Zobrazeno 1 - 10
of 75
pro vyhledávání: '"O.R. Santos"'
Publikováno v:
Phase Transitions. 94:546-555
The biaxial nematic ( NB) phase bordered by two uniaxial nematic (discotic – ND and calamitic – NC) phases and the one between ND phases are studied in potassium laurate (KL), decanol (DeOH) and D2...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c4f98546c407fe3ad1846153bf514fc
https://doi.org/10.1080/01411594.2021.1945598
https://doi.org/10.1080/01411594.2021.1945598
Autor:
M. Simões, A.R. Sampaio, A. J. Palangana, G.M. Arcolezi, W.S. Braga, N.M. Kimura, D.D. Luders, M.L.G. Pereira, O.R. Santos
Publikováno v:
Liquid Crystals. 48:974-979
Conoscopic images have confirmed the occurrence of biaxial positive ( N B + ) and biaxial negative ( N B − ) nematic phases between the two uniaxial nematic (discotic – N D and calamitic – N C ) ph...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f71c30b592c4c2484643c8fc23ea44b6
https://doi.org/10.1080/02678292.2020.1836279
https://doi.org/10.1080/02678292.2020.1836279
Publikováno v:
Phase Transitions. 92:1021-1030
Refractive index measurements and conoscopic images has confirmed the occurrence of biaxial negative (NB−) and biaxial positive (NB+) nematic phases between the two uniaxial nematic (calamitic −NC ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c30f91d8ce9bb2cdcd06d5622ba90311
https://doi.org/10.1080/01411594.2019.1670830
https://doi.org/10.1080/01411594.2019.1670830
Autor:
D.D. Luders, A.R. Sampaio, W.S. Braga, A. J. Palangana, O.R. Santos, N.M. Kimura, M. Simões, T. Davincy, W. H. P. Bertolino
Publikováno v:
Phase Transitions. 92:117-125
In this work we will study the behavior of the optical signal and optical axes along the continuous transition of a lyotropic system from a nematic discotic (ND) phase to a nematic calamitic (NC) phase; we will study in detail the case in which there
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5d46e2137e32b7999b03a245994fc5f
https://doi.org/10.1080/01411594.2018.1556269
https://doi.org/10.1080/01411594.2018.1556269
Publikováno v:
Journal of Molecular Liquids. 354:118894
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::144ccd067f6b0b7a47b48afa3d9268a0
https://doi.org/10.1016/j.molliq.2022.118894
https://doi.org/10.1016/j.molliq.2022.118894
An image processing study of a reentrant discotic cholesteric – biaxial cholesteric phase transition
Autor:
A.R. Sampaio, D.D. Luders, W.S. Braga, G. A. Zoner, A. J. Palangana, N.M. Kimura, O.R. Santos, M. Simões
Publikováno v:
Phase Transitions. 91:398-405
In this work, we study and characterize the cholesteric sequence of phases (ChDr − ChB − ChD), where the first ChDr is the reentrant cholesteric discotic phase, ChB is the cholesteric biaxial phase...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d23f341d00be2a584722f1f4af170910
https://doi.org/10.1080/01411594.2017.1403606
https://doi.org/10.1080/01411594.2017.1403606
Akademický článek
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Publikováno v:
Journal of Molecular Liquids. 219:39-44
Here, we propose that some aspects of the phase diagram of nematic lyotropic materials can be put in a universal form. We will show that a simple combination of the order parameter invariants in the uniaxial and biaxial nematic phase is enough to rev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52c1a8bb55e337e53a47ee47ed05b803
https://doi.org/10.1016/j.molliq.2015.12.035
https://doi.org/10.1016/j.molliq.2015.12.035
Publikováno v:
Journal of Molecular Liquids. 213:186-190
The calamitic (NC) and discotic (ND) uniaxial nematic phases are characterized by an order parameter which is a second-rank, symmetric, traceless tensor with two different eigenvalues and the other three in the biaxial nematic (NB) phase. The optical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::171e9fa112b0d08a0c4ce52c89249121
https://doi.org/10.1016/j.molliq.2015.10.058
https://doi.org/10.1016/j.molliq.2015.10.058
Autor:
D.D. Luders, A. J. Palangana, M. Simões, G.M. Arcolezi, W.S. Braga, A.R. Sampaio, O.R. Santos, N.M. Kimura
Publikováno v:
Journal of Molecular Liquids. 298:111752
Cholesteric liquid crystals are consisted of nematic layers, with a small rotation of the director as we pass from one to the other. This rotation produces a helical structure and the distance to perform one full rotation of the director is known as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e55a14b3b1d2a01e460f82808f218455
https://doi.org/10.1016/j.molliq.2019.111752
https://doi.org/10.1016/j.molliq.2019.111752