Chiral smectic

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August undefined, 2024

WebAbstract Phase sequence of a chiral smectic liquid crystal, MHPOPB, in which the biphenyl group is separated into two phenyl rings by introducing an ester bond in the core of the well known … Expand. Save. Alert. On the existence of two ferrielectric phases in antiferroelectric liquid crystals. WebMar 2, 2024 · The dynamic evolution of chiral smectic superstructures leads to the reversible rotation of oily streaks (OSs), and even structural transformation between OSs …

Synthesis and characterization of chiral smectic side-chain …

WebApr 14, 2024 · Supramolecular chiral emergence from achiral molecules is studied with amphiphilic polypeptides upon forming molecular assemblies of nanosheets and vesicles in water. A newly designed amphiphilic ... WebApr 16, 2024 · The chiral ferroelectric smectic C (SmC*) phase, characterized by a helical superstructure, has been well exploited in developing high-resolution microdisplays that have been effectively employed in the fabrication of a wide varieties of portable devices. Although, an overwhelming number of optically active (chiral) liquid crystals (LCs ... shantharam ekhande

Illustrations of homeotropic and planar alignment in the

WebDec 15, 2024 · The directrons in chiral nematics behave similar to a wave-particle dualism in so far that they either pass through each other without losing identity (solitary wave) ... However, recently, it was shown that particle-like dynamic dissipative solitons can be formed in LCs of the fluid smectic A phase . A smectic A phase is characterized by the ... WebFeb 22, 2024 · Ethanol flowing through a chiral smectic-C* film can produce roughly circular patterns, but under different conditions also spiral patterns. Further experiments … WebFeb 22, 2024 · When particles are made to flow through a chiral liquid crystal phase, they can induce flows in the liquid crystal and as well as a rotation of the director. This paper describes experiments with a flux of ethanol through a chiral smectic-C* film, and gives an interpretation of the results in the context of the Leslie theory. pond cypress species

Textures in a chiral smectic liquid-crystal film - ResearchGate

Spontaneous Formation of Macroscopic Chiral Domains in a Fluid …

WebNov 1, 2024 · Our objective is the immobilization of polarized structure in a chiral ordered smectic phase to exhibit an enhanced CPV effect. In this study, we use a chiral phenylterthiophene derivative (S)-1 (Fig. 2) exhibiting the ferroelectric SmC* and chiral ordered smectic phases as a model compound.The electrically polarized structure in the … WebAbstract Phase sequence of a chiral smectic liquid crystal, MHPOPB, in which the biphenyl group is separated into two phenyl rings by introducing an ester bond in the core of the … shantharam drWebJan 15, 2024 · The splay-bend nematic phase is achiral, by contrast, in the N TB phase the director forms a conical left- or right-handed helix. The N TB phase provided the first example of spontaneous chiral ... pond deaths

"WebIn smectic C systems, doping with chiral mesogens induces the formation of domains with permanent electric dipole moment, which exhibit piezoelectric properties. Orientation of the mesogen in a uniaxial mechanical field and subsequent cross-linking produce a centrosymmetric morphology, where the piezoelectric effects are averaged out on a ... " - Chiral smectic

Chiral smectic

Dirac Points in Chiral Liquid Crystals - ResearchGate

WebChirality in molecules devoid of chiral centers occurs in both natural and synthetic substances, which have enormous importance as ligands in asymmetric catalysis, and some exhibit biological activity (e.g., the antifertility agent gossypol, Figure 22.2).Molecules belonging to this class of stereoisomers include biphenyls, allenes, spiranes, helicenes, … WebMar 26, 2024 · A smectic single domain (SSD) liquid crystal mode shows some unique electro-optic dynamic behaviors, including in-plane-only retardation switching [].Some empirical research works on a Smectic Single Domain-Liquid Crystal (SSD-LC) drive mode have revealed both clear phenomena and unclear phenomena in terms of racial …

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WebSelect search scope, currently: articles+ all catalog, articles, website, & more in one search; catalog books, media & more in the Stanford Libraries' collections; articles+ journal articles & other e-resources WebSep 20, 2024 · A special form of the smectic phases are the chiral smectic phases composed of chiral molecules forming a helical superstructure. A systematic study of such materials is still highly desired, since the chiral …

WebApr 10, 2024 · ABSTRACT. In this article, we report on the synthesis of chiral bimesogens that possess silyloxy central linking groups. On first examination of the mesomorphic properties of the materials by X-ray diffraction and electrical field studies we came to the conclusion that the materials exhibit ferroelectric and antiferroelectric smectic C* phase … WebJul 24, 2009 · First, saddle splay deformation of a tilted chiral smectic is itself inherently chiral, as expressed by the p·L·c coupling leading to Eq. 1, meaning that of the B2 …

WebJul 20, 2016 · chiral: [adjective] of or relating to a molecule that is not superimposable on its mirror image. WebDec 24, 2002 · Due to the unique micrometer length scale of viruses, the smectic ordering of virus particles could be easily visualized using conventional microscopy techniques …

WebAbstract. In a brief history of the discovery of antiferroelectricity in liquid crystals, the important role played by tristable switching, i.e. an electric field induced phase transition from antiferroelectric SC A * to ferroelectric SC*, has been emphasised and the antiferroelectric herringbone structure of SC A * has been presented.

WebMar 3, 2015 · A detailed study confirms an indistinguishable behavior of all ten mesogens exhibiting an enantiotropic chiral smectic C (SmC*) phase besides blue phase (BP) and chiral nematic (N*) phase. The SmC* phase occurring over a 50–70 °C thermal width shows ferroelectric switching with spontaneous polarization ( P s ) value crossing over 100 … shantharam shenoy attraWebJan 1, 2024 · While using the star-shaped bent core and chiral rod like compounds in mixture, the paraelectric smectic A, ferroelectric smectic C* and orthogonal hexatic smectic B phases were preferred. shantha rathri thirurathriWebThis article deals with modeling and analysis of chiral smectic C liquid crystals and their ferroelectric phases. The polarization field plays an important role in the problem. The total energy of the smectic C* contains the Oseen-Frank free energy of the nematic,... shantharam shettyWebPublished 1 August 1985. Physics. Journal De Physique Lettres. A new electromechanical effect has been found in planar oriented S c liquid crystals under the influence of an … pond dealsWebChirality has been reported to play an important role in controlling and mediating the self-assembly of gels. There have been a few reports on molecular chirality–regulated tuning … pond deicer locallyWebSep 23, 2016 · A novel series of siloxane-based chiral smectic side-chain liquid crystalline elastomers containing nematic and chiral mesogens were fabricated through synthesis involving a one-step hydrosilication reaction … shantha raoWebApr 1, 1979 · Attachment of a chloro group to the chiral centre promotes the chiral smectic C* mesomorphism. The induced po and Ps values are correlated to the structural features of each chiral tail. shantha ready alonso