National Tetchnical University of Ukraine Igor Sikorsky Kyiv Politechnic Institute International office Faculty of Physics and Mathematics

Національний технічний університет України Київський політехнічний інститут ім. Ігоря Сікорського. Міжнародний офіс Фізико-математичного факультету

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International co-operation with scientific institutions

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Los Alamos National Laboratory (LANL).
http://www.lanl.gov/

In recent years, Physics and Mathematics implements collaborations with Los Alamosskoyu National Laboratory (LANL). This lab was established in 1943 for the Manhattan Project to create nuclear weapons. 

Now LANL conducted basic research in many areas of physics involving scientists from different countries.

A series of works made for direct participation by representatives of "KPI" by professor V. Gorshkov, ended publication of the book "Magnetic resonance and microscope and a single spin measurement", World Scientific, 2006. It is dedicated registration technique in solid individual electron spins, which gives a unique tool for research in physics, chemistry, biology and medicine. 

Distribution initially coherent laser beam in turbulent atmosphere. Sample numerical simulation that demonstrates and fragmentation, and the wandering of the beam (wandering).

Productive cooperation is "KPI" and LANL in the field of optical communications made using a laser beam (Prof. V. Gorshkov, S. Torous graduate student). How will this kind of inherent high sociability, privacy and high density of information transferred. A significant factor that hinders the implementation of key technical solutions, is the atmosphere, which in almost any weather conditions are turbulent. Even small spatial variations of refractive index lead to distortion of the laser beam. In the process of spreading a bunch fragmantation (divided into separate beams) and deviates from the original direction. The level of received signal is random, which increases the likelihood of errors while decoding information. A study conducted at the Physics Department of Mathematics, devoted to the development of methods of suppression of fluctuations of the signal detector. 

Widespread use of mathematical modeling in the study of propagation in turbulent atmosphere, the so-called partially coherent beams (including optical vortices), allowed to achieve a reduction of fluctuations in the signal 20 times. This figure is a record in the world today. The results of joint work published in the JOURNAL OF PHYSICS B: ATOMIC, MOLECULAR AND OPTICAL PHYSICS (2009), highly appreciated at the annual conference Photonics West-San Francisco-2009 and included in the list of the highest achievements of LANL in 2009.

At the stage of consolidation is an agreement on cooperation for the next three years - 

Memorandum of Understanding Between Los Alamos National Laboratory and National Technical University of Ukraine "KPI".

Assume joint work in the field

Theory and modeling of propagation of light through the turbulent atmosphere;

Theory and modeling of sensors and imagers;

Modeling the dynamics of quantum systems interacting with the environment;

Modeling of electromagnetic radiation scattering and absorption by NSS;

Study of surface-enhanced Raman scattering (SERS) and fluorescence of molecules adsorbed on the NSS interfaces and on micro-resonators;

Modeling of controlled growth of nano-particles.
House (Los Alamos, USA), inhabited opener neutrino D. Chadwick and father of plutonium chemistry Richard Baker.

Center of the leading technologies in material science (Clarkson University, NY)
http://www.clarkson.edu/camp/

Over the past three years is active cooperation, secured relevant agreements with the Center for Advanced Technologies in Materials (Clarkson University, NY).

Works devoted to nano-physics. It is known that the properties of the same substance contained in the particle size of 100-200nm, significantly different from the physical and chemical properties of micron particles (and higher) dimensions. Nanoparticles find the widest application in medicine, microelectronics, and even in agriculture Improvement. Methods of obtaining nanoparticles should provide their monodyspersnist (uniformity of size) and accountability form on which depend heavily on physical and chemical properties of particles. Often, depending on the mode of formation, the shape of particles varies with the same initial substances.

Form nanochastyts iron, obtained at work - Wang, CM, DR Baer, ​​JE Amonette, MH Engelhard, Y Qiang, and J Antony. 2007. "Morphology and oxide shell structure of iron nanoparticles grown by sputter-gas-aggregation." Nanotechnology 18:255603 

That is the theory of shape of nanoparticles during the growth of physicists dedicated to "KPI" and Clarkson University. It was shown that the correct form of nanoparticles in the form of polyhedrons is often the result of substantial non-equilibrium diffusion of growth modes, which can be controlled by changing the temperature and the concentration of free atoms (molecules) in it.

Theoretical recommendations confirmed by real experiments. One of the last publications (2009): http://pubs.acs.org/action/doSearch?action=search&searchText=Shape+Selection+in+diffusive. Numerical simulations by using a unique algorithm (V. Gorshkov, A. Zavalov), which allows quite accurately describe the dynamics of systems with several millions of free atoms (molecules) and the dynamics of surface atoms (molecules) nanoparticles that grow. 

Regularities in the formation mechanisms of nanoparticles attracted considerable interest in the circle of specialists, and the article was the subject of attention at many sites, from site space agency NASA and ending with medical sites.


Center for Quantum Device Technology  (Clarkson University, NY)
http://www.clarkson.edu/cqdt/

Last Updated on Monday, 24 March 2014 11:16