Development of technology for obtaining thin films of semiconductor compounds and metal alloys, short-range study in amorphous materials, study of the kinetics of phase transitions in condensates and their physical properties.

1. Mykolaychuk O.G. Phase relation in the Ag8SnS6-Ag2SnS -AgBr  system and crystal structure of  Ag6SnS4Br2 ./ O.G. Mykplaychuk, P.Yu. Demchenko, L.G. Akselrud and R.E. Gladyshevskii // Inorganic Materials – 2010.-Vol.46, N6.-P.590-597.
2. Mykolaychuk O.G. Electrical conductivity of  Ag8SnS6-Ag2SnS3-AgBr alloys / O.G. Mykplaychuk, P.Yu. Demchenko, L.G. Akselrud and R.E. Gladyshevskii // Inorganic Materials – 2010.-Vol.46, N7.-P.707-710.
3. Moroz M.V. Phase relation along the Ag8GeS6–[(AgBr)4GeS2] cross-section. Crystal structure and electric conductivity of Ag6GeS4Br2 in bulk / Mykola V. Moroz, Pavlo Yu. Demchenko, Lev G. Akselrud, Oleksij G. Mykolaychuk // Chemistry of metals and alloys.–2010.–N3.–P.161–168.
4. Moroz M. V. Synthesis and Electrical Conductivity of Crystalline and Glassy Alloys in the Ag3GeS3Br–GeS2 System / M. V. Moroz, P. Yu. Demchenko, O. G. Mykolaychuk, L. G. Akselrud, R. E. Gladyshevskii.  // Inorganic Materials. – Vol. 49, No. 9. – 2013. – P. 867–871.
5. Prysyаzhnyuk V. Influence of ageing processes on the structure and physical properties of amorphous-crystalline films of Gd–Fe system / V. Prysyazhnyuk, O. Mykolaychuk / Functional Materials. – 2013. – 20, № 1. – P. 64–67.
6. Moroz M.V. Thermodynamic Properties of Intermediate Phases of the Ag-Bi-Se System in the Temperature Range 535–578 K / M. V. Moroz, O. G. Mykolaychuk, M. V. Prohorenko, V. M. Moroz. // Фізика і хімія твердого тіла. – Vol. 15, № 2. – 2014. – Р. 272–276.
7. Moroz V. Ag3GeS5Br: Syntheses, structure and ionic conductivity / M.Moroz, P.Demchenko, V.Romaka, R.Serhiz, L.Akselerud, R.Gladyshevskii, O.Mykolaychuk // Chemistry of Metals and Alloys. – 2014. –Vol.7, –Is.3/4 –P. 139-148.
8. Romanyuk R. R. Structure of amorphous (GeS)_1-xBi_х thin films (0£х£0.15) / R. R. Romanyuk, O.G. Mykolaychuk // Optoelectronics and Advanced Materials: Rapid Communications. – 2014. – V. 8, № 5-6. – Р. 647–651.

Born on April 15, 1931, in the village of Synitsya, Khrystynivskyi district, Cherkasy region.

He graduated from the Faculty of Physics of Lviv University (1958). In 1958–1959  was a laboratory assistant at the Department of Experimental Physics, 1959–1961 – a senior laboratory assistant at the Department of Solid State Physics, 1961–19630 – a senior engineer of Research Laboratory on the problems of crystals growth and research  physical properties, 1963–1966 – assistant, candidate of Physical and Mathematical Sciences (Structure and Some Physical Properties of Mercury Sulphur in Thin Films, 1965), 1966–1988 – Associate Professor, 1988–1996 – Head of the Department of X-Ray Metlophysics, 1996-1998 – Professor of the X-Ray Metallophysics Department, since 1998 Professor of the Department of Physics of Metals, 1973–1978 – Deputy Dean of Physics Faculty of Lviv university.

He is the author of more than 550 science works and 30 patents and copyright certificates, the supervisor of 25 candidate dissertations.

Member of the “Physical research journal” editorial board (1997–2007). Soros Professor (1997).