Results of research in the area of nanotechnologies and nanomaterials. Part 3Journal: Nanotechnologies in Construction: A Scientific Internet-Journal (Vol.6, No. 3)
Publication Date: 2014-06-20
Authors : KARPOV Alexey Ivanovich;
Page : 64-75
Keywords : nanosystem; nanostructure; nanoparticles; nanotechnologies;
To popularize scientific achievements in construction the main results of Russian and foreign scientists’ research are published in the form of abstract. The research ?Stability of magnetic states of metal nanosystems? has developed multivariable theory of transition state for magnetic systems. The expression for the coefficient of magnetic transition rate in systems with arbitrary degrees of freedom was obtained. The algorithms to find the way with the minimal energy gap in multidimensional configuration space, localization of saddle points in multidimensional energy zone and to calculate magnetic states life spans have been developed. According to non-collinear generalization of Aleksander-Andersen model ?magnetic theorem on forces? was proved. Using this theorem analytical expressions for energy gradient at arbitrary point of configuration space were deduced, that provided qualitative decrease of self-matched computation time. In the research ?Rectification of nano- and microparticles in rotating spiral frames when analyzing polydispersed samples? method of flowing rectification of particles in transverse field of centrifugal forces, in planetary centrifuges equipped with rotating frames (RF) was developed. The application of the method was broaden: the opportunity to divide submicroscopic particles by changing geometry of frame drum without increasing rotation speed was demonstrated. The use of cylindric RF with symmetrical flange made it possible to increase efficiency of rectification and extract practically monodisperse fractions of particles from their mixture. For the first time flowing rectification in transverse magnetic field was used to extract weight fractions of the particles which sizes are 50?300 nm, 300?1000 nm, 1?10 μm and 10?100 μm from dust samples for further analysis.
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Last modified: 2014-07-04 03:53:51