Liquid crystal media

N.m.r. studies of liquid crystal media showed that phenyl sulphonate counter ions induced abrupt changes in the dipolar coupling of methy1phosphonate. 61... 

S. Tazuke, S. Kurihara, and T. Ikeda, Amplified image recording in liquid crystal media by means of photochemically triggered phase transition, Chem. Lett. 1987, 911-914. 

Field et al.62 developed a general procedure to estimate the Saupe order parameters for spin systems aligned in liquid crystal media by iteratively fitting the experimental and simulated spectral widths of the high-order multiple quantum spectra. 

Theoretical work on dislocations in smectic liquid crystals was first done by de Gennes Q) followed by Pershan (2). For an incompressible smectic A liquid crystal in the hnear hydrodynamic approximation, the elastic strain can be described in terms of a single variable w(x,y,z) Aat specifies local displacements of the smectic layers. The stress-strain field was derived for an isolated dislocation in an unbounded liquid crystal media and extended their results to bounded media using the concept of an "image dislocation." The solution is valid for a thick wedge (relative to a characteristic length of the dislocation) of small angle. However, the... 

To understand this new class of materials requires an interdisciplinary approach free-radical photopolymerization chemistry, low-molar-mass liquid crystals physics, materials science of thermosets and display technology. This short review will touch on aspects of understanding of the morphology of these polymer networks formed in liquid crystal media. 

Y. Wang, Q. Li, Light-driven chiral molecular switches or motors in liquid crystal media. Adv. Mater. 24, 1926-1945 (2012)... 

E. M. Barrall II, J. F. Johnson, A review of the status of polymerization in thermotropic liquid crystal media and liquid crystalline media,/. Macromol. Sci. Rev. Macromol. Chem. Cl7, 137 (1979). 

Zhou, W Zhang, J. Xue, T Zhao, D. Li, H. Electrodeposition of ordered mesoporous cobalt hydroxide film from lyotropic liquid crystal media for electrochemical capacitors. J. Mater. Chem. 2008, 18, 905-910. 

While the properties of the fast dynamic mode related to intrapore orientational fluctuations of the director field are quite well understood, the origin of various slow dynamic processes is for the moment still far from being resolved. The observed characteristics of the slow mode are typically very specific for a selected system and strongly depend on the morphology and composition of the confining medium. The slow process usually exhibits a profound non-exponetial relaxation, which is attributed to the structural randomness of the material. Further studies in confined liquid crystal media with well-resolved morphological details are needed to elucidate the nature of different slow modes. 

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