online Access:	https://www.mdpi.com/2073-4360/13/2/193

id	doaj-65440909fc124db6b20ad59a0c2627cf
record_format	Article
spelling	doaj-65440909fc124db6b20ad59a0c2627cf2021-01-08T00:01:16ZengMDPI AGPolymers2073-43602021-01-011319319310.3390/polym13020193Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in PhotoalignmentAmeer R. K. Nassrah0István Jánossy1Viktor Kenderesi2Tibor Tóth-Katona3Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, P.O. Box 49, H-1525 Budapest, HungaryWigner Research Centre for Physics, Institute for Solid State Physics and Optics, P.O. Box 49, H-1525 Budapest, HungaryWigner Research Centre for Physics, Institute for Solid State Physics and Optics, P.O. Box 49, H-1525 Budapest, HungaryWigner Research Centre for Physics, Institute for Solid State Physics and Optics, P.O. Box 49, H-1525 Budapest, HungaryWe provide experimental evidence for the influence of the molecular structure of the nematic liquid crystal (NLC) on the photoalignment process in three dimensions at the interface with a polymer layer. In particular, the experimental findings are explained through the presence (or absence) of the <inline-formula><math display="inline"><semantics><mrow><mi>π</mi><mo>−</mo><mi>π</mi></mrow></semantics></math></inline-formula> aromatic interactions between the NLC and the polymer. The influence of the nematic-to-smectic A phase transition on the photocontrol is also addressed. Furthermore, we demonstrate that the photo-induced reorientation scenarios can be eventually connected to conformational changes in the photosensitive polymer.https://www.mdpi.com/2073-4360/13/2/193nematic–polymer interfacephotoalignmentoptical sensorsoptical actuators
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Ameer R. K. Nassrah István Jánossy Viktor Kenderesi Tibor Tóth-Katona
spellingShingle	Ameer R. K. Nassrah István Jánossy Viktor Kenderesi Tibor Tóth-Katona Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment Polymers nematic–polymer interface photoalignment optical sensors optical actuators
author_facet	Ameer R. K. Nassrah István Jánossy Viktor Kenderesi Tibor Tóth-Katona
author_sort	Ameer R. K. Nassrah
title	Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment
title_short	Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment
title_full	Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment
title_fullStr	Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment
title_full_unstemmed	Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment
title_sort	polymer–nematic liquid crystal interface: on the role of the liquid crystalline molecular structure and the phase sequence in photoalignment
publisher	MDPI AG
series	Polymers
issn	2073-4360
publishDate	2021-01-01
description	We provide experimental evidence for the influence of the molecular structure of the nematic liquid crystal (NLC) on the photoalignment process in three dimensions at the interface with a polymer layer. In particular, the experimental findings are explained through the presence (or absence) of the <inline-formula><math display="inline"><semantics><mrow><mi>π</mi><mo>−</mo><mi>π</mi></mrow></semantics></math></inline-formula> aromatic interactions between the NLC and the polymer. The influence of the nematic-to-smectic A phase transition on the photocontrol is also addressed. Furthermore, we demonstrate that the photo-induced reorientation scenarios can be eventually connected to conformational changes in the photosensitive polymer.
topic	nematic–polymer interface photoalignment optical sensors optical actuators
url	https://www.mdpi.com/2073-4360/13/2/193
work_keys_str_mv	AT ameerrknassrah polymernematicliquidcrystalinterfaceontheroleoftheliquidcrystallinemolecularstructureandthephasesequenceinphotoalignment AT istvanjanossy polymernematicliquidcrystalinterfaceontheroleoftheliquidcrystallinemolecularstructureandthephasesequenceinphotoalignment AT viktorkenderesi polymernematicliquidcrystalinterfaceontheroleoftheliquidcrystallinemolecularstructureandthephasesequenceinphotoalignment AT tibortothkatona polymernematicliquidcrystalinterfaceontheroleoftheliquidcrystallinemolecularstructureandthephasesequenceinphotoalignment
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Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment

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