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Information × Registration Number 0214U006245, 0110U006261 , R & D reports Title Studying of optical properties of nanomaterials on the base of liquid-crystal media with carbon nanotubes and other nanoparticles by the methods of singular optics for assignment and investigation of mechanisms of their interaction with electromagnetic radiation including optical vortices generation, preparation of the methods of nanomaterials complex diagnostics and certification, establishment of time variations of their characteristics. popup.stage_title Head Soskin M.S., Registration Date 25-02-2014 Organization Institute of physics NASU popup.description2 We research the microstructure and electrical behavior of suspensions NTs, dispersed in binary mixtures of COC (good solvent) 5 CB (bad solvent). COC concentration in the mixtures was varied in the range of X = 0.0-1.0, the samples were put in an electric field between two electrodes, the distance between which fluctuated between 50-250 ?m, and the maximum electric field intensity reached 1.5.106 V/m. It is shown that long influence of electric field increased leads to increasing of NT agregates distribution order and formation of chains extending along the applied field. Composites are oriented by an external electric field may be stored in an oriented state for a long time, however, putting system into an isotropic state leads to a partial destruction of circuits. The stronger destruction of chains was observed after application of the mechanical displacement to a sample. The behavior of the electrical conductivity from the LC composition of the matrix and its time evolution is studied. The influence of the distance between the electrodes on the changes in the microstructure of the composites with the application of electric field is studied. The main results are: the definition of time stability of dispersions of carbon nanotubes in a cholesteric liquid crystal by determining optical (optical transmission) and electrical (conductivity) characteristics; finding the optimized composition of nanomaterials based on carbon nanotubes and cholesteric liquid crystals that provide high time stability under the reasonable values of voltage for the implementation of the Fredericks transition in the liquid crystal cell; finding mesophase stabilization effects due to increased translational ordering in the liquid crystal system; confirmation practical lack of influence of dispersed single- and multiwalled carbon nanotubes on the selective reflection of light; demonstration that nematic-cholesteric mixtures are perspective for creation of nanomaterials on their basis with high time stability and satisfactory functional characteristics. Product Description popup.authors Васильєв Василь Ігоревич Поневчинський Владіслав Вікторович Соскін Марат Самуїлович popup.nrat_date 2020-04-02 Close