The molecular dynamics of nematic liquid crystal confined in porous membranes treated by different surfactants

• Autorzy: Różański Stanisław Andrzej

Identyfikatory

DOI

10.1016/j.opelre.2019.11.004

• Języki publikacji: EN

Abstrakty

EN

The molecular dynamics of the well-known nematic liquid crystal 4-n-pentyl-4′-cyanobiphenyl geometrically restricted in Anopore and Synpor porous membranes with various pore structure and treated by different surfactants (namely decanoic acid and lecithin) is compared. In the Anopore membrane the chosen surfactants induce the homeotropic orientation of the molecules on the walls of the cylindrical pores and observed corresponding relaxation processes (librational modes) are practically the same. The dielectric measurements of lecithin treated Synpor membranes reveals the reorientation of the molecules from planar to homeotropic on the complex multilayer structure present in their volume. The dielectric strengths of the observed two molecular processes (δ-process and librational mode) are inversed in the ratio compared to the untreated membranes. The observed differences in molecular dynamics results from the orientation of the liquid crystal molecules in untreated and treated membranes and the structure of the membranes themselves.

Słowa kluczowe

EN

dielectric spectroscopy; molecular dynamics; confinement; nematic liquid crystal; porous membranes; surfactants

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2019
• Tom: Vol. 27, No. 4
• Strony: 339--344
• Opis fizyczny: Bibliogr. 47 poz., fot., rys.

Twórcy

autor

Różański Stanisław Andrzej

• Stanisław Staszic University of Applied Sciences in Piła, 10 Podchorążych St., Piła 64-920, Poland

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).