scholarly journals Frank Matthews Leslie. 8 March 1935 – 15 June 2000

2003 ◽  
Vol 49 ◽  
pp. 315-333 ◽  
Author(s):  
R.J. Atkin ◽  
T.J. Sluckin
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Liquid Crystal Display ◽  
Nematic Liquid Crystals ◽  
Continuum Theory ◽  
Hydrodynamic Theory ◽  
Smectic Liquid Crystals ◽  
Applied Mathematician ◽  
Similar Task ◽  
Device Technology

Frank Leslie was a distinguished applied mathematician, who was above all foremost in creating the modern continuum theory of nematic liquid crystals in the late 1960s. This theory is now known as the Ericksen-Leslie theory, and the crucial elements in it as Leslie coefficients. After developing the hydrodynamic theory of nematic liquid crystals, he went on to perform a similar task in the 1990s for smectic liquid crystals. He also actively collaborated with experimentalists and engineers involved in liquid crystal applications, and his work has been extremely influential in the development of liquid crystal display (LCD) device technology.

scholarly journals Study of electrical behavior of liquid crystal devices doped with titanium dioxide nanoparticles

2017 ◽  
Vol 9 (1) ◽  
pp. 20
Author(s):  
Vicente Marzal ◽  
Juan Carlos Torres ◽  
Braulio García ◽  
Isabel Pérez ◽  
José Manuel Sánchez ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Titanium Dioxide Nanoparticles ◽  
Liquid Crystal Display ◽  
Electrical Response ◽  
Nematic Liquid Crystals ◽  
Effective Permittivity ◽  
Temperature Phase ◽  
Ferroelectric Liquid Crystal

In the last years, nanostructures are widely used as dopants in liquid crystals to manipulate either their electrical or optical properties. In this work, we have analyzed the electrical response of a planar cell filled with a mixture of E7 liquid crystal doped with TiO2 nanoparticles. The effect of these dopants on the effective permittivity and conductivity of the cell has been studied in a wide frequency range at different temperatures. Full Text: PDF ReferencesP.J. Pinzón, I. Pérez, C. Vázquez and J.M.S. Pena, "Reconfigurable ????×????1×2 wavelength selective switch using high birefringence nematic liquid crystals", App.Opt. 51, pp.5960-5965 (2012) CrossRef C. Carrasco-Vela, X. Quintana, E.Otón, M.A. Geday, J.M. Otón, "Security devices based on liquid crystals doped with a colour dye", Opto?Electron. 19, pp.496-500 (2011). CrossRef J. Torrecilla, E. Ávila-Navarro, C. Marcos, V. Urruchi, J.M.S. Pena, J. Arias, M.M Sánchez-López, "Microwave Tunable Notch Filter Based on Liquid Crystal Using Spiral Spurline Technology", Microw. Opt. Technol. Lett. 55, 2420-2423 (2013). CrossRef G.B. Hadjichristov, Y. G. Marinov, A. G. Petrov, E. Bruno, L.Marino, N. Scaramuzzab, "Electro-Optics of Nematic/Gold Nanoparticles Composites: The Effect from Dopants", Mol. Cryst. Liq. Cryst. 610, 135?148 (2015). CrossRef T. Miyama, J. Thisayukta, H. Shiraki, Y. Sakai, Y. Shiraishi, N. Toshima, S. Kobayashi, "Fast Switching of Frequency Modulation Twisted Nematic Liquid Crystal Display Fabricated by Doping Nanoparticles and Its Mechanism", Jpn. J. Appl. Phys. 43, 2580 -2584 (2004). CrossRef W. T. Chen, P. S. Chen, C. Y. Chao, "Effect of Doped Insulating Nanoparticles on the Electro-Optical Characteristics of Nematic Liquid Crystals", Jpn. J. Appl. Phys. 48, 015006 (2009) CrossRef A. Siarkowska, M. Chychłowski, T.R. Woliński and A.Dybko. "Titanium nanoparticles doping of 5CB infiltrated microstructured optical fibers", Phot. Lett. Poland 8, 29-31 (2016). CrossRef O. Buchnev, A. Dyadyusha,M. Kaczmarek, V.Reshetnyak, Y. Reznikov, "Enhanced two-beam coupling in colloids of ferroelectric nanoparticles in liquid crystals", J. Opt. Soc. Am. 24, 1512-1516 (2004). CrossRef A. García-García, R. Vergaz, J.A. Algorri, X. Quintana, J.M. Otón, Beilstein J. "Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes", Nanotechnol. 6, 396?403 (2015). CrossRef R. Pratibha, K. Park, I.I. Smalyukh and W. Park, "Tunable optical metamaterial based on liquid crystal-gold nanosphere composite", Opt. Express 17,19459-19469 (2009). CrossRef J.C. Torres, B. Garcia-Camara, I. Perez, V. Urruchi, J.M. Sanchez-Pena, "Temperature-Phase Converter Based on a LC Cell as a Variable Capacitance", Sensors 15, 5594 ? 5608 (2015). CrossRef P. Kumar, A. Kishore and A, Sinha, "Effect of different concentrations of dopant titanium dioxide nanoparticles on electro-optic and dielectric properties of ferroelectric liquid crystal mixture ", Adv. Mater. Lett. 7, 104-110 (2016). CrossRef R.K. Shukla, C.M. Liebig, D.R. Evans, and W. Haase, "Electro-optical behaviour and dielectric dynamics of harvested ferroelectric LiNbO3 nanoparticle-doped ferroelectric liquid crystal nanocolloids", RSC Adv. 4, 18529-18536 (2014). CrossRef

New structure induced by elastic anisotropy in cylindrical nematic liquid crystal

2017 ◽  
Vol 13 (2) ◽  
pp. 4705-4717
Author(s):  
Zhang Qian ◽  
Zhou Xuan ◽  
Zhang Zhidong
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystal ◽  
Elastic Anisotropy ◽  
Nematic Liquid Crystals ◽  
Gennes Theory

Basing on Landau–de Gennes theory, this study investigated the chiral configurations of nematic liquid crystals confined to cylindrical capillaries with homeotropic anchoring on the cylinder walls. When the elastic anisotropy (L2/L1) is large enough, a new structure results from the convergence of two opposite escape directions of the heterochiral twist and escape radial (TER) configurations. The new defect presents when L2/L1≥7 and disappears when L2/L1<7. The new structure possesses a heterochiral hyperbolic defect at the center and two homochiral radial defects on both sides. The two radial defects show different chiralities.

Shear flow simulations of smectic liquid crystals based on the Gay–Berne fluid and the soft sphere string-fluid

2019 ◽  
Vol 21 (1) ◽  
pp. 292-305 ◽  
Author(s):  
Sten Sarman ◽  
Yong-Lei Wang ◽  
Aatto Laaksonen
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Shear Flow ◽  
Smectic Liquid Crystals ◽  
Soft Sphere ◽  
Flow Simulations ◽  
Smectic Liquid Crystal

Smectic liquid crystal undergoing shear flow.

Optically isotropic liquid crystal media formulated by doping star-shaped cyclic oligosiloxane liquid crystal surfactants in twin nematic liquid crystals

Soft Matter ◽  
2015 ◽  
Vol 11 (19) ◽  
pp. 3772-3779 ◽  
Author(s):  
Namil Kim ◽  
Dae-Yoon Kim ◽  
Minwook Park ◽  
Yu-Jin Choi ◽  
Soeun Kim ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Isotropic Liquid

The formation of an optically isotropic liquid crystal (LC) medium by doping the star-shaped LC molecular surfactant in a nematic LC medium may allow us to develop new electro-optical LC devices.

scholarly journals Regularity Criterion for the 3D Nematic Liquid Crystal Flows

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Jishan Fan ◽  
Tohru Ozawa
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystal ◽  
Regularity Criterion ◽  
Hydrodynamic Theory ◽  
Nematic Liquid Crystal Flows

We study the hydrodynamic theory of liquid crystals. We prove a logarithmically improved regularity criterion for two simplified Ericksen-Leslie systems.

Ideal Liquid Crystal Display Mode Using Achiral Banana-Shaped Liquid Crystals

2006 ◽  
Vol 45 (No. 10) ◽  
pp. L282-L284 ◽  
Author(s):  
Yoshio Shimbo ◽  
Yoichi Takanishi ◽  
Ken Ishikawa ◽  
Ewa Gorecka ◽  
Damian Pociecha ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Liquid Crystal Display ◽  
Ideal Liquid ◽  
Display Mode

scholarly journals Electrically Controlled Diffraction Grating in Azo Dye-Doped Liquid Crystals

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1051 ◽  
Author(s):  
Chuen-Lin Tien ◽  
Rong-Ji Lin ◽  
Chi-Chung Kang ◽  
Bing-Yau Huang ◽  
Chie-Tong Kuo ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Electric Fields ◽  
Azo Dye ◽  
Nematic Liquid Crystals ◽  
Polarized Light ◽  
Dielectric Anisotropy ◽  
Linear Effect ◽  
Periodic Distribution ◽  
The Difference

This research applies the non-linear effect of azo dye-doped liquid crystal materials to develop a small, simple, and adjustable beam-splitting component with grating-like electrodes. Due to the dielectric anisotropy and optical birefringence of nematic liquid crystals, the director of the liquid crystal molecules can be reoriented by applying external electric fields, causing a periodic distribution of refractive indices and resulting in a diffraction phenomenon when a linearly polarized light is introduced. The study also discusses the difference in the refractive index (Δn), the concentration of azo dye, and the rising constant depending on the diffraction signals. The experimental results show that first-order diffraction efficiency can reach ~18% with 0.5 wt % azo dye (DR-1) doped in the nematic liquid crystals.

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