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Memoirs

Created 7.4.2015
Updated 24.8.2023
Biography
ALEXANDER IVANOV DERZHANSKI
(10.02.1933 – 06.04.2015)



Born in Sofia

Research

The area of his work was soft matter physics, liquid crystals, electronics, molecular physics and condense matter physics

Alexander Derzhanski investigated properties of huge number of new matterials, effects and medium for electronics, optoelectronics and biological structures

He developed new methods for modeling functions, molecular structure investigation and liquid crystal indicators

Professional experience

Derjanski build Laboratory for Nuclear Magnetic Resonance in the Institute of Physics at the Bulgarian Academy of Sciences (1958)

He was founder of the Bulgarian liquid crystal scientific group and Laboratory of Liquid Crystal in the Institute of Solid State Physics (1968–1992)

He was head of the Laboratory of “Physical Chemistry of membrans” in the Central Laboratory of BAS (1982–1988)

Awards

A. Derzhanski was a corresponding member (1995–2008) and member of BAS (2008–2015)

He celebrated his 80 anniversary (08.02.2013)

Publications

  1. A. Zheliaskova, A. Derzhanski, The phase behavior of a mixed lyotropic system, J. Disp. Sci. & Techn. (21) 119-128 (2000)

  2. I. Bivas, L. Bivolarski, M. Mitov, A. Derzhanski, Correlations between the form fluctuation modes of flaccid quasispherical lipid vesicles and their role in the calculation of the curvature elastic modulus of the vesicle membrane. Numerical results, J. Phys. II France (2) 1423 (1992)

  3. Derzhanski, A., Petrov, A. G., Todorov, A. T., Hristova, K.. Flexoelectricity of lipid bilayers. Liquid Crystals, 7, 3, Taylor & Francis Group, 1990

  4. Derzhanski, A., Petrov, A., Pavloff, Y. Curvature induced conductive and displacement currents through lipid bilayers. J. Physique Lett., 42, 6, 1981

  5. I. Bivas, A. Derzhanski, Statistical Mechanical Theory for Hydrophobic Core of Lipid Bilayer, Mol. Cryst. Liquid Crystals (74) 1771 (1981)

  6. A. Derzhanski, H. Hinov, M. Mitov, A Bulk Flexoelectric Effect in a Wedge like Nematic Liquid Crystal Layer, Acta Phys. Polonica, A55, 567 (1979)

  7. A. G. Petrov, V. Tverdislov, A. Derzhanski, Flexoelectric aspects of lipid-protein interaction in biomembranes, Ann. Phys. 3, 273. 4 (1978)

  8. A. Derzhanski, A. G. Petrov, M. Mitov, Molecular Asymmetry and Saddle-Splay Elasticity in Lipid Bilayers, Ann. Phys. (3) 297 (1978)

  9. A. Derzhanski, A. G. Petrov, M. Mitov, One Dimensional Dielectric-Flexoelectric Deformations in Nematic Layers, Journal Pysics (Paris) (39) 273 (1978)

  10. A. G. Petrov, M. Mitov, A. Derzhanski, Saddle Splay Instability in Lipid Bilayers, Physics Letters (65A) 374 (1978)

  11. A. G. Petrov, A. Derzhanski, Flexoelectricity and surface polarization, Mol. Cryst. Liq. Cryst. Lett. 41, 41 (1977)

  12. A. G. Petrov, A. Derzhanski, On some problems in the theory of elastic and flexoelectric effects in bilayer lipid membranes and biomembranes, J. Physique suppl. (37) C3-155 – C3-160 (1976)

  13. A. Derzhanski, A. G. Petrov, I. Bivas, One-dimensional approach to the spontaneous deformations in nematic liquid crystals, Compt. rend. Acad. bulg. Sci. (28) 1327 (1975)

  14. A. Derzhanski, M. Mitov, Statistical Characteristics of a Deformed Liquid Crystal Layer in a Slightly Nonhomogeneous D. C. Electric Field, Compt. Rend. Acad. Bulg. Sci. (28) 1331 (1975)

  15. A. Derzhanski, A. G. Petrov, Chr. P. Khinov, B. L. Markovski, Piezoelectric deformations of nematic liquid cristals in nonhomogeneous d.c. electric field, Bulg. J. Phys. (1) 165 (1974)

  16. A. Derzhanski, M. Mitov, Chr. Khinov, Piezoelectric Deformation of Liquid Crystal Layer in a Slightly Non-homogeneous Electric Field, Compt. Rend. Acad. Bulg. Sci. (27), 453 (1974)

  17. A. Derzhanski, A. G. Petrov, A molecular statistical approach to the piezoelectric properties of nematic liquid crystals - one-dimensional model, Compt. rend. Acad. bulg. Sci. 25, 167 (1972)

  18. A. Derzhanski, S. Naydenova, L. Grigorov, A. G. Petrov, NMR Fourier spectroscopy in liquid crystals, Proc. XVIth Congress AMPERE, Bucharest, p. 841 (1971)

  19. A. Derzhanski, A. G. Petrov, Dielectric properties of nematic liquid crystal with ellipsoidal molecules, Compt. rend. Acad. bulg. Sci. 24, 569 (1971)

  20. A. Derzhanski, A. G. Petrov, A possible relationship between the dielectric permeability and the piezoelectric properties of nematic liquid crystals, Phys. Lett. 34A, 427 (1971)

  21. A. Derzhanski, A. G. Petrov, Inverse currents and contact behaviour of some nematic liquid crystals, Phys. Lett. 36A, 307 (1971)

  22. A. Derzhanski, A. G. Petrov, A molecular-statistical approach to the piezoelectric properties of nematic liquid crystals, Phys. Lett. 36A, 483 (1971)

References

  1. Obituary from the Bulgarian Academy of Sciences

  2. Institute of Solid State Physics Obituary

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