Spherulite phase induction from positive Gaussian curvature in lyotropic lamellar liquid crystals
نویسندگان
چکیده
منابع مشابه
Spherulite phase induction from positive Gaussian curvature in lyotropic lamellar liquid crystals
The equilibrium properties of spherulite assemblies in lyotropic lamellar phases are studied within both elastic and statistical models. Following previous models, the spherulites are assumed to be stabilized by their positive Gaussian curvature. Our model predicts that the spherulites should adopt a regular crystalline piling if their core energy E~ is much larger than k~ T, or a liquid-like p...
متن کاملAnomalous phase sequences in lyotropic liquid crystals.
We present a coarse-grained model in order to describe the unusual sequence of mesophases observed in aqueous solutions of nonionic lipids, such as monoolein. The lipid molecules are modeled as a rigid head and a flexible Gaussian tail, and water is treated explicitly. A key component of the model is thermally reversible hydrogen bonding between the lipid head and water resulting in changes in ...
متن کاملCdS MINERALIZATION OF HEXAGONAL, LAMELLAR, AND CUBIC LYOTROPIC LIQUID CRYSTALS
Growth of CdS was studied in three different liquid crystalline phases demonstrating the versatility of liquid crystal templating of inorganic solids. Semiconductor growth in a hexagonal liquid crystal yielded a nanostructure with hexagonal symmetry, a lamellar liquid crystal yielded a lamellar nanostructure, and a cubic liquid crystal (consisting of spherical micelles) yielded a hollow, spheri...
متن کاملTunable Filters from Lyotropic Liquid Crystals
The external field influence on the birefringence of the liquid crystalline layer is expressed by using the Cauchy dispersion equation. The basically theoretical elements of the polarization interferential filters of Lyot Ohmann and Wood type, achieved in a multilayer geometry, are given in this paper. The expressions corresponding to the transmitted maxima and to the spectral bandwidths of the...
متن کاملPhase transitions in lyotropic colloidal and polymer liquid crystals
An overview is given of theory and experiments on liquid crystal phases which appear in solutions of elongated colloidal particles or stiff polymers. The Onsager (1949) virial theory for the isotropic-nematic transition of thin rodlike particles is treated comprehensively along with extensions to polydisperse solutions and soft interactions. Computer simulations of liquid crystal phases in hard...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal de Physique II
سال: 1994
ISSN: 1155-4312,1286-4870
DOI: 10.1051/jp2:1994178