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Optical switching of bent-core liquid crystals with azocinnamoyl units
ID
Cmok, Luka
(
Avtor
),
ID
Mattiazzi, Simon
(
Avtor
),
ID
Drevenšek Olenik, Irena
(
Avtor
),
ID
Sebastián Ugarteche, Nerea
(
Avtor
),
ID
Gak Simić, Kristina
(
Avtor
),
ID
Trišović, Nemanja
(
Avtor
),
ID
Vilfan, Mojca
(
Avtor
)
PDF - Predstavitvena datoteka,
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MD5: 48B7EEFB9C8A6A2A9363752830A7847B
URL - Izvorni URL, za dostop obiščite
https://www.tandfonline.com/doi/full/10.1080/02678292.2023.2179120
Galerija slik
Izvleček
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 200 ms) 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.
Jezik:
Angleški jezik
Ključne besede:
bent-core liquid crystals
,
photo-switching
,
azocinnamoyl group
,
optical switching
,
switching dynamics
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FMF - Fakulteta za matematiko in fiziko
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2023
Št. strani:
Str. 1599–1607
Številčenje:
Vol. 50, no. 7/10
PID:
20.500.12556/RUL-152840
UDK:
532
ISSN pri članku:
1366-5855
DOI:
10.1080/02678292.2023.2179120
COBISS.SI-ID:
142935299
Datum objave v RUL:
08.12.2023
Število ogledov:
324
Število prenosov:
28
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Liquid crystals
Skrajšan naslov:
Liq. cryst.
Založnik:
Taylor & Francis
ISSN:
1366-5855
COBISS.SI-ID:
18299943
Licence
Licenca:
CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:
Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
tekoči kristali z upognjeno sredico
,
fotopreklapljanje
,
azocinamat
,
optično preklapljanje
,
dinamika preklapljanja
,
tekoči kristali
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P1-0192
Naslov:
Svetloba in snov
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
BI-RS/20-32-033
Financer:
MESTD - Ministry of Education, Science and Technological Development of Republic of Serbia
Številka projekta:
451-03-68/2022-14/200135
Financer:
MESTD - Ministry of Education, Science and Technological Development of Republic of Serbia
Številka projekta:
451-03-68/2022-14/200287
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