TY  - JOUR
AU  - Cmok, Luka
AU  - Mattiazzi, Simon
AU  - Drevensek-Olenik, Irena
AU  - Sebastian, Nerea
AU  - Gak Simić, Kristina
AU  - Trišović, Nemanja
AU  - Vilfan, Mojca
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5955
AB  - We report on observations of optical switching in bent-core liquid crystals possessing azocinnamoyl groups in both elongated side arms. UV-activated switching was observed in two of the synthesised materials, both of which were studied optically and with dielectric spectroscopy. Polarising microscopy was used to measure the changes in optical transmittance, and while no illumination effect was seen in the nematic phase, visible changes were observed in the smectic phase, most pronounced in the close vicinity of the smectic to nematic-phase transition. Switching dynamics was characterised, and we found that the average switching time varies strongly with temperature. The relaxation process is faster (below (Formula presented.)) and exhibits no significant temperature dependence. Dielectric measurements have shown that the observed smectic C phases were not polar with the molecules possessing a rather small electric dipole moment. Upon illumination, small differences in the dielectric permittivity were observed only in the smectic phase, suggesting that the illumination effect can be attributed to changes in the molecular conformational and orientational order.
PB  - Taylor and Francis Ltd.
T2  - Liquid Crystals
T1  - Optical switching of bent-core liquid crystals with azocinnamoyl units
DO  - 10.1080/02678292.2023.2179120
ER  - 

@article{
author = "Cmok, Luka and Mattiazzi, Simon and Drevensek-Olenik, Irena and Sebastian, Nerea and Gak Simić, Kristina and Trišović, Nemanja and Vilfan, Mojca",
year = "2023",
abstract = "We report on observations of optical switching in bent-core liquid crystals possessing azocinnamoyl groups in both elongated side arms. UV-activated switching was observed in two of the synthesised materials, both of which were studied optically and with dielectric spectroscopy. Polarising microscopy was used to measure the changes in optical transmittance, and while no illumination effect was seen in the nematic phase, visible changes were observed in the smectic phase, most pronounced in the close vicinity of the smectic to nematic-phase transition. Switching dynamics was characterised, and we found that the average switching time varies strongly with temperature. The relaxation process is faster (below (Formula presented.)) and exhibits no significant temperature dependence. Dielectric measurements have shown that the observed smectic C phases were not polar with the molecules possessing a rather small electric dipole moment. Upon illumination, small differences in the dielectric permittivity were observed only in the smectic phase, suggesting that the illumination effect can be attributed to changes in the molecular conformational and orientational order.",
publisher = "Taylor and Francis Ltd.",
journal = "Liquid Crystals",
title = "Optical switching of bent-core liquid crystals with azocinnamoyl units",
doi = "10.1080/02678292.2023.2179120"
}

Cmok, L., Mattiazzi, S., Drevensek-Olenik, I., Sebastian, N., Gak Simić, K., Trišović, N.,& Vilfan, M.. (2023). Optical switching of bent-core liquid crystals with azocinnamoyl units. in Liquid Crystals
Taylor and Francis Ltd...
https://doi.org/10.1080/02678292.2023.2179120

Cmok L, Mattiazzi S, Drevensek-Olenik I, Sebastian N, Gak Simić K, Trišović N, Vilfan M. Optical switching of bent-core liquid crystals with azocinnamoyl units. in Liquid Crystals. 2023;.
doi:10.1080/02678292.2023.2179120 .

Cmok, Luka, Mattiazzi, Simon, Drevensek-Olenik, Irena, Sebastian, Nerea, Gak Simić, Kristina, Trišović, Nemanja, Vilfan, Mojca, "Optical switching of bent-core liquid crystals with azocinnamoyl units" in Liquid Crystals (2023),
https://doi.org/10.1080/02678292.2023.2179120 . .