Academician Jordan Malinovski was born on 03.06.1923 ...
Acad. J. Malinovski (1923 - 1996)
Academician Jordan Malinovski was born on 03.06.1923 in Sliven, Bulgaria. He studied in the American college in Sofia and after graduation in 1943, he took part in the World War II and was awarded a medal. In 1948 he graduated the Faculty of mathematics and physics with specialty “Chemistry” in Sofia State University “Kl. Ohridski” and worked as a research associate in the field of physical chemistry. From 1948 up to 1958 he was a research associate in the Institute of Physics to the Bulgarian Academy of Sciences (BAS). He got his PhD degree in chemistry in 1958 and his Doctor of Science degree in 1969. In 1959 he was elected for an associated professor, and in 1964 – for professor in the Institute of physical chemistry to BAS. In 1989 he was elected for an academician of BAS. He was a founder of the Central laboratory of photoprocesses to BAS (1967) being its director up to 1992, when it was elected for the President of BAS. He remained on this high position till the end of his life in 1996.
Academician Jordan Malinovski began his scientific activity in the field of electro-crystallization under the guidance of academician Rostislav Kaishev. As a research associate in the Institute of Physics to BAS, he obtained substantial results on physical formation of photo-emulsions. He developed a method for differential development which permitted creation of photo-materials with new improved characteristics and which had been applied by many photographic firms. A special place in his scientific activity took simulations of the mechanism of the elementary photo-process for mono-crystals of silver bromide. For this purpose a method was developed for direct synthesis of mono-crystals from super-pure silver halides, which is still widely used all over the world for synthesis of compounds of high purity that are sensitive to light and other radiations.
Further in his career, the interests of academician Jordan Malinovski were focused on study of formation of the “latent image” - an invisible image, formed at illumination of the photo-sensitive material, which is visualized by means of physical and chemical development. The obtained unique results proved the important role of the so called photo-holes in the photoinduced changes in silver halides. These results were in the base of a new theory, which became wellknown in the international scientific literature as a “symmetric scheme of Malinovski”. It takes in account both electrons and photo-holes. It has been established by modeling that one of the rather complicated and unclear processes – action of the developer which distinguishes the exposed from the non-exposed parts of the photo-material – is a special case of the theory of crystal growth. The systematic research made possible clarification of the photographic process also in others photo-sensitive materials, including non-silver compounds. Advanced technologies for photomaterials production have been developed on the basis of highly effective completely dry approach for deposition of silver and non-silver light-sensitive substances by evaporation in vacuum. Practical implementation of the pioneer achievements of academician Jordan Malinovski made possible organization of a new for Bulgaria high-tech field – production of photo-raster transducers.
Academician Jordan Malinovski was widely recognized all over the world. He was an honorable member of the Royal society of the United Kingdom, of American and Japanese societies for photographic science and technique, of European academy of sciences, art and literature, of Academy of Valonia in Belgium etc. He was awarded numerious national and international awards as the medal of the German academy for natural sciences, Lieven-Gevaert Medal – the most prestigious award of American society for photographic science and technique, award for the best paper of the year of the American journal for photographic science and technique (2 times); Dimitrov award; decorations “Republic Bulgaria” – ІІІ degree, “Cyrill and Methodius” – ІІ degree, medal “1300 anniversary of Bulgaria”, medal “100 years BAS” etc. Many years he was a member of the International committee for photographic science and editor in prestigious international journals. As an outstanding scientist he was invited to deliver keynote lectures at all international conferences in the field of photographic processes.
As a president of BAS academician Jordan Malinovski fruitfully worked for reforming the Academy. He made a lot of efforts to keep the leading position of BAS in the scientific community of Bulgaria and Bulgarian society. Doctor's thesis of Acad. J. Malinovski (in Bulgarian, .pdf)
The Institute of Optical Materials and Technologies (IOMT) “Academician Jordan Malinovski” has been established on July 1, 2010 by merging two research units: The Central Laboratory of Photo-processes and The Central Laboratory of Optical Recording and Processing of Information.
The main research goals of the institute are: ⁕ Investigation of photo-induced processes in micro- and nano-sized layers and structures and to develop high-technology novel materials and methods for optical applications in flexible transparent electronics, ecology, biomedicine, food industry, non-destructive testing and cultural heritage protection; ⁕ Training of highly qualified personnel in these areas. Training of graduates and postgraduates; ⁕ Carrying out interdisciplinary research and joint projects with experts from other research units; ⁕ Implementation of the scientific product through innovation and knowledge transfer to industry.
Optical detection of vapours using one-dimensional photonic crystals, project coordinator assoc. prof Dr. Tsvetanka Babeva. One dimensional photonic crystals consisting of alternating layers of sol-gel ...
Optical detection of vapours using one-dimensional photonic crystals
Optical detection of vapours using one-dimensional photonic crystals, project coordinator assoc. prof Dr. Tsvetanka Babeva. One dimensional photonic crystals consisting of alternating layers of sol-gel Nb2O5 and spin-coated nanozeolite films were modelled theoretically and realized experimentally. The studied structures were used successfully as indicators for acetone with transmittance change of 60 to 75 % higher as compared to the case of methanol, ethanol and water vapours. The studied indicators have fast response (the time constant for adsorption is 6 sec), work at room temperature and recover their initial state without additional heating. The results are published in T. Babeva, H. Awala, M.Vasileva, J. El Fallah, K. Lazarova, Sebastien Thomas and S. Mintova, Dalton Transaction., 43, 8868-8876, (2014) and K. Lazarova. H. Awala, S.Thomas, M. Vasileva, S. Mintova and T. Babeva, Sensors, 14, 12207-12218, (2014) and are obtained in collaboration with Prof. Mintova from LCS-Caen, CNRS, France. ◊
Organic-inorganic hybrid structures and 2D materials for optics and photonics applications, Vera Marinova. All-optically controlled hybrid structures, combining of a photorefractive crystal and polymer dispersed liquid crystals are developed...
Organic-inorganic hybrid structures and 2D materials for optics and photonics applications
Organic-inorganic hybrid structures and 2D materials for optics and photonics applications, Vera Marinova. All-optically controlled hybrid structures, combining of a photorefractive crystal (Bi12SiO20:Ru) and polymer dispersed liquid crystals (PDLC) are developed. In devices of this type the driving force of the reorientation of the liquid crystal molecules and refractive indices modulation is the internal space charges field, due to the photorefractive properties of inorganic crystal. The space charge field phenomenon allow all non-linear optical processes to be controlled by light irradiation, without a necessity of applying an external electric field as well as conducting coatings. Besides, by replacement of the conventional liquid crystals with PDLC, since there are no needs of preliminary orientation of the liquid crystal molecules neither use of polarizers, the structures become less expensive and easy of fabrication. The proposed device works at transmission mode, in a wide spectral range (0.4-1.3µm) and sub-micron resolution, thus opens possibility for application in display technology and real-time visualization of biological images. Vera Marinova, Shiuan Huei Lin, Yi-Hsin Lin and Ken Yuh Hsu "Polymer dispersed liquid crystal light valve based on photorefractive material substrate” (Taiwan, Japan, USA)-patent application Opt. Lett., v. 39 (11), 3320-3324 (2014) by Ren Chung Liu, Vera Marinova, Shiuan Huei Lin, Ming Syuan Chen, Yi Hsin Lin and Ken Yuh Hsu. The results has been achieved through PPP collaboration project between IOMT and NCTU, Taiwan under the contact NSC103-2911-I-009-516, supported by BAS and MOST, Taiwan. ◊