M.Sc. in Physics (1981), Ph.D. (1985), Associate Professor of Chemical Physics (1991), Dr. Sci. in Physics (2001), Full Professor of Condensed Matter Physics (2002) - Sofia University, Bulgaria; Corresponding Member (2004) and Fellow (2012) of the Bulgarian Academy of Sciences. He has been visiting professor in the Illinois Institute of Technology (Chicago, USA, 1987) in the Nagayama Protein Array Project (Tsukuba, Japan, 1992); Laboratory of Ultrastructure Research, NIPS (Okazaki, Japan, 1999). His research interests are in the area of thin liquid films and surface forces, fluid interfaces, capillary forces and phenomena, phospholipid membranes, solubilization in micellar solutions, thermodynamics and kinetics of surfactant adsorption, attachment of particles to interfaces, and interactions in colloidal and bio-colloidal dispersions. So far, he has published 197 research and review papers, one book (Particles at Fluid Interfaces and Membranes, Elsevier, Amsterdam, 2001); 7500 citations of his publications have been found. Until now, he has delivered 213 presentations at scientific conferences: 3 plenary lectures, 46 invited and keynote lectures, 78 oral presentations and 89 posters. He has been supervisor of the Diploma Works of 36 M.Sc. students and of the Theses of 15 Ph.D students. He was recipient of the Prof. A. Zlatarov Prize of the Bulgarian Academy of Sciences and the Sofia University in 1990. He was awarded the "St. Kliment Ohridski" University of Sofia Blue Ribbon Medal for significant achievements in science (2006); the Annual award "Best Professor" (2007), and the highest National Award "Pythagoras" for scientific achievements (2016) of the Bulgarian Ministry of Education and Science. He was elected Secretary of the European Colloid and Interface Society (ECIS, 2010-present) and Member of the Council of the International Association of Colloid and Interface Scientists (IACIS, 2015-present). In June 2015, he was elected Dean of the Faculty of Chemistry and Pharmacy of the Sofia University.