Zobrazeno 1 - 10
of 262
pro vyhledávání: '"Lavrentovich, O."'
Publikováno v:
Physical Review Research 1, 033215 (2019)
Heliconical cholesteric liquid crystals are expected to be more sensitive to torque induced by light field since their structure allows both bend and twist in molecular orientations, differently from the conventional cholesterics in which only twist
Externí odkaz:
http://arxiv.org/abs/2001.11583
Autor:
Parsouzi, Z., Pardaev, Shokir A., Welch, C., Ahmed, Z., Mehl, G. H., Baldwin, A. R., Gleeson, J. T., Lavrentovich, O. D., Allender, D. W., Selinger, J. V., Jakli, A., Sprunt, S.
The nematic twist-bend (TB) phase, exhibited by certain achiral thermotropic liquid crystalline (LC) dimers, features a nanometer-scale, heliconical rotation of the average molecular long axis (director) with equally probable left- and right-handed d
Externí odkaz:
http://arxiv.org/abs/1609.04380
Autor:
Sh, Z. Parsouzi. A., Shamid, S. M., Borshch, V., Challa, P. K., Tamba, M. G., Welch, C., Mehl, G. H., Gleeson, J. T., Jakli, A., Lavrentovich, O. D., Allender, D. W., Selinger, J. V., Sprunt, S.
Publikováno v:
Phys. Rev. X 6, 021041 (2016)
We report a dynamic light scattering study of the fluctuation modes in a thermotropic liquid crystalline mixture of monomer and dimer compounds that exhibits the twist-bend nematic ($\mathrm{N_{TB}}$) phase. The results reveal a spectrum of overdampe
Externí odkaz:
http://arxiv.org/abs/1512.03102
We report on the first direct nanoscale imaging of elementary edge dislocations in a thermotropic chiral smectic C liquid crystal with the Burgers vector equal to one smectic layer spacing d. We find two different types of dislocation profiles. In th
Externí odkaz:
http://arxiv.org/abs/1507.05940
Autor:
Challa, P. K., Borshch, V., Parri, O., Imrie, C. T., Sprunt, S. N., Gleeson, J. T., Lavrentovich, O. D., Jakli, A.
Publikováno v:
Physical Review E 89, 060501(R) (2014)
We present magneto-optic measurements on two materials that form the recently discovered twist-bend nematic (Ntb) phase. This intriguing state of matter represents a new fluid phase that is orientationally anisotropic in three directions and also exh
Externí odkaz:
http://arxiv.org/abs/1407.8349
Lyotropic chromonic liquid crystal semiconductors for water-solution processable organic electronics
Autor:
Nazarenko, V. G., Boiko, O. P., Anisimov, M. I., Kadashchuk, A. K., Nastishin, Yu. A., Golovin, A. B., Lavrentovich, O. D.
Publikováno v:
Appl.Phys.Lett. 97, 263305 (2010)
We propose lyotropic chromonic liquid crystals (LCLCs) as a distinct class of materials for organic electronics. In water, the chromonic molecules stack on top of each other into elongated aggregates that form orientationally ordered phases. The alig
Externí odkaz:
http://arxiv.org/abs/1101.0742
Autor:
Nazarenko, V. G., Boiko, O. P., Park, H. -S., Brodyn, O. M., Omelchenko, M. M., Tortora, L., Nastishin, Yu. A., Lavrentovich, O. D.
The surface alignment of lyotropic chromonic liquid crystals (LCLCs) can be not only planar (tangential) but also homeotropic, with self-assembled aggregates perpendicular to the substrate, as demonstrated by mapping optical retardation and by three-
Externí odkaz:
http://arxiv.org/abs/1006.3589
Using dynamic light scattering, we measure for the first time the temperature-dependent elastic moduli and associated orientational viscosity coefficients of the nematic phase in a self-assembled lyotropic chromonic liquid crystal. The bend K3 and sp
Externí odkaz:
http://arxiv.org/abs/0807.2669
Autor:
Smalyukh, I. I., Senyuk, B. I., Palffy-Muhoray, P., Lavrentovich, O. D., Huang, H., Gartland, Jr., E. C., Bodnar, V. H., Kosa, T., Taheri, B.
We study the phase diagram of director structures in cholesteric liquid crystals of negative dielectric anisotropy in homeotropic cells of thickness d which is smaller than the cholesteric pitch p. The basic control parameters are the frustration rat
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512365
Using laser tweezers and fluorescence confocal polarizing microscopy, we study colloidal interactions of solid microspheres in the nematic bulk caused by elastic distortions around the particles with strong tangential surface anchoring. The particles
Externí odkaz:
http://arxiv.org/abs/cond-mat/0508331