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Prof. Theodor D. Gurkov, Ph.D.
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Prof. Theodor D. Gurkov, Ph.D.

Research interests:

Mechanics and thermodynamics of liquid interfaces and membranes
Statistical thermodynamics of colloid systems
Interfacial and capillary phenomena
Thermodynamics and kinetics of adsorption, surface equation of state
Surface rheology (viscoelasticity, yield stress)
Stability of liquid dispersions (emulsions, foams, role of surfactants, proteins, particles)
Thin liquid films (interactions and hydrodynamics)
Micro-heterogeneous systems
Contact angles and wetting
   
» See papers and citations at Google Scholar.
» ResearcherID (Web of Science): D-2883-2011

 

Publications:

 

2018

1. Hardening of Particle/Oil/Water Suspensions Due to Capillary Bridges: Experimental Yield Stress and Theoretical Interpretation. K.D. Danov, M.T. Georgiev, P.A. Kralchevsky, G.M. Radulova, T.D. Gurkov, S.D. Stoyanov, E.G. Pelan. Adv. Colloid Interface Sci., 251 (2018) 80–96; doi: 10.1016/j.cis.2017.11.004

2. Rheology of Particle/Water/Oil Three-Phase Dispersions: Electrostatic vs. Capillary Bridge Forces. M.T. Georgiev, K.D. Danov, P.A. Kralchevsky, T.D. Gurkov, D.P. Krusteva, L.N. Arnaudov, S.D. Stoyanov, E.G. Pelan. J. Colloid Interface Sci., 513 (2018) 515–526. doi: 10.1016/j.jcis.2017.11.057

 

2014

1. Nanoemulsions Obtained via Bubble-Bursting at a Compound Interface. J. Feng, M. Roche, D. Vigolo, L.N. Arnaudov, S.D. Stoyanov, T.D. Gurkov, G.G. Tsutsumanova, H.A. Stone. Nature Physics 10 (2014) DOI: 10.1038/nphys3003.

 

2013

1. Surface Pressure and Elasticity of Hydrophobin HFBII Layers on the Air-Water Interface: Rheology vs. Structure Detected by AFM Imaging. R.D. Stanimirova, T.D. Gurkov, P.A. Kralchevsky, K.T. Balashev, S.D. Stoyanov, E.G. Pelan. Langmuir 29 (2013) 6053-6067.

2. Interfacial Rheology of Viscoelastic Surfactant-Polymer Layers. T.D. Gurkov, B. Nenova, E.K. Kostova, W. Gaschler. In Colloid and Interface Chemistry for Nanotechnology (P.A. Kralchevsky, R. Miller and F. Ravera, Eds.). Taylor & Francis, New York, 2013; pp. 351-367.

 

2012

1. Interfacial Layers from the Protein HFBII Hydrophobin: Dynamic Surface Tension, Dilatational Elasticity and Relaxation Times. N.A. Alexandrov, K.G. Marinova, T.D. Gurkov, K.D. Danov, P.A. Kralchevsky, S.D. Stoyanov, T.B.J. Blijdenstein, L.N. Arnaudov, E.G. Pelan, A. Lips, J. Colloid Interface Sci. 376 (2012) 296-306.

 

2011

1. Statistics of Rupture in Relation to the Stability of Thin Liquid Films with Different Size. T.D. Gurkov, J.K. Angarska, K.D. Tachev, W. Gaschler, Colloids and Surfaces A, 382 (2011) 174-180.

2. Adsorption Kinetics under the Influence of Barriers at the Subsurface Layer. T.D. Gurkov, Colloid Polym. Sci. 289 (2011) 1905-1915.

 

2006

1. Selection of Surfactants for Stable Paraffin-in-Water Dispersions, undergoing Solid-Liquid Transition of the Dispersed Particles. K. Golemanov, S. Tcholakova, N D. Denkov, and T. D. Gurkov, Langmuir 22 (2006) 3560-3569.

2. Interactions in Oil-Water-Oil Films Stabilized by Beta-Lactoglobulin; Role of the Surface Charge. E. S. Basheva, T. D. Gurkov, N. C. Christov, and B. Campbell, Colloids Surf. A, 282-283 (2006) 99-108.

3. Stability and Behavior of Thin Oil-Water-Oil Films with beta-Lactoglobulin. E.S. Basheva, T.D. Gurkov, K. Krumova, B. Campbell, In the Proceedings of the 4th World Congress on Emulsions, Lyon, France, 2006; Paper No. 3.3-489.

4. Layers of Nonionic Surfactants on Fluid Interfaces; Adsorption and Interactions in the Frames of a Statistical Model, T.D. Gurkov, I.B. Ivanov, In the Proceedings of the 4th World Congress on Emulsions, Lyon, France, 2006; Paper No. 2.1-509.

 

2005

1. Detachment of Oil Drops from Solid Surfaces in Surfactant Solutions: Molecular Mechanisms at a Moving Contact Line, P.A. Kralchevsky, K.D. Danov, V.L. Kolev, T.D. Gurkov, M.I. Temelska, and G. Brenn, Industrial & Engineering Chemistry Research 44 (2005) 1309-1321.

2. Ionic Surfactants on Fluid Interfaces: Determination of the Adsorption; Role of the Salt and the Type of the Hydrophobic Phase, T. D. Gurkov, D. T. Todorova, K. G. Marinova, C. Bilke-Crause, C. Gerber, and I. B. Ivanov, Colloids & Surfaces A 261 (2005) 29-38.

 

2004

1. Surface Forces in Model Oil-in-Water Emulsions Stabilized by Proteins. T.D. Dimitrova, F. Leal-Calderon, T.D. Gurkov, B. Campbell, Adv. Colloid Interface Sci. 108 (2004) 73-86.

 

2003

1. Monolayers of Globular Proteins on Air/Water Interface: Applicability of the Volmer Equation of State. T.D. Gurkov, S.C. Russev, K.D. Danov, I.B. Ivanov, B. Campbell, Langmuir 19 (2003) 7362-7369.

2. Interarm Interaction of DNA Cruciform Forming at a Short Inverted Repeat Sequence. M. Kato, S. Hokabe, S. Itakura, S. Minoshima, Y.L. Lyubchenko, T.D. Gurkov, H. Okawara, K. Nagayama, and N. Shimizuy, Biophys. J. 85 (2003) 402-408.

 

2002

1. Hydrodynamic Behavior and Stability of Approaching Deformable Drops. T. D. Gurkov, E. S. Basheva, In: "Encyclopedia of Surface & Colloid Science", A. T. Hubbard (Ed.), Marcel Dekker, New York, 2002.

2. Gentle Film Trapping Technique with Application to Drop Entry Measurements. A. Hadjiiski, S. Tcholakova, I. B. Ivanov, T. D. Gurkov, E. F. Leonard, Langmuir 18 (2002) 127-138.

 

2001

1. Stability of Oil-in-Water Emulsions Containing Protein. I. B. Ivanov, E. S. Basheva, T. D. Gurkov, A. Hadjiiski, L. N. Arnaudov, N. D. Vassileva, S. Tcholakova, B. Campbell, In: "Food Colloids: Fundamentals and Formulation", E. Dickinson and R. Miller (Eds.), Royal Society of Chemistry, Cambridge, 2001, pp. 73-90.

2. Measurement of the Yield Stress of Gellike Protein Layers on Liquid Surfaces by Means of an Attached Particle. J. T. Petkov, T. D. Gurkov, B. E. Campbell, Langmuir 17 (2001) 4556-4563.

3. Disjoining Pressure vs. Thickness Isotherms of Thin Emulsion Films Stabilized by Proteins. T.D. Dimitrova, F. Leal-Calderon, T.D. Gurkov, B. Campbell, Langmuir 17 (2001) 8069-8077.

4. Dilatational and Shear Rheology of Protein Layers on Water/Air Interface. T. D. Gurkov, J. T. Petkov, B. Campbell, R. P. Borwankar, in: "Food Colloids, Fundamentals of Formulation" (E. Dickinson, R. Miller, Eds.), Royal Soc. Chem., Cambridge, UK, 2001, 181-190.

 

2000

1. Kinetics of Cream Formation by the Mechanism of Consolidation in Flocculating Emulsions. T.D. Dimitrova, T.D. Gurkov, N.D. Vassileva, B.E. Campbell and R.P. Borwankar, J. Colloid Interface Sci. 230 (2000) 254-267.

2. Dilatational and Shear Rheology of Protein Layers on Water/Air Interface. T.D. Gurkov, J.T. Petkov, B. Campbell and R.P. Borwankar, Proceedings of the Conference "Food Colloids 2000: Fundamentals of Formulation" (April 3-6, 2000, Potsdam, Germany), E. Dickinson and R. Miller, Eds., Royal Soc. Chem., Cambridge, UK, 2001, p. 181.

3. Beta-Casein Adsorption Kinetics on Air-Water and Oil-Water interfaces Studied by Ellipsometry. S.C. Russev, T.V. Arguirov and T.D. Gurkov, Colloids and Surfaces B 19 (2000) 89-100.

4. Dilatational and Shear Elasticity of Gel-like Protein Layers on Air/Water Interface. J. Petkov, T. Gurkov, B. Campbell, R. Borwankar, Langmuir 16 (2000) 3703-3711.

 

1999

1. Size Dependence of the Stability of Emulsion Drops Pressed Against a Large Interface. E. S. Basheva, T. D. Gurkov, I. B. Ivanov, G. Bantchev, B. Campbell and R. Borwankar, Langmuir 15 (1999) 6764-6769.

 

1998

1. Energy of Adhesion of Human T Cells to Adsorption Layers of Monoclonal Antibodies Measured by Film Trapping Technique. I.B. Ivanov, A. Hadjiiski, N.D. Denkov, T.D. Gurkov, P.A. Kralchevsky and S. Koyasu, Biophys. J. 75 (1998) 545-556.

2. Stokes Flow Caused by the Motion of a Rigid Sphere Close to a Viscous Interface. K. D. Danov, T. D. Gurkov, H. Raszillier, and F. Durst, Chem. Eng. Sci. 53 (1998) 3413-3434.

3. Role of Surface Forces in the Stability of Evaporating Thin Liquid Films That Contain Surfactant Micelles. T. D. Gurkov, K. D. Danov, N. Alleborn, H. Raszillier and F. Durst, J. Colloid Interface Sci. 198 (1998) 224-240.

4. Role of Oscillatory Structural Forces for Interactions in Thin Emulsion Films Containing Micelles. K. G. Marinova, T. D. Gurkov, T. D. Dimitrova, R. G. Alargova and D. Smith, Langmuir 14 (1998) 2011-2019.

5. Gradual Disintegration of Protein Lumps Contained in Thin Emulsion Films: Role of the Surface Diffusion. T.D. Gurkov, K.G. Marinova, A. Zdravkov, C. Oleksiak and B. Campbell, Progress in Colloid & Polymer Sci. 110 (1998) 263-268.

6. Oscillatory Structural Interactions in Thin Emulsion Films Containing Micelles of Ionic Surfactant. K.G. Marinova, T.D. Gurkov, T.D. Dimitrova, R.G. Alargova and D. Smith, Progress in Colloid & Polymer Sci. 110 (1998) 245-250.

7. Food Dispersion Stability. R.P. Borwankar, B. Campbell, C. Oleksiak, T.D. Gurkov, D.T. Wasan and Wen Xu, in: "Food Emulsions and Foams: Interfaces, Interactions and Stability" (E. Dickinson and J.M. Rodriguez-Patino, Eds.), Royal Society of Chemistry, London, 1998, p. 45-60.

 

1997

1. Hydrodynamic Theory for Spontaneously Growing Dimple in Emulsion Films with Mass Transfer. K. D. Danov, T. D. Gurkov, T. Dimitrova, I. B. Ivanov and D. Smith, J. Colloid Interface Sci. 188 (1997) 313-324.

2. The Role of Additives for the Behaviour of Thin Emulsion Films Stabilized by Proteins. K. G. Marinova, T. D. Gurkov, O. D. Velev, I. B. Ivanov, B. Campbell and R. P. Borwankar, Colloids and Surfaces A 123-124 (1997) 155-167.

3. Role of the Oscillatory Structural Forces for the Stability of Emulsions. K.G. Marinova, T.D. Gurkov, G.B. Bantchev and P.A. Kralchevsky, In: Proceedings of the 2nd World Congress on Emulsions, Paper 2-3-151 (1997).

4. Stability of Liquid Films in Non-preequilibrated Emulsions. T. D. Gurkov, K. D. Danov, O. D. Velev, I. B. Ivanov, R. P. Borwankar, In: Proceedings of the 2nd World Congress on Emulsions, Paper 2-3-155 (1997).

5. Mechanics and Thermodynamics of Interfaces, Thin Liquid Films and Membranes. T. D. Gurkov, and P. A. Kralchevsky, J. Dispersion Sci. Technology 18 (1997) 609-623.

6. Emulsion Films Stabilized by Proteins. K.G. Marinova, T.D. Gurkov, R.P. Borwankar, B. Campbell and C. Oleksiak, Proceedings of Second World Congress on Emulsions, EDS-Editeur, Paris, France, 1997; Paper No. 2-3-156.

 

1996

1. Electric Component of the Interfacial Bending Moment and Curvature Elastic Moduli. P. A. Kralchevsky, T. D. Gurkov and K. Nagayama, J. Colloid Interface Sci. 180 (1996) 619-622.

2. Formation of Dimers in Lipid Monolayers. T. D. Gurkov, P. A. Kralchevsky, K. Nagayama, Colloid Polym. Sci. 274 (1996) 227-238.

 

1995

1. Abnormal Thickness and Stability of Nonequilibrium Liquid Films. O. D. Velev, T. D. Gurkov, I. B. Ivanov and R. P. Borwankar, Phys. Rev. Letters 75 (1995) 264-267.

 

1994

1. Kinetic Model for the Simultaneous Processes of Flocculation and Coalescence in Emulsion Systems. K. D. Danov, I. B. Ivanov, T. D. Gurkov, R. Borwankar, J. Colloid Interface Sci. 167 (1994) 8-17.

2. Experimental Investigations on Model Emulsion Systems Stabilized with Non-ionic Surfactant Blends. O. D. Velev, T. D. Gurkov, Sv. K. Chakarova, B. I. Dimitrova, I. B. Ivanov and R. P. Borwankar, Colloids and Surfaces A 83 (1994) 43-55.

3. Composition of Mixed Adsorption Layers of Non-Ionic Surfactants on Oil/Water Interfaces. T. D. Gurkov, T. S. Horozov, I. B. Ivanov and R. P. Borwankar, Colloids and Surfaces A 87 (1994) 81-92.

 

1993

1. Spontaneous Cyclic Dimpling in Emulsion Films Due to Mass Transfer between the Phases. O. D. Velev, T. D. Gurkov and R. P. Borwankar, J. Colloid Interface Sci. 159 (1993) 497-501.

2. Surface Bending Moments and the Interfacial Composition in Emulsion Systems. T.D. Gurkov, P.A. Kralchevsky and I.B. Ivanov, Proc. First World Congress on Emulsions, Paris, 1993.

3. Kinetics of Simultaneous Flocculation and Coalescence in Emulsion Systems. K.D. Danov, T.D. Gurkov, I.B. Ivanov and R.P. Borwankar, Proc. First World Congress on Emulsions, Paris, 1993.

4. Stability of Films and Emulsions in the Presence of Nonionic Surfactant Blends. O. Velev, T, Gurkov, R. Alargova, K. Marinova, I. B. Ivanov, R. Borwankar, Proc. First World Congress in Emulsion, Paris, 1993.

 

1991

1. The van der Waals Component of the Interfacial Bending Moment: I. Contribution of the Pressure Tensor Tails. P. A. Kralchevsky and T. D. Gurkov, Colloids and Surfaces 56 (1991) 101-118.

2. The van der Waals Component of the Interfacial Bending Moment. II. Model Development and Numerical Results. T. D. Gurkov, P. A. Kralchevsky and I. B. Ivanov, Colloids and Surfaces 56 (1991) 119-148.

3. The Interfacial Bending Moment: Thermodynamics and Contributions of the Electrostatic Interactions. P. A. Kralchevsky, T. D. Gurkov and I. B. Ivanov, Colloids and Surfaces, 56 (1991) 149-176.

 

1990

1. Surface Tension and Surface Energy of Curved Interfaces and Membranes. T. D. Gurkov and P. A. Kralchevsky, Colloids and Surfaces 47 (1990) 45-68.