Crystalline-like ordering of 8CB liquid crystals revealed by time-domain Brillouin scattering
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014202_1_online.pdf
Description
Published version
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2.4 MB
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Author(s)
Chaban, Ievgeniia
Klieber, Christoph
Busselez, Rémi
Nelson, Keith A
Pezeril, Thomas
Date Issued
January 2, 2020
Journal
The Journal of Chemical Physics
Publisher
AIP Publishing
Citation
Ievgeniia Chaban, Christoph Klieber, Rémi Busselez, Keith A. Nelson, Thomas Pezeril; Crystalline-like ordering of 8CB liquid crystals revealed by time-domain Brillouin scattering. J. Chem. Phys. 7 January 2020; 152 (1): 014202.
Version
Final published version
Abstract
We demonstrate that time-domain Brillouin scattering (TDBS), a technique based on an ultrafast pump-probe approach, is sensitive to phase transitions and apply it to the study of structural changes in 8CB liquid crystals at different temperatures across the isotropic, nematic, smectic, and crystalline phases. We investigate the viscoelastic properties of 8CB squeezed in a narrow gap, from the nanometer to submicrometer thickness range, and conclude on the long-range molecular structuring of the smectic phase. These TDBS results reveal that confinement effects favor structuring of the smectic phase into a crystallinelike phase that can be observed at wide distances far beyond the molecular dimensions.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.5135982
