Laboratory of Multifunctional Materials

Stefan Kolev Kolev

Associate Professor

e-mail:

kolevskk | at | abv | dot | bg

Research Interests

Solid State Computational chemistry

Theoretical Organic Photo-Chemistry: Excited State Reaction Mechanisms

Molecular Design

Quantum Metadynamics

Scientific Experience

2023 - present : Associate Profеssor, Institute of Electronics of the Bulgarian Academy of Sciences, Laboratory “Multifunctional Materials”

2017 - present : Assistant Professor, Institute of Electronics of the Bulgarian Academy of Sciences, Laboratory “Multifunctional Materials”

Education and Training

2014 : PhD in Computational Chemistry: Quantum-chemical investigation of the influence of hydrogen bonds and metal ions on RNA, Faculty of Chemistry and Pharmacy, Sofia University, Bulgaria

2007 : MSc in Organic Materials in the High Technology from Faculty of Chemistry and Pharmacy, Sofia University, Bulgaria

2006 : BSc in Organic Chemistry from Faculty of Chemistry and Pharmacy, Sofia University, Bulgaria

Projects

2023 - 2025 : "Ab initio simulations of the interaction of single carbon atoms and small hydrocarbon molecules in space" KP-06-COST/10 from 2023; Participant

2021 - 2025 : “Study of the possibilities for deposition of two- or multi- layred structures of type: graphene- buffer layer- single crystalline Si substrate”, funded by the Bulgarian National Scientific Research Fund, grant KP-06-58/2 (2021); Participant

2017 - 2021 : “Novel methods for synthesis of graphene and graphene oxide by modification of amorphous and nano-dispersed carbon phases”, funded by the Bulgarian National Scientific Research Fund, grant DN 18/9 (2017); Participant

2010 – 2014 : Other projects concerning computational chemistry funded by the Bulgarian National Scientific Research Fund.

Publications

Ab initio metadynamics study revealing multiple mechanisms of reactivity of a primal carbon cluster towards hydrogen and ammonia in space. Kalchevski, D. A.; Kolev, S. K.; Trifonov, D. V.; Grozev, I. G.; Aleksandrov, H. A.; Popov, V. N.; Milenov, T. I. Nanomaterials, 15(14): 1110. 2025.

The Study of the Synthesis of SiC by the Carbonization of Si(111) Substrates: The Role of Native Silicon Oxide. Milenov, T. I.; Mehandzhiev, V.; Rafailov, P.; Avramova, I.; Zahariev, I.; Avdeev, G.; Karashanova, D.; Georgieva, B.; Terziyska, P.; Kirilov, K.; Blagoev, B.; Kolev, S. K.; Dimov, D.; Kalchevski, D. A.; Karaivanova, D.; Popov, V. Applied Sciences, 15(13): 7078. 2025.

A Comparative Study on Synthesizing SiC via Carbonization of Si (001) and Si (111) Substrates by Chemical Vapor Deposition. Milenov, T. I.; Avramova, I.; Mehandziev, V.; Zahariev, I.; Avdeev, G.; Karashanova, D.; Georgieva, B.; Blagoev, B.; Kirilov, K.; Rafailov, P.; Kolev, S. K.; Dimov, D.; Karaivanova, D.; Kalchevski, D. A.; Trifonov, D.; Grozev, I.; Popov, V. Materials, 18(14): 3239. 2025.

A Complete Energy Model for Graphene Flake Growth with the Fewest Possible Dangling Bonds. Grozev, I. G.; Kalchevski, D. A.; Trifonov, D. V.; Kolev, S. K.; Aleksandrov, H. A.; Popov, V. N.; Milenov, T. I. Nanomaterials, 15(10): 723. 2025.

Ab Initio MD Study of the Mechanism of Carbonization of Si(001) Surfaces with Methane at High Temperatures. Kalchevski, D. A.; Trifonov, D. V.; Kolev, S. K.; Aleksandrov, H. A.; Dimov, D. A.; Popov, V. N.; Milenov, T. I. Coatings, 27(4): 427. 2025.

Theoretical study on the mechanisms of formation of primal carbon clusters and nanoparticles in space. Kalchevski, D. A.; Trifonov, D. V.; Kolev, S. K.; Popov, V. N.; Aleksandrov, H. A.; Milenov, T. I. Physical Chemistry Chemical Physics, 27(4): 1819 - 1833. 2025.

Some initial results on the reactivity of a primal carbon cluster towards ammonia in space. Kalchevski, D. A.; Trifonov, D.; Kolev, S. K.; Popov, V.; Aleksandrov, H.; Dimov, D. A.; Milenov, T. I. Journal of Physics: Conference Series, 2994: 012020. 2025.

Some initial results on modification of aC:H films by UV-C irradiation. Some initial results on modification of aC:H films by UV-C irradiation. Milenov, T. I.; Karaivanova, D.; Stankova, N.; Dimov, D.; Trifonov, D.; Kalchevski, D. A.; Kolev, S. K.; Kirilov, K.; Valcheva, E. Journal of Physics: Conference Series, 2994: 012027. 2025.

A Theoretical Examination of Various Complexes of a Proposed Novel Chemosensor Material—Graphene/SiC. Kalchevski, D. A.; Kolev, S. K.; Dimov, D. A.; Trifonov, D.; Avramova, I.; Ivanova, P.; Milenov, T. I. Chemosensors, 12(11): 239. October 2024.

Ab initio study of the mechanism of carbonization of {111} Si-substrate at high temperature. Kalchevski, D A; Trifonov, D V; Kolev, S K; Aleksandrov, H A; Milenov, T I; Materials Chemistry and Physics, : 129180. 2024.

DFT simulation of the Raman spectrum of single layer graphene. Kolev, S K; Trifonov, D V; Aleksandrov, H A; Atanasov, V A; Popov, V N; Milenov, T I; Journal of Physics: Conference Series, 2487: 012003. 2023.

Modification of carbon black by laser irradiation. Milenov, T; Dimov, D; Kostadinov, I; Avdeev, G; Russev, S; Genkov, K; Trifonov, D; Zyapkov, A; Ivanov, K; Kolev, S; others; Journal of Physics: Conference Series, 2487: 012006. 2023.

Study of the Chemical Vapor Deposition of Nano-Sized Carbon Phases on {001} Silicon. Milenov, T; Trifonov, D; Kalchevski, D A; Kolev, S; Avramova, I; Russev, S; Genkov, K; Avdeev, G; Dimov, D; Karaivanova, D M; others; Materials, 16: 7190. 2023.

Modification of micro-crystalline graphite and carbon black by acetone, toluene, and phenol. Milenov, T I; Dimov, D A; Avramova, I A; Kolev, S K; Trifonov, D V; Avdeev, G V; Karashanova, D B; Georgieva, B C; Ivanov, K V; Valcheva, E P; The Journal of Chemical Physics, 158: . 2023.

Dissolution behavior and varied mesoporosity of zeolites by NH4F etching. Qin, Z; You, Z; Bozhilov, K N; Kolev, S K; Yang, W; Shen, Y; Jin, X; Gilson, J-Pierre; Mintova, S; Vayssilov, G N; others; Chemistry--A European Journal, 28: e202104339. 2022.

Structure and phase composition study of thin TiO2: C films deposited by rf magnetron sputtering. Milenov, T; Karaivanova, D; Angelov, O; Terziyska, P; Avdeev, G; Karashanova, D; Georgieva, B; Genkov, K; Dimov, D; Ivanov, K; others; Journal of Physics: Conference Series, 2240: 012009. 2022.

Sodium and Magnesium Ion Location at the Backbone and at the Nucleobase of RNA: Ab Initio Molecular Dynamics in Water Solution. Kolev, S K; St. Petkov, P; Milenov, T I; Vayssilov, G N; ACS omega, 7: 23234--23244. 2022.

Inside Cover: Aluminized Enhanced Blast Explosive Based on Polysiloxane Binder (Prop., Explos., Pyrotech. 2/2022). Kolev, S K; Tsonev, T T; Propellants, Explosives, Pyrotechnics, 47: e202280202. 2022.

Surface chemistry of reduced graphene oxide: H-atom transfer reactions. Kolev, S K; Aleksandrov, H A; Atanasov, V A; Popov, V N; Milenov, T I; Applied Surface Science, 567: 150815. 2021.

Modification of graphene-like, hydrogenated amorphous, hydrogenated tetrahedral amorphous carbon and amorphous carbon thin films by UV-C light. Milenov, T I; Avramova, I A; Dikovska, A; Karaivanova, D; Terziyska, P; Kolev, S K; Karashanova, D; Georgieva, B; Dimov, D; Atanasov, V; others; Surfaces and Interfaces, 24: 101073. 2021.

Nd: YAG laser ablation of micro-crystalline graphite in a water suspension. Milenov, T; Dimov, D; Nikolov, A; Stankova, N; Avramova, I; Avdeev, G; Russev, S; Karashanova, D; Georgieva, B; Kostadinov, I; others; Journal of Physics: Conference Series, 1859: 012006. 2021.

Modification of thin carbon films by UVc light. Milenov, T; Dikovska, A; Avramova, I; Karaivanova, D; Avdeev, G; Terziyska, P; Dimov, D; Karashanova, D; Georgieva, B; Kolev, S; others; Journal of Physics: Conference Series, 1859: 012008. 2021.

Novel Enhanced Blast Explosives; Aluminized Enhanced Blast Explosive Based on Polysiloxane Binder. Kolev, S K; Tsonev, T T; 16th Workshop on Pyrotechnic Combustion Mechanisms; At: Webinar, : . 2021.

Modification of thin carbon films by UVC light. Milenov, T; Avramova, I; Dikovska, A; Avdeev, G; Mladenoff, J; Kolev, S; Valcheva, E; Journal of Physics: Conference Series, 1492: 012030. 2020.

Computational capacity of pyramidal neurons in the cerebral cortex. Georgiev, D D; Kolev, S K; Cohen, E; Glazebrook, J F; Brain Research, 1748: 147069. 2020.

Modification of carbon black by thermal treatment in air-atmosphere. Tzonev, L; Pishinkov, D; Avramova, I; Avdeev, G; Valcheva, E; Mladenoff, J; Genkov, K; Zyapkov, A; Russev, S; Kolev, S; others; AIP Conference Proceedings, 2075: . 2019.

Synthesis of graphene-like phases in a water colloid by laser ablation of graphite. Milenov, T; Nikolov, A; Avdeev, G; Avramova, I; Russev, S; Karashanova, D; Konstadinov, I; Georgieva, B; Mladenoff, J; Balchev, I; others; Materials Science and Engineering: B, 247: 114379. 2019.

Interaction of graphene with out-of-plane aromatic hydrocarbons. Kolev, S K; Aleksandrov, H A; Atanasov, V A; Popov, V N; Milenov, T I; The Journal of Physical Chemistry C, 123: 21448--21456. 2019.

Semiconducting graphene. Kolev, S K; Atanasov, V A; Aleksandrov, H A; Popov, V N; Milenov, T I; Bulgarian Chemical Communications, 51: 552--556. 2019.

Ablation of graphite in water by Nd: YAG laser. Balchev, I; Nikolov, A; Stankova, N; Avramova, I; Valcheva, E; Russev, S; Karashanova, D; Kostadinov, I; Mladenoff, J; Kolev, S; others; 20th International Conference and School on Quantum Electronics: Laser Physics and Applications, 11047: 85--90. 2019.

Ellipsometric study of thin carbon films deposited by pulsed laser deposition. Dikovska, A; Tzonev, L; Avramova, I; Terziiska, P; Bineva, I; Avdeev, G; Valcheva, E; Mladenoff, J; Angelov, O; Kolev, S; others; 20th International Conference and School on Quantum Electronics: Laser Physics and Applications, 11047: 136--141. 2019.

X-ray photoelectron spectroscopy characterization of amorphous and nanosized thin carbon films. Avramova, I; Dikovska, A; Valcheva, E; Terziiska, P; Mladenoff, J; Tzonev, L; Kolev, S; Milenov, T; 20th International Conference and School on Quantum Electronics: Laser Physics and Applications, 11047: 80--84. 2019.

Synthesis of submicron-dispersed carbon phases in water by Nd: YAG laser ablation of graphite. Nikolov, A; Balchev, I; Stankova, N; Avramova, I; Valcheva, E; Russev, S; Karashanova, D; Georgieva, B; Kostadinov, I; Mladenoff, J; others; 20th International Conference and School on Quantum Electronics: Laser Physics and Applications, 11047: 119--124. 2019.

Pulsed laser deposition of thin carbon films on SiO2/Si substrates. Milenov, T; Dikovska, A; Avdeev, G; Avramova, I; Kirilov, K; Karashanova, D; Terziyska, P; Georgieva, B; Arnaudov, B; Kolev, S; others; Applied Surface Science, 480: 323--329. 2019.

Study of the initial stages of deposition of graphene-like films by sublimation of amorphous carbon. Mladenoff, J; Tzonev, L; Kirilov, K; Avramova, I; Avdeev, G; Valcheva, E; Russev, S; Arnaudov, B; Terziiska, P; Kolev, S; others; AIP Conference Proceedings, 2075: . 2019.

Solid state fuel-air explosives. Kolev, S; Tsonev, T; Weinheimer, R; 43rd IPSUSA Seminar, Fort Collins, CO, 8-13 July 2018 At: Fort Collins, CO, : . 2018.

Interaction of Na+, K+, Mg2+ and Ca2+ counter cations with RNA. Kolev, S K; Petkov, S, P; Rangelov, M A; Trifonov, D V; Milenov, T I; Vayssilov, G N; Metallomics, 10: 659--678. 2018.

Band gap modulation of graphene on SiC. Kolev, S; Atanasov, V; Aleksandrov, H; Milenov, T; The European Physical Journal B, 91: 1--7. 2018.

Ab-Initio molecular dynamics simulation of graphene sheet. Kolev, S; Balchev, I; Cvetkov, K; Tinchev, S; Milenov, T; Journal of Physics: Conference Series, 780: 012014. 2017.

Deposition of defected graphene on (001) Si substrates by thermal decomposition of acetone. Milenov, T I; Avramova, I; Valcheva, E; Avdeev, G V; Rusev, S; Kolev, S; Balchev, I; Petrov, I; Pishinkov, D; Popov, V N; Superlattices and Microstructures, 111: 45--56. 2017.

Synthesis and characterization of thin amorphous carbon films doped with nitrogen on (001) Si substrates. Balchev, I; Tzvetkova, K; Kolev, S; Terziiska, P; Szekeres, A; Miloushev, I; Tenev, T; Antonova, K; Peyeva, R; Ivanova, T; others; Journal of Physics: Conference Series, 764: 012013. 2016.

Solid state fuel-air explosives with enhanced power and stability. Kolev, S; Tzonev, T; 46th International Annual Conference of ICT, Karlsruhe, Germany, : . 2015.

Hydrogen atom transfer from water or alcohols activated by presolvated electrons. Iglev, H; Kolev, S K; Rossmadl, H; Petkov, S, P; Vayssilov, G N; The journal of physical chemistry letters, 6: 986--992. 2015.

Ab initio molecular dynamics of Na+ and Mg2+ countercations at the backbone of RNA in water solution. Kolev, S; Petkov, S, P; Rangelov, M; Vayssilov, G N; ACS Chemical Biology, 8: 1576--1589. 2013.

Density functional study of hydrogen bond formation between methanol and organic molecules containing Cl, F, NH2, OH, and COOH functional groups. Kolev, S K; Petkov, S, P; Rangelov, M A; Vayssilov, G N; The Journal of Physical Chemistry A, 115: 14054--14068. 2011.

Study of the Deposition of Nano-Sized Carbon Phases on {001} Silicon. Milenov, T; Trifonov, D; Kolev, S; Avramova, I; Russev, S; Avdeev, G; Valcheva, E; Available at SSRN 4247586, : . .