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Pregled bibliografske jedinice broj: 1226473

Nematic-like elastic coefficients of the SmAb phase


Meyer, Claire; Davidson, Patrick; Sergan, Tatiana; Sergan, Vassili; Stoenescu, Daniel; Knežević, Anamarija; Dokli, Irena; Lesac, Andreja; Dozov, Ivan
Nematic-like elastic coefficients of the SmAb phase // Liquid Crystals, 49 (2022), 1-17 doi:10.1080/02678292.2022.2114026 (međunarodna recenzija, članak, znanstveni)


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Naslov
Nematic-like elastic coefficients of the SmAb phase

Autori
Meyer, Claire ; Davidson, Patrick ; Sergan, Tatiana ; Sergan, Vassili ; Stoenescu, Daniel ; Knežević, Anamarija ; Dokli, Irena ; Lesac, Andreja ; Dozov, Ivan

Izvornik
Liquid Crystals (0267-8292) 49 (2022); 1-17

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
liquid crystals, nematic, smectic, elastic constants, defects

Sažetak
The synthesis of bent-shaped mesogens and mesogenic dimers has renewed the field of liquid crystals in many ways during the previous decades, for example, through the discovery of ‘exotic’ mesophases such as the twist-bend nematic phase and the biaxial SmA phase (SmAb). Recently, we reported on the observation of a SmAb with a bent- shaped dimer, and on its fast electro-optic effect that we interpreted as a biaxial Fréedericksz transition (BFrTr) of the secondary m-director under applied electric field (C. Meyer et al., Phys. Rev. X, 11, 031012 (2021)). In this study, we used dielectric and birefringence techniques to directly measure the splay, Km11, and bend, Km33, elastic constants that characterise the elastic distortion modes of the m-director. We observed that during the BFrTr, domains of opposite tilt appear and are often enclosed in elliptical defect loops, just like those observed during the usual Fréedericksz transition of common nematics, which allowed us to obtain the third (twist) elastic constant Km22, from the defect loop ellipticity. Although Km11 and Km33 are of the same order of magnitude as K11 and K33 in the nematic phase of bent-shaped dimers, Km22 is an order of magnitude smaller than Km11 and Km33 and also than K22 of 5CB. We argue that these features could be generic for the intercalated SmAb phase of bent-shaped dimers.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekti:
HRZZ-IP-2019-04-7978 - Strukturna kiralnost vs molekulska kiralnost (SMChiral) (Lesac, Andreja, HRZZ - 2019-04) ( CroRIS)

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Irena Dokli (autor)

Avatar Url Anamarija Knežević (autor)

Avatar Url Andreja Lesac (autor)

Poveznice na cjeloviti tekst rada:

doi www.tandfonline.com

Citiraj ovu publikaciju:

Meyer, Claire; Davidson, Patrick; Sergan, Tatiana; Sergan, Vassili; Stoenescu, Daniel; Knežević, Anamarija; Dokli, Irena; Lesac, Andreja; Dozov, Ivan
Nematic-like elastic coefficients of the SmAb phase // Liquid Crystals, 49 (2022), 1-17 doi:10.1080/02678292.2022.2114026 (međunarodna recenzija, članak, znanstveni)
Meyer, C., Davidson, P., Sergan, T., Sergan, V., Stoenescu, D., Knežević, A., Dokli, I., Lesac, A. & Dozov, I. (2022) Nematic-like elastic coefficients of the SmAb phase. Liquid Crystals, 49, 1-17 doi:10.1080/02678292.2022.2114026.
@article{article, author = {Meyer, Claire and Davidson, Patrick and Sergan, Tatiana and Sergan, Vassili and Stoenescu, Daniel and Kne\v{z}evi\'{c}, Anamarija and Dokli, Irena and Lesac, Andreja and Dozov, Ivan}, year = {2022}, pages = {1-17}, DOI = {10.1080/02678292.2022.2114026}, keywords = {liquid crystals, nematic, smectic, elastic constants, defects}, journal = {Liquid Crystals}, doi = {10.1080/02678292.2022.2114026}, volume = {49}, issn = {0267-8292}, title = {Nematic-like elastic coefficients of the SmAb phase}, keyword = {liquid crystals, nematic, smectic, elastic constants, defects} }
@article{article, author = {Meyer, Claire and Davidson, Patrick and Sergan, Tatiana and Sergan, Vassili and Stoenescu, Daniel and Kne\v{z}evi\'{c}, Anamarija and Dokli, Irena and Lesac, Andreja and Dozov, Ivan}, year = {2022}, pages = {1-17}, DOI = {10.1080/02678292.2022.2114026}, keywords = {liquid crystals, nematic, smectic, elastic constants, defects}, journal = {Liquid Crystals}, doi = {10.1080/02678292.2022.2114026}, volume = {49}, issn = {0267-8292}, title = {Nematic-like elastic coefficients of the SmAb phase}, keyword = {liquid crystals, nematic, smectic, elastic constants, defects} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati:





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