Search academic texts

Information × Registration Number 0222U000767, 0117U002290 , R & D reports Title Thermodynamic properties of nano-structuring systems, composites, molecular solids in extreme conditions of low temperatures. popup.stage_title Head Konstantynov Viacheslav O., Доктор фізико-математичних наук Registration Date 18-01-2022 Organization B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine popup.description2  For the first time, the kinetics and dynamics of sorption and desorption of hydrogen by mesoporous material MSM-41, silicon oxide airgel, carbon nanostructures treated with cold plasma were studied in a wide temperature range, and the main mechanisms to increase sorption capacity were identified. A new anomalous mechanism of heat transfer of thermoactivation type was identified and investigated on the example of molecular crystals formed by flexible molecules, and a universal representation of low-temperature thermal conductivity in normalized coordinates was proposed. The information obtained will help explain the new physical phenomena observed in complex molecular crystals. The influence of defects and sizes of multiwall carbon nanotubes (BWNT) on their specific heat capacity CP(T) was investigated by the method of thermal relaxation. With increasing outer diameter and the number of walls in BWNT CP (T) monotonically decreases and approaches the heat capacity of graphite at low temperatures. Phenomena can be used in the development of BWNT-based products. For the first time, neutral nanoscale N4 complexes were generated in solid nitrogen irradiated with an electron beam. The new method of nonstationary desorption was proposed to the study of electronically stimulated emission of particles from irradiated materials. The obtained results are a significant step in solving the problem of creating a promising material of the future with ultra-high energy density - polymer nitrogen. The effect of explosive emission of particles from the surface of solid methane under the action of electron beam irradiation was discovered for the first time. Finding out the mechanism of this phenomenon is important to solve the urgent problem of creating effective neutron moderators. Product Description popup.authors popup.nrat_date 2022-03-09 Close