Dr. Valdemaras Aleksa

Dr. Valdemaras Aleksa

Phone: +370 699 44 018

E-mail: 

Institute of Chemical Physics (ICP)

Natural sciences/Physics N 002

Associate professor, Institute of Chemical Physics (ICP)

Vibrational Spectroscopy; Conformational analysis; Ionic liquids; Polychromy of artworks; Physics teaching;

https://www.researchgate.net/profile/V-Aleksa

1. Stocka J., Platakyte R., McFadden TMC., Ceponkus J., Aleksa V., Hanna A.G., Sablinskas V.,Rodziewicz P., Guirgis GA., Conformational diversity of 1 chloro-1-chloromethylsilacyclohexane with experimental (Raman and IR) and computational (DFT, MP2) methods, Journal of Molecular Structure, vol.1279, p. 131644, 2022. https://doi.org/10.1016/j.molstruc.2021.131644.
2. T.M.C. McFadden, R. Platakyte, J. Stocka, J. Ceponkus, V. Aleksa, T. Carrigan-Broda, V. Sablinskas, P. Rodziewicz, G.A. Guirgis, Experimental (Raman and IR) and computational (DFT, MP2) studies of conformational diversity of 1-chloromethyl-1-fluorosilacyclohexane, Journal of Molecular Structure, vol. 1221, pp 128786, 2020. https://doi.org/10.1016/j.molstruc.2020.128786.
3. J. Kausteklis, V. Aleksa, M.A. Iramain, S.A. Brandan, Effect of cation-anion interactions on the structural and vibrational properties of 1-buthyl-3-methyl imidazolium nitrate ionic liquid, Journal of Molecular Structure, 1164 (2018), 563-576. DOI: 10.1016/j.molstruc.2018.03.100.
4. J. Kausteklis, M. Talaikis, V. Aleksa and V. Balevičius, Raman spectroscopy study of water confinement in ionic liquid 1-Butyl-3-Methylimidzolium Nitrate, Journal of Molecular Liquids, vol. 271, pp. 747–755, 2018.
5. Kausteklis J., Balevičius V., Aleksa V., Two‐dimensional Raman spectroscopy study of ionogel phase formation in long‐chain ionic liquid/water systems, Journal of Raman Spectroscopy, 48 (2017), 126-131. SSN: 0377-0486. DOI: 10.1002/jrs.4983.
6. Dagys L., Klimavičius V., Kausteklis V., Chodosovskaja A., Aleksa V., Kareiva A. and Balevičius V., Solid‐state 1H and 31P NMR and FTIR spectroscopy study of static and dynamic structures in sol‐gel derived calcium hydroxyapatites, Lithuanian Journal of Physics, 55 (2015), 1-9. DOI: 10.3952/physics.v55i1.3052.
7. Čeponkus J., Jonušas M., Cotter C. P., Pučetaitė M., Aleksa V., Guirgis G. A., Šablinskas V. Structural studies of 1,1-dimethyl-2-oxy-1-silacyclohexane by means of matrix isolation infrared absorption spectroscopy. Journal of physical chemistry A. Washington: American Chemical Society. ISSN: 1089-5639, eISSN: 1520-5215. 2015, Vol. 119, iss. 11, p. 2721-2726. DOI: 10.1021/jp5099014.
8. Guirgis G. A., Dukes H. W., Wyatt J. K., Nielsen C. J., Horn A., Aleksa V., Klaeboe P. Vibrational spectra, quantum chemical calculations and spectral assignments of 1,1-difluoro-1-silacyclohexane, Spectrochimica acta. Part A: Molecular and biomolecular spectroscopy, Amsterdam: Elsevier BV. 2015, Vol. 136, part A, p. 51-57. ISSN: 1386-1425 ; DOI: 10.1016/j.saa.2013.10.058.
9. Klimavičius V., Gdanec Z., Kausteklis J., Aleksa V., Aidas K., Balevičius V., NMR and Raman spectroscopy monitoring of proton/deuteron exchange in aqueous solutions of ionic liquids forming hydrogen bond: a role of anions, self-aggregation, and mesophase formation, Journal of Physical Chemistry B, 117 (2013), 10211-10220. DOI: 10.1021/jp4021245.

1. Project No. 226716 (FP7/2007-2013) under Grant Agreement “HR FTIR studies of the structure and stability of primary ozonides of aliphatic 1-alkenes” 2007-2013, investigator.
2. Research Group Cooperation Project with US Scientists „Characterization of Functional Organic Cyclic Silicon and Germanium Derivatives by Spectral Methods“, MIP-071/2013, SIGESPEK (2013-2015), project leader.
3. Project „Magneto-plasmonic nanoparticles for SERS analysis of biological surfaces (SM-ARTSERS)“. Managing institution: State Scientific Research Institute Center for Physical Sciences and Technology. Partner institution: Vilnius University (2020 – 2023), investigator.
4. "Optimizing the network of higher education institutions and improving the quality of studies by connecting the University of Šiauliai to the University of Vilnius", no. 09.3.1-esfa-v-738-03-0001 (2020-2023), executor of the project.

Martynas Pareigis, 02P Physics (2010-2012)

Jonas Kausteklis, 02P Physics (2014-2018)

Applied Spectroscopy (Faculty of Physics)

Health Physics (Faculty of Medicine)

Life Sciences (Faculty of Medicine)

Didactics of physics (Faculty of Philosophy)

Each academic year supervising 1-2 Master and/or Bachelor students. Was a supervisor of more than 50 Student Thesis.

Participation in the national/international governing bodies, commissions, committees, boards etc.

1. Member of the VU Teacher Training Professional and Adjunct Pedagogical Studies Program Committee (since 2015).
2. Expert of the Study Quality Assessment Center (SKVC) (since 2018)
3. Member of the evaluation committee for the best dissertations in physical, biomedical, technological and agricultural science fields in 2018, LJMS (2019).
4. Member of the Dr. R. Gaška scholarship awarding commission (since 2020);
5. . Member of the Defence Panel for the defence of the doctoral dissertations: R. Mackevičiūtė (2017) Vilnius University D. Jablonskas (2018) Vilnius University M. Šimėnas (2018) Vilnius University S. Balčiūnas (2020) Vilnius University

Referee for Lithuanian Journal of Physics;

Evaluation of the study program "Teaching Chemistry and Physics" of the Lithuanian University of Education. 2015. Study Quality Assessment Center. Program evaluation expert.

Articles in science popularization magazine "Mokslas ir gyvenimas" and "Universitas Vilnensis"