QNS investigation of d-EBBA core reorientations in oriented nematic and isotropic phases

Autor:	B. Cvikl
Rok vydání:	1996
Předmět:	Materials science Condensed matter physics Isotropy Biophysics High resolution Condensed Matter Physics Core (optical fiber) Crystallography Deuterium Liquid crystal Phase (matter) Molecule Physical and Theoretical Chemistry Structure factor Molecular Biology
Zdroj:	Molecular Physics. 88:419-436
ISSN:	1362-3028 0026-8976
DOI:	10.1080/00268979650026433
Popis:	The QNS high resolution measurements of the elastic incoherent structure factor obtained for the oriented sample of the molecule p-ethoxybenzylidene-p-n-butylphenyl with deuterated tails (d-EBBA) in the nematic and isotropic phases (M. P. Fontana and G. Gallone, 1995, Physica Scripta T, 57, 168) have been interpreted successfully, on the basis of the uniaxial, angular confined, biased reorientational model of the rigid molecular core along its para axis. It was found that the angular span of a corresponding circular segments in the nematic phase roughly scales with the nematic order parameter; however, in the isotropic phase the d-EBBA molecular core uniaxial reorientation is found to be strongly constrained. The physical origin of the potential barriers, constraining the uniaxial reorientation of the d-EBBA molecular core, is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c6f50a74fa04f8180ccfc134e51e40de https://doi.org/10.1080/00268979650026433 Zobrazit plný text záznamu