1. National Technical University of Ukraine, "Igor Sikorsky Kyiv Polytechnic Institute",Institute of Telecommunication Systems,Kyiv,Ukraine
2. V. I. Vernadsky Institute of General and Inorganic Chemistry of Ukrainian NAS,Department of Solid State Chemistry,Kyiv,Ukraine
3. National Technical University of Ukraine, "Igor Sikorsky Kyiv Polytechnic Institute",Institute of Physics and Technology,Kyiv,Ukraine