Browsing Electronic & Electrical Eng (Scholarly Publications) by Author "PANOV, VITALI"
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Dependence of the molecular orientational states on the surface conditions for the "V-shaped switching" in a ferroelectriclike liquid crystal sample
VIJ, JAGDISH; FUKUDA, ATSUO; PANOV, VITALI (2001)The three-component mixture showing the V-shaped switching in a rubbing cell is investigated using a temperature gradient cell (TGC) where the epitaxial method of alignment, but without an alignment layer, is used. The ... -
Dielectric and electro-optic studies of a bimesogenic liquid crystal composed of bent-core and calamitic units
VIJ, JAGDISH; PANOV, VITALI (2014)A bimesogen, BR1, composed of a bent-core and calamitic unit, linked laterally via a flexible spacer is investigated by dielectric and electro-optic techniques. X-ray results show the presence of clusters in the nematic ... -
Discontinuous change in the smectic layer thickness in ferrielectric liquid crystals
VIJ, JAGDISH; PANARIN, YURI; PANOV, VITALI (2007)The temperature dependence of the thickness of thick free-standing films is studied using a high-resolution film thickness measurement technique. A small discontinuity in the temperature dependence of the smectic layer ... -
Discrete flexoelectric polarizations and biaxial subphases with periodicities other than 3- and 4-layers in chiral smectic liquid crystals frustrated between ferroelectricity and antiferroelectricity
VIJ, JAGDISH; PANOV, VITALI; FUKUDA, ATSUO (2005)The subphase for the temperature range that lies in between Sm-CA* and the three-layer Sm-CA*(1 3) subphase has been confirmed to exist using the measurements of electric-field-induced birefringence, optical rotation, and ... -
Effect of cybotactic clusters on the elastic and flexoelectric properties of bent-core liquid crystals belonging to the same homologous series
VIJ, JAGDISH; PANOV, VITALI (2013)We report results of the splay ( K 11 ) and bend ( K 33 ) elastic constants and the effective flexoelectric coefficient of three bent-core liquid crystals belonging to a homologous series of 4-cyanoresorcinol ... -
Field-induced periodic chiral pattern in the Nx phase of achiral bimesogens
VIJ, JAGDISH; PANOV, VITALI (2012)Some hydrocarbon-linked mesogenic dimers are known to exhibit an additional nematic phase (Nx) in the temperature range below the conventional nematic (Nu) phase. One of the features of this phase is the presence of optical ... -
Investigations of nano-scale helical pitch in SmCá* and SmC* phases of a chiral smectic liquid crystal using differential optical reflectivity measurements
VIJ, JAGDISH; PANOV, VITALI (2006)Differential optical reflectivity (DOR) was used to study the temperature dependence of the short helical pitch in freestanding films of a liquid crystal compound. The experimentally measured DOR signal was fitted using ... -
Microsecond linear optical response in the unusual nematic phase of achiral bimesogens
VIJ, JAGDISH; BALACHANDARAN, RESHMA; NAGARAJ, MAMATHA; PANOV, VITALI (2011)Some hydrocarbon linked mesogenic dimers are known to exhibit an additional nematic phase (N(x)) below a conventional uniaxial nematic (N(u)) phase. Although composed of non-chiral molecules, the N(x) phase is found to ... -
Optical confirmation of biaxial nematic (Nb) phase in a bent-core mesogen
VIJ, JAGDISH; PANOV, VITALI (2009)A bent-core mesogen with different end groups has been studied for different surface conditions in both planar and homeotropic cells using techniques for measuring biaxiality and optical switching. Biaxial nematic phase ... -
Optical rotatory power, biaxiality and the models of the chiral tilted smectic phases
VIJ, JAGDISH; PANOV, VITALI (2003)Among the chiral tilted smectics, the stable existence has been confirmed in numerous investigations of SmCA*, ~antiferroelectric smectic-CA) SmCF11* (SmCg*), SmCF12* ~antiferroelectric, AF! and SmC* phases. The structures ... -
Orientational order of a ferroelectric liquid crystal with small layer contraction
PANOV, VITALI; FUKUDA, ATSUO; VIJ, JAGDISH (2010)We present spectroscopic and optical studies of a non-layer-shrinkage ferroelectric liquid crystal DSiKN65. The orientational order parameters S, measured with respect to the smectic layer normal using IR spectroscopy on ... -
Self-assembled uniaxial and biaxial multilayer structures in chiral smectic liquid crystals frustrated between ferro- and antiferroelectricity
FUKUDA, ATSUO; PANOV, VITALI; VIJ, JAGDISH KUMAR (2004)With a view to obtain a molecular model for the subphases produced by the frustration between ferro- and antiferroelectricity in chiral smectic liquid crystals, we report results on two compounds and observe (i) the staircase ... -
Short-range correlations seen in the nematic phase of bent-core liquid crystals by dielectric and electro-optic studies
VIJ, JAGDISH; JANG, YUN; PANOV, VITALI; KOCOT, ANTONI (2011)Three bent-core nematic liquid crystals having the same core but with different terminal groups, short (C4) and long (C7,C9) tails, are investigated by dielectric and electro-optic contrast spectroscopic techniques. C4 ... -
Sign reversal in the dielectric anisotropy as functions of temperature and frequency in the nematic phase of a bent-core mesogen
VIJ, JAGDISH; JANG, YUN; PANOV, VITALI (2010)The sign reversal in the dielectricanisotropy(???????) from positive to negative is observed for 4-cyanoresorcinol bisbenzoate system with temperature and frequency in the nematic phase of a bent-core system as the temperature ...