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Prof. Nikolai D. Denkov, Ph.D., D.Sc., Corresponding Member of Bulgarian Acad. Sci.
Head of the Laboratory for Active Formulations and Materials
CV | Publications | Image Representation | Phone: +359 2 8161 639

Prof. Nikolai D. Denkov, Ph.D., D.Sc.

Research interests:

Foams, Antifoams and Detergency
Rheology of Foams and Emulsions
Food Emulsions and Emulsification
Colloid Crystals and Nanomaterials
Light Scattering and Electrokinetic Phenomena
   
» See papers and citations at Google Scholar.
» ResearcherID (Web of Science): A-2065-2008
» Author ID (SCOPUS): 7004047885
» ORCID: 0000-0003-1118-7635

Publications:

 

2019

1. Rotator Phases in Alkane Systems: In Bulk, Surface Layers and Micro/nano-confinements. D. Cholakova, N. Denkov. Adv. Colloid Interface Sci. 269 (2019) 7–42; doi: 10.1016/j.cis.2019.04.001

2. Multilayer Formation in Self-Shaping Emulsion Droplets. D. Cholakova, N. Denkov, S. Tcholakova, Zh. Valkova, S. Smoukov. Langmuir 35 (2019) 5484–5495; doi: 10.1021/acs.langmuir.8b02771

 

2018

1. Control of Surfactant Solution Rheology Using Medium-Chain Cosurfactants. Z. Mitrinova, S. Tcholakova, N. Denkov. Colloids Surf. A, 537 (2018) 173–184; doi: 10.1016/j.colsurfa.2017.10.018

2. Micellar Solubilization of Poorly Water-soluble Drugs: Effect of Surfactant and Solubilizate Molecular Structure. Z. Vinarov, V. Katev, D. Radeva, S. Tcholakova, N. Denkov. Drug. Dev. Ind. Pharm., 44 (2018) 677–686 doi: 10.1080/03639045.2017.1408642

3. Self-regulation of Foam Volume and Bubble Size during Foaming via Shear Mixinge. N. Politova, S. Tcholakova, Zh. Valkova, K. Golemanov, N. D. Denkov. Colloids Surf. A, 539 (2018) 18–28; doi: 10.1016/j.colsurfa.2017.12.006

4. Emergence of polygonal shapes in oil droplets and living cells: the potential role of tensegrity in the origin of life. R. Gordon, M. M. Hanczyc, N. D. Denkov, M. A. Tiffany, S. K. Smoukov, in Habitability of the Universe Before Earth, R. Gordon & A. Sharov eds., Academic Press, 2018, pp. 427-490.

5. From Pickering Foams to Porous Carbonate Materials: Crack-free Structuring in Drying Ceramics. M. Hristova, I. Lesov, S. Tcholakova, V. Goletto, N. Denkov. Colloids Surf. A 552 (2018) 142–152; doi: 10.1016/j.colsurfa.2018.05.025

6. Saponin Adsorption at the Air−Water Interface Neutron Reflectivity and Surface Tension Study. J. Penfold, R. K. Thomas, I. Tucker, J. T. Petkov, S. D. Stoyanov, N. Denkov, K. Golemanov, S. Tcholakova, and J. R. P. Webster. Langmuir 34 (2018) 9540−9547; doi: 10.1021/acs.langmuir.8b02158

7. Solubilisation of Hydrophobic Drugs by Saponins. Z. Vinarov, D. Radeva, V. Katev, S. Tcholakova, N. Denkov. Ind. J. Pharm. Sci. 80 (2018) 709−718

8. Effect of Surfactant–Bile Interactions on the Solubility of Hydrophobic Drugs in Biorelevant Dissolution Media. Z. Vinarov, V. Katev, N. Burdzhiev, S. Tcholakova, N. Denkov, Mol. Pharm. 15 (2018) 5741−5753 doi: 10.1021/acs.molpharmaceut.8b00884

9. Bottom-Up Synthesis of Polymeric Micro- and Nanoparticles with Regular Anisotropic Shapes. I Lesov, Z. Valkova, E. Vassileva, G. Georgiev, K. Ruseva, M. Simeonov, S. Tcholakova, N. Denkov, S. Smoukov, Macromolecules 51 (2018) 7456−7462; doi: 10.1021/acs.macromol.8b00529

 

2017

1. Factors Affecting the Stability of Water-oil-water Emulsion Films. N. Politova, S. Tcholakova, N. D. Denkov. Colloids Surf. A, 522 (2017) 608–620; doi: 10.1016/j.colsurfa.2017.03.055

2. Efficient Self-Emulsification via Cooling-Heating Cycles. S. Tcholakova, Z. Valkova, D. Cholakova, Z. Vinarov, I. Lesov, N. D. Denkov, K. Smoukov. Nature Comm., 8 (2017) 15012; doi: 10.1038/ncomms15012

3. Theory of Shape-Shifting Droplets. P. A. Haas, R. E. Goldstein, S. K. Smoukov, D. Cholakova, N. Denkov. Phys. Rev. Lett., 118 (2017) 088001; doi: 10.1103/PhysRevLett.118.088001

4. Role of Pickering Stabilization and Bulk Gelation for the Preparation and Properties of Solid Silica Foams. I. Lesov, S. Tcholakova, M. Kovadjieva, T. Saison, M. Lamblet, N. Denkov. J. Colloid Interface Sci. 504 (2017) 48–57; doi:10.1016/j.jcis.2017.05.036

5. "Self-Shaping" of Multicomponent Drops. D. Cholakova, Zh. Valkova, S. Tcholakova, N. Denkov, S. K. Smoukov. Langmuir 33 (2017) 5696−5706. doi: 10.1021/acs.langmuir.7b01153

6. Coalescence Stability of Water-in-Oil drops: Effects of Drop Size and Surfactant Concentration. N. Politova, S. Tcholakova, S. Tsibranska, N. D. Denkov, K. Muelheims. Colloids Surf. A 531 (2017) 32–39; doi: 10.1016/j.colsurfa.2017.07.085

7. Self-Assembly of Escin Molecules at the Air−Water Interface as Studied by Molecular Dynamics. S. Tsibranska, A. Ivanova, S. Tcholakova, N. Denkov. Langmuir 33 (2017) 8330−8341; doi: 10.1021/acs.langmuir.7b01719

8. Mechanisms and Control of Self-Emulsification upon Freezing and Melting of Dispersed Alkane Drops. Zh. Valkova, D. Cholakova, S. Tcholakova, N. Denkov, S. K. Smoukov. Langmuir 33 (2017) 12155−12170; doi: 10.1021/acs.langmuir.7b02048

9. Role of Surface Properties for the Kinetics of Bubble Ostwald Ripening in Saponin-stabilized Foams. S. Tcholakova, F. Mustan, N. Pagureva, K. Golemanov, N. D. Denkov, E. G. Pelan, S. D. Stoyanov. Colloids and Surfaces A 534 (2017) 16–25; doi: 10.1016/j.colsurfa.2017.04.055

 

2016

1. Role of Interactions between Cationic Polymers and Surfactants for Foam Properties. Z. Mitrinova, S. Tcholakova, N. Denkov, K. P. Ananth. Colloids Surf. A 489 (2016) 378–391.

2. Surface Properties of Adsorption Layers Formed from Triterpenoid and Steroid Saponins. N. Pagureva, S. Tcholakova, K. Golemanov, N. Denkov, E. Pelan, S. D. Stoyanov. Colloids and Surfaces A: Physicochem. Eng. Aspects 491 (2016) 18–28.

3. Mechanism of Lowering Cholesterol Absorption by Calcium Studied by In Vitro Digestion Model. L. Vinarova, Z. Vinarov, S. Tcholakova, N. D. Denkov, S. Stoyanov, A. Lips. Food & Function 7 (2016) 151–163.

4. Kinetics of Drop Breakage and Drop-Drop Coalescence in Turbulent Flow. S. Tcholakova, N. Politova, N. Denkov. Biomath Communications 3 (2016) 1–163.

5. On the Mechanism of Drop Self-Shaping in Cooled Emulsions. N. Denkov, D. Cholakova, S. Tcholakova, S. Smoukov. Langmuir 32 (2016) 7985–7991.

6. Control of Drop Shape Transformations in Cooled Emulsions. D. Cholakova, N. Denkov, S. Tcholakova, I. Lesov, S. K. Smoukov. Adv. Colloid Interface Sci. 235 (2016) 90–107.

7. Factors Affecting the Coalescence Stability of Microbubbles. N. Pagureva, S. Tcholakova, K. Rusanova, N. Denkov, T. Dimitrova. Colloids Surf. A 508 (2016) 21–26.

8. Particle Detachment from Fluid Interfaces: Theory vs. Experiments. S.E. Anachkov, I. Lesov, M. Zanini, P.A. Kralchevsky, N.D. Denkov, L. Isa. Soft Matter 12 (2016) 7632–7643; doi: 10.1039/C6SM01716A.

 

2015

1. Adsorption of Linear Alkyl Benzene Sulfonates on Oil–Water Interface: Effects of Na+, Mg2+ and Ca2+ ions. S. E. Anachkov, S. Tcholakova, D. T. Dimitrova, N. D. Denkov, N. Subrahmaniam, P. Bhunia. Colloids and Surfaces A: Physicochem. Eng. Aspects 466 (2015) 18–27.

2. Lowering of Cholesterol Bioaccessibility and Serum Concentrations by Saponins: in Vitro and in Vivo Studies. L. Vinarova, Z. Vinarov, V. Atanasov, I. Pantcheva, S. Tcholakova, N. Denkov, S. Stoyanov. Food & Function 6 (2015) 501–512.

3. Mechanisms of Cholesterol and Saturated Fatty Acid Lowering by Quillaja saponaria Extract, Studied by in vitro Digestion Model. L. Vinarova, Z. Vinarov, B. Damyanova, S. Tcholakova, N. Denkov, S. Stoyanov. Food & Function 6 (2015) 1319–1330.

4. Self-Shaping of Oil Droplets via the Formation of Intermediate Rotator Phases upon Cooling. N. Denkov, S. Tcholakova, I. Lesov, D. Cholakova, S. K. Smoukov. Nature 528 (2015) 392–395.

5. Molecular Dynamics Simulation of the Aggregation Patterns in Aqueous Solutions of Bile Salts at Physiological Conditions. F. Mustan, A. Ivanova, G. Madjarova, S. Tcholakova, N. Denkov, J. Phys. Chem. B 119 (2015) 15631–15643.

 

2014

1. Drying of particle-loaded foams for production of porous materials: mechanism and theoretical modeling. I. Lesov, S. Tcholakova, N. Denkov. RSC Adv. 4 (2014) 811-823.

2. Mechanistic Understanding of the Modes of Action of Foam Control Agents. N.D. Denkov, K.G. Marinova, S.S. Tcholakova. Adv. Colloid Interface Sci. 206 (2014) 57-67.

3. Factors Controlling the Formation and Stability of Foams Used as Precursors of Porous Materials. I. Lesov, S. Tcholakova, N. Denkov. J. Colloid Interface Sci. 426 (2014) 9-21.

4. The Role of the Hydrophobic Phase in the Unique Rheological Properties of Saponin Adsorption Layers. K. Golemanov, S. Tcholakova, N. Denkov, E. Pelan, S. Stoyanov. Soft Matter 10 (2014) 7034–7044.

 

2013

1. Surface and Foam Properties of SLES + CAPB + Fatty Acid Mixtures: Effect of pH for C12–C16 Acids. Z. Mitrinova, S. Tcholakova, K. Golemanov, N. Denkov, M. Vethamuthu, K.P. Ananthapadmanabhan, Colloids and Surfaces A: Physicochem. Eng. Aspects 438 (2013) 186-198.

2. Role of Polymer–Surfactant Interactions in Foams: Effects of pH and Surfactant Head Group for Cationic Polyvinylamine and Anionic Surfactants. R. Petkova, S. Tcholakova, N.D. Denkov, Colloids and Surfaces A: Physicochem. Eng. Aspects 438 (2013) 174-185.

3. US Patent "Process for Producing Finely Divided Suspensions by Melt Emulsification. R. Engel, T. Danner, B. Sachweh, S. Judat, A. Bauder, N. Denkov, S. Tcholakova, Pub. No.: US 2011/0275738.

4. WIPO Patent "Method for producing fine particle suspensions by melt emulsification". R. Engel, T. Danner, B. Sachweh, S. Judat, A. Bauder, N. Denkov, S. Tcholakova, WO 2011/138348 A1.

5. WIPO Patent "High-performance thermal insulation materials". A. Dekoninck, N. Denkov, I. Lesov, S. Tcholakova, K. Golemanov, WO 2013/007958 A1.

6. Remarkably high surface visco-elasticity of adsorption layers of triterpenoid saponins. K. Golemanov, S. Tcholakova, N. Denkov, E. Pelan, S. D. Stoyanov, Soft Matter, 2013, 9, 5738.

7. Efficient Control of the Rheological and Surface Properties of Surfactant Solutions Containing C8−C18 Fatty Acids as Cosurfactants. Z. Mitrinova, S. Tcholakova, J. Popova, N. Denkov, B. Dasgupta, K.P. Ananthapadmanabhan, Langmuir 29 (2013) 8255-8265.

 

2012

1. Effect of Cationic Polymers on Foam Rheological Properties. N. Politova , S. Tcholakova , K. Golemanov, N.D. Denkov, M. Vethamuthu, K.P. Ananthapadmanabhan, Langmuir 28 (2012) 1115-1126.

2. Foaming and Foam Stability for Mixed Polymer−Surfactant Solutions: Effects of Surfactant Type and Polymer Charge. R. Petkova, S. Tcholakova, N. Denkov, Langmuir 28 (2012) 4996−5009.

3. Foam Rheology. N. D. Denkov, S. Tcholakova, R. Hoehler, S. Cohen-Addad, Chapter 6 in Foam Engineering: Fundamentals and Applications (1st Edition; P. Stevenson, Ed.), John Wiley & Sons, Chichester, UK, 2012.

4. Impact of the Surfactant Structure on the Foaming/Defoaming Performance of Nonionic Block Copolymers in Na Caseinate Solutions. K.G. Marinova, L.M. Dimitrova, R.Y. Marinov, N.D. Denkov, A. Kingma, Bulg. J. Phys. 39 (2012) 53-64.

5. Effects of Emulsifier Charge and Concentration on Pancreatic Lipolysis. 1. In the Absence of Bile Saltsd. Z. Vinarov, Y. Petkova, S. Tcholakova, N. Denkov, S. Stoyanov, E. Pelan, A Lips, Langmuir 28 (2012) 8127-8139.

6. Effects of Emulsifier Charge and Concentration on Pancreatic Lipolysis: 2. Interplay of Emulsifiers and Biles. Z. Vinarov, S. Tcholakova, B. Damyanova, Y. Atanasov, N. Denkov, S. Stoyanov, E. Pelan, A. Lips, Langmuir 28 (2012) 12140-12150.

7. Surface Shear Rheology of Saponin Adsorption Layers. K. Golemanov, S. Tcholakova, N. Denkov, E. Pelan, S. Stoyanov, Langmuir 28 (2012) 12071-12084.

8. In vitro study of triglyceride lipolysis and phase distribution of the reaction products and cholesterol: effects of calcium and bicarbonate. Z. Vinarov, L. Petrova, S. Tcholakova, N. Denkov, S. Stoyanov, A. Lips, Food & Function 3 (2012) 1206-1220.

 

2011

1. Collection of Papers from the 8th EUFOAM Conference and the Meetings of COST Actions D43 and P21, Borovets, Bulgaria, 13-16 July 2010. N.D. Denkov, P.A. Kralchevsky, Colloids and Surfaces A, 382 (2011) 1-2.

2. Surface Rheology of Saponin Adsorption Layers. R. Stanimirova, K. Marinova, S. Tcholakova, N.D. Denkov, S. Stoyanov, E. Pelan, Langmuir 27 (2011) 12486-12498.

3. Efficient Emulsification of Viscous Oils at High Drop Volume Fraction. S. Tcholakova, I. Lesov, K. Golemanov, N. Denkov, S. Judat, R. Engel, T. Daner, Langmuir 27 (2011) 14783-14796.

4. Control of Ostwald Ripening by Using Surfactants with High Surface Modulus. S. Tcholakova, Z. Mitrinova, K. Golemanov, N. Denkov, M. Vethamuthu, K. P. Ananthapadmanabhan, Langmuir 27 (2011) 14807-14819.

 

2010

1. Antibubble Lifetime: Influence of the Bulk Viscosity and of the Surface Modulus of the Mixture. S. Dorbolo, D. Terwagne, R. Delhalle, J. Dujardin, N. Huet, N. Vandewalle, N. Denkov, Colloids Surf. A 365 (2010) 43-45.

2. Emulsification and Emulsion Stability of Silica-charged Silicone Oils. S. Tcholakova, N. D. Denkov, D. Hristova, M. Deruelle, In The Proceedings of 5th World Congress on Emulsions, Lyon, France, 2010; Paper No. 4.1-50.

3. Drop Size in Concentrated Emulsions, Obtained by Rotor-Stator Homogenization. S. Tcholakova, I. Lesov, K. Golemanov, N. D. Denkov, S. Judat, In The Proceedings of 5th World Congress on Emulsions, Lyon, France, 2010; Paper No. 1.1-53.

4. Viscous Ffriction in Sheared Concentrated Emulsions and Foams. N. D. Denkov, S. Tcholakova, K. Golemanov, A. Lips, In The Proceedings of 5th World Congress on Emulsions, Lyon, France, 2010; Paper No. 1.3-69.

 

2009

1. Modified Capillary Cell for Foam Film Studies Allowing Exchange of the Film-Forming Liquid. P.A. Wierenga, E.S. Basheva, N.D. Denkov, Langmuir 25 (2009) 6035-6039.

2. The Role of Surfactant Type and Bubble Surface Mobility in Foam Rheology. N. D. Denkov, S. Tcholakova, K. Golemanov, K. P. Ananthpadmanabhan, A. Lips, Soft Matter 5 (2009) 3389-3408.

3. Jamming in Sheared Foams and Emulsions, Explained by Critical Instability of the Films between Neighboring Bubbles and Drops. N. D. Denkov, S. Tcholakova, K. Golemanov, A. Lips, Phys. Rev. Lett. 103 (2009) 118302.

 

2008

1. Comparison of Solid Particles, Globular Proteins and Surfactants as Emulsifiers. S. Tcholakova, N. D. Denkov, and A. Lips, Phys. Chem. Chem. Phys. 10 (2008) 1608-1627 (invited article).

2. Viscous Friction in Foams and Concentrated Emulsions under Steady Shear. N. D. Denkov, S. Tcholakova, K. Golemanov, K. P. Ananthapadmanabhan, and A. Lips, Phys. Rev. Lett. 100 (2008) 138301.

3. Theoretical Model of Viscous Friction inside Steadily Sheared Foams and Concentrated Emulsions. S. Tcholakova, N.D. Denkov, K. Golemanov, K.P. Ananthapadmanabhan, A. Lips, Phys. Rev. E 78 (2008) 011405.

4. Surfactant Mixtures for Control of Bubble Surface Mobility in Foam Studies. K. Golemanov, N. D. Denkov, S. Tcholakova, M. Vethamuthu, and A. Lips, Langmuir 24 (2008) 9956–9961.

5. Instrument and Methods for Surface Dilatational Rheology Measurements. S. C. Russev, N. Alexandrov, K. G. Marinova, K. D. Danov, N. D. Denkov, L. Lyutov, V. Vulchev, and C. Bilke-Krause, Review of Scientific Instruments 79 (2008) 104102.

6. Chemical Physics of Colloid Systems and Interfaces. P. A. Kralchevsky, K. D. Danov and N. D. Denkov, Chapter 7 in Handbook of Surface and Colloid Chemistry (3rd Updated Edition; K. S. Birdi, Ed.). CRC Press, Boca Raton, FL, 2008.

7. Breakup of Bubbles and Drops in Steadily Sheared Foams and Concentrated Emulsions. K. Golemanov, S. Tcholakova, N. D. Denkov, K. P. Ananthapadmanabhan and A. Lips, Physical Review E 78 (2008) 051405.

8. Theoretical model of viscous friction inside steadily sheared foams and concentrated emulsions. N. D. Denkov, S. Tcholakova, K. Golemanov, T. Hu, and A. Lips, Amer. Inst. Physics Conference Proceedings, 2008, 1027, 902-904 .

 

2007

1. Emulsification in Turbulent Flow: 1. Mean and Maximum Drop Diameters in Inertial and Viscous Regimes. N. Vankova, S. Tcholakova, N. D. Denkov, I. B. Ivanov, V. D. Vulchev, T. Danner, J. Colloid Interface Sci. 312 (2007) 363-380.

2. Emulsification in Turbulent Flow: 2. Breakage Rate Constants. N. Vankova, S. Tcholakova, N. D. Denkov, V. D. Vulchev, T. Danner, J. Colloid Interface Sci. 313 (2007) 612-629.

3. Emulsification in turbulent flow: 3. Daughter drop-size distribution. S. Tcholakova, N. Vankova, N. D. Denkov, T. Danner, J. Colloid Interface Sci. 310 (2007) 570-589.

 

2006

1. Mass Transport in Micellar Surfactant Solutions: 1. Relaxation of Micelle Concentration, Aggregation Number and Polydispersity. K. D. Danov, P. A. Kralchevsky, N. D. Denkov, K. P. Ananthapadmanabhan, and A. Lips, Adv. Colloid Interface Sci. 119 (2006) 1-16.

2. Mass Transport in Micellar Surfactant Solutions: 2. Theoretical Modeling of Adsorption at a Quiescent Interface. K. D. Danov, P. A. Kralchevsky, N. D. Denkov, K. P. Ananthapadmanabhan, and A. Lips, Adv. Colloid Interface Sci. 119 (2006) 17-33.

3. 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.

4. Ivan B. Ivanov: Remarkable Figure in Colloid Science. P. A. Kralchevsky, and N. D. Denkov, Colloids Surf. A, 282-283 (2006) 1-7.

5. Foam-Wall Friction: Effect of Air Volume Fraction for Tangentially Immobile Bubble Surface. N. D. Denkov, S. Tcholakova, K. Golemanov, V. Subramanian, and A. Lips, Colloids Surf. A, 282-283 (2006) 329-347.

6. Effect of Thermal Treatment, Ionic Strength, and pH on the Short-Term and Long-Term Coalescence Stability of Beta-Lactoglobulin Emulsions. S. Tcholakova, N.D. Denkov, D. Sidzhakova, B. Campbell, Langmuir 22 (2006) 6042-6052.

7. Numerical Simulation and Experimental Study of Emulsification in a Narrow-Gap Homogenizer. H. Steiner, R. Teppner, G. Brenn, N. Vankova, S. Tcholakova, N.D. Denkov, Chemical Engineering Science 61 (2006) 5841-5855.

8. Antifoam Effects of Solid Particles, Oil Drops and Oil-Solid Compounds in Aqueous Foams. N.D. Denkov, K.G. Marinova, Chapter 10 in the book "Colloidal Particles at Liquid Interfaces" (B.P. Binks & T.S. Horozov, Eds.), Cambridge University Press, Cambridge, UK, 2006; pp. 383-444.

9. Globular Proteins as Emulsion Stabilizers: Similarities and Differences with Surfactants and Solid Particles. N.D. Denkov, S. Tcholakova, I.B. Ivanov, In the Proceedings of the 4th World Congress on Emulsions, Lyon, France, 2006; Plenary Lecture.

10. Kinetics of Drop Breakup During Emulsification in Turbulent Flow. S. Tcholakova, N. Vankova, N.D. Denkov, I.B. Ivanov, T. Danner, In the Proceedings of the 4th World Congress on Emulsions, Lyon, France, 2006; Paper No. 2.2-304.

11. Dynamics of Adsorption from Micellar Surfactant Solutions at Expanding Fluid Interfaces in Relation to the Emulsification Process. K.D. Danov, P.A. Kralchevsky, N.D. Denkov, K.P. Ananthapadmanabhan, A. Lips, In the Proceedings of the 4th World Congress on Emulsions, Lyon, France, 2006; Paper No. 2.1-376.

12. Coalescence Stability of Emulsions Containing Globular Milk Proteins, S. Tcholakova, N.D. Denkov, I.B. Ivanov, B. Campbell, Advances in Colloid & Interface Science 123-126 (2006) 259-293.

 

2005

1. Triblock Copolymers as Promoters of Solubilization of Oils in Aqueous Surfactant Solutions, P. A. Kralchevsky and N. D. Denkov, Chapter 15 in "Molecular Interfacial Phenomena of Polymers and Biopolymers" (Pu Chen, Editor), Woodhead Publishing, Cambridge, UK, 2005; pp. 538-579.

2. Effects of Electrolyte Concentration and pH on the Coalescence Stability of Beta-Lactoglobulin Emulsions: Experiment and Interpretation, S. Tcholakova, N. D. Denkov, D. Sidzhakova, I. B. Ivanov, B. Campbell, Langmuir 21 (2005) 4842-4855.

3. Wall Slip and Viscous Dissipation in Sheared Foams: Effect of Surface Mobility, N. D. Denkov, V. Subramanian, D. Gurovich and A. Lips, Colloids and Surfaces A 263(1-3) (2005) 129-145.

4. Hydrophobization of Glass Surface by Adsorption of Polydimethylsiloxane (PDMS), K. G. Marinova, D. Christova, S. Tcholakova, E. Efremov, N. D. Denkov, Langmuir 21 (2005) 11729-11737.

 

2004

1. Synergistic Sphere-to-Rod Micelle Transition in Mixed Solutions of Sodium Dodecyl Sulfate and Cocoamidopropyl Betaine. N. C. Christov, N. D. Denkov, P. A. Kralchevsky, K. P. Ananthapadmanabhan, A. Lips, Langmuir 20 (2004) 565-571.

2. Composition of Mixed Adsorption Layers and Micelles in Solutions of Sodium Dodecyl Sulfate and Dodecyl Acid Diethanol Amide. J. K. Angarska, K. D. Tachev, N. D. Denkov, Colloids & Surfaces A 233 (2004) 193-201.

3. Role of Surfactant Type and Concentration for the Mean Drop Size during Emulsification in Turbulent Flow. S. Tcholakova, N. D. Denkov, and T. Danner, Langmuir 20 (2004) 7444-7458.

4. Mechanisms of Foam Destruction by Oil-based Antifoams. N. D. Denkov Langmuir 20 (2004) 9463-9505

5. Evaluation of the Precision of Drop-Size Determination in Oil/Water Emulsions by Low-Resolution NMR Spectroscopy. P.S. Denkova, S. Tcholakova, N.D. Denkov, K. D. Danov, B. Campbell, C. Shawl, D. Kim, Langmuir 20 (2004) 11402-11413.

6. Main factors controlling the emulsification process under turbulent conditions. 2. Experiment and data interpretation. S. Tcholakova, N. D. Denkov, I. B. Ivanov, T. Danner, 21st ICTAM, Warsaw, 2004, Paper FM8S_11669

 

2003

1. Model Studies on the Mechanism of Deactivation (Exhaustion) of Mixed Oil-Silica Antifoams. K.G. Marinova, S. Tcholakova, N. D. Denkov, S. Roussev, and M. Deruelle, Langmuir 19 (2003) 3084-3089.

2. Interrelation between Drop Size and Protein Adsorption at Various Emulsification Conditions. S. Tcholakova, N. D. Denkov, D. Sidzhakova, I. B. Ivanov, and B. Campbell, Langmuir 19 (2003) 5640-5649.

3. Application of the Model-Free Approach to Low Molecular Weight Systems with Hindered Internal Rotation: Cinnamoylmesitylene. P.S. Denkova, V.S. Dimitrov, S.M. Bakalova, J. Kaneti, K.D. Danov, Magnetic Resonance in Chemistry 41 (2003) 989-995.

 

2002

1. Kinetics of Solubilization of n-Decane and Benzene by Micellar Solutions of Sodium Dodecyl Sulfate. P. D. Todorov, P. A. Kralchevsky, N. D. Denkov, G. Broze, and A. Mehreteab, J. Colloid Interface Sci. 245 (2002) 371-382.

2. Capillary Mechanisms in Membrane Emulsification: Oil-in-Water Emulsions Stabilized by Tween 20 and Milk Proteins. N. C. Christov, D. N. Ganchev, N. D. Vassileva, N. D. Denkov, K. D. Danov, and P. A. Kralchevsky, Colloids and Surfaces A 209 (2002) 83-104.

3. Kinetics of Triglyceride Solubilization by Micellar Solutions of Nonionic Surfactant and Triblock Copolymer: 1. The Empty and Swollen Micelles. N. C. Christov, N. D. Denkov, P. A. Kralchevsky, G. Broze, and A. Mehreteab, Langmuir 18 (2002) 7880-7886.

4. Kinetics of Triglyceride Solubilization by Micellar Solutions of Nonionic Surfactant and Triblock Copolymer: 2. Theoretical Model. P. A. Kralchevsky, N. D. Denkov, P. D. Todorov, G. S. Marinov, G. Broze, and A. Mehreteab, Langmuir 18 (2002) 7887-7895.

5. Kinetics of Triglyceride Solubilization by Micellar Solutions of Nonionic Surfactant and Triblock Copolymer: 3. Experiments with Single Drops. P. D. Todorov, G. S. Marinov, P. A. Kralchevsky, N. D. Denkov, P. Durbut, G. Broze, and A. Mehreteab, Langmuir 18 (2002) 7896-7905.

6. Optimal Hydrophobicity of Silica in Mixed Oil-Silica Antifoams. K.G. Marinova, N.D. Denkov, P. Branlard, Y. Giraud, M. Deruelle, Langmuir 18 (2002) 3399-3403.

7. Role of Oil Spreading for the Efficiency of Mixed Oil-Solid Antifoams. N.D. Denkov, S. Tcholakova, K.G. Marinova, A. Hadjiiski, Langmuir 18 (2002) 5810-5817.

8. Model Studies of the Effect of Silica Hydrophobicity on the Efficiency of Mixed Oil-Silica Antifoams. N.D. Denkov, K.G. Marinova, S. Tcholakova, M. Deruelle, Langmuir 18 (2002) 8761-8769.

9. Role of Entry Barriers in Foam Destruction by Oil Drops. A. Hadjiiski, N. D. Denkov, S. Tcholakova, I. B. Ivanov, In: "Adsorption and Aggregation of Surfactants in Solution", K. L. Mittal and D. O. Shah (Eds.), Marcel Dekker, New York, 2002, pp. 465-500.

10. Coalescence in Beta-Lactoglobulin-Stabilized Emulsions: Effects of Protein Adsorption and Drop Size. S. Tcholakova, N. D. Denkov, I. B. Ivanov, B. Campbell, Langmuir 18 (2002) 8960-8971.

11. Methods for Evaluation of Emulsion Stability at a Single Drop Level. N. D. Denkov, S. Tcholakova, I. B. Ivanov, B. Campbell, Proceedings of Third World Congress on Emulsions, September, 2002, Lyon, France.

12. Mechanism of Foam Destruction by Emulsions of PDMS-silica Mixtures. N. D. Denkov, K. Marinova, S. Tcholakova, M. Deruelle, Proceedings of Third World Congress on Emulsions, September, 2002, Lyon, France.

13. Coalescence in Protein Stabilized Emulsions. S. Tcholakova, N. D. Denkov, I. B. Ivanov, B. Campbell, Proceedings of Third World Congress on Emulsions, September, 2002, Lyon, France.

14. Chemical Physics of Colloid Systems and Interfaces: 1. Introduction; 2. Surface Tension of Surfactant Solutions; 3. Capillary Hydrostatics and Thermodynamics; 4. Surface Forces. P. A. Kralchevsky, K. D. Danov and N. D. Denkov, Chapter 5 in "Handbook of Surface and Colloid Chemistry", Second Edition (K. S. Birdi, Ed.), CRC Press, New York, 2002.

15. Chemical Physics of Colloid Systems and Interfaces: 5. Hydrodynamic Interactions in Dispersions; 6. Kinetics of Coagulation. P. A. Kralchevsky, K. D. Danov and N. D. Denkov, Chapter 5 in "Handbook of Surface and Colloid Chemistry", Second Edition (K. S. Birdi, Ed.), CRC Press, New York, 2002.

16. Chemical Physics of Colloid Systems and Interfaces: 7. Mechanisms of Antifoaming; 8. Electrokinetic Phenomena in Colloids; 9. Optical Properties of Dispersions and Micellar Solutions. P. A. Kralchevsky, K. D. Danov and N. D. Denkov, Chapter 5 in "Handbook of Surface and Colloid Chemistry", Second Edition (K. S. Birdi, Ed.), CRC Press, New York, 2002.

 

2001

1. Capillary Forces and Structuring in Layers of Colloid Particles. P.A. Kralchevsky and N.D. Denkov, Current Opinion in Colloid & Interface Sci. 6 (2001) 383-401.

2. Particles with an Undulated Contact Line at a Fluid Interface: Interaction between Capillary Quadrupoles and Rheology of Particulate Monolayers. P. A. Kralchevsky, N. D. Denkov, and K. D. Danov, Langmuir 17 (2001) 7694-7705.

3. Foam Destruction by Solid-Liquid Antifoams in Solutions of a Nonionic Surfactant: Electrostatic Interactions and Dynamic Effects. K.G. Marinova, N.D. Denkov, Langmuir 17 (2001) 2426-2436.

4. Van der Waals Interaction between Two Truncated Spheres Covered by a Uniform Layer (Deformed Drops, Vesicles, or Bubbles). S. Tcholakova, N. D. Denkov, R. Borwankar, B. Campbell, Langmuir 17 (2001) 2357-2362.

5. Effect of Oily Additives on Foamability and Foam Stability. 2. Entry Barriers. A. Hadjiiski, S. Tcholakova, N. D. Denkov, P. Durbut, G. Broze, A. Mehreteab, Langmuir 17 (2001) 7011-7021.

6. Effect of Oily Additives on Foamability and Foam Stability. 1. Role of Interfacial Properties. L. Arnaudov, N. D. Denkov, I. Surcheva, P. Durbut, G. Broze, A. Mehreteab, Langmuir 17 (2001) 6999-7010.

7. Foam Boosting by Amphiphilic Molecules in the Presence of Silicone Oil. E. S. Basheva, S. Stoyanov, N. D. Denkov, K. Kasuga, N. Satoh, K. Tsujii, Langmuir 17 (2001) 969-979.

8. Role of Betaine as Foam Booster in the Presence of Silicone Oil Drops. E. S. Basheva, D. Ganchev, N. D. Denkov, K. Kasuga, N. Satoh, K. Tsujii, Langmuir, 16(3) (2000) 1000-1013.

9. Role of Surface Diffusion for the Drainage and Hydrodynamic Stability of Thin Liquid Films. S. D. Stoyanov, N. D. Denkov, Langmuir 17 (2001) 1150-1156.

10. Dynamics of Particles on Interfaces and in Thin Liquid Films. J. T. Petkov, N. D. Denkov, In "Encyclopedia of Surface and Colloid Science", A. Hubbard, Ed.; Marcel Dekker, New York, 2001.

 

2000

1. Mechanisms of Action of Mixed Solid-Liquid Antifoams: 3. Exhaustion and Reactivation. N.D. Denkov, K.G. Marinova, C. Christova, A. Hadjiiski, Ph. Cooper, Langmuir 16 (2000) 2515-2528.

2. Antifoam Action of Oils. N.D. Denkov, K.G. Marinova, Proceedings of 3rd Eurofoam Conference, June, 2000, Delft, The Netherlands; Verlag MIT Publishing, Bremen, 2000, p. 199.

 

1999

1. Mechanisms of Action of Mixed Solid-Liquid Antifoams. 1. Dynamics of Foam Film Rupture. N. D. Denkov, P. Cooper, J.-Y. Martin, Langmuir 15 (1999) 8514-8529.

2. Mechanisms of Action of Mixed Solid-Liquid Antifoams. 2. Stability of Oil Bridges in Foam Films. N. D. Denkov, Langmuir 15 (1999) 8530-8542.

 

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. Modification of Ultrafiltration Membranes by Deposition of Colloid Particles. R. G. Alargova, J. T. Petkov, N. D. Denkov, D. N. Petsev and I. B. Ivanov, Colloids Surf. A 134 (1998) 331-342.

3. Electron Cryomicroscopy of Bacteriorhodopsin Vesicles: Mechanism of Vesicle Formation. N. D. Denkov, H. Yoshimura, T. Kouyama, J. Walz and K. Nagayama, Biophysical Journal 74 (1998) 1409-1420.

 

1997

1. DLVO and Non-DLVO Surface Forces and Interactions in Colloidal Dispersions. D. N. Petsev, N. D. Denkov, and P.A. Kralchevsky, J. Disp. Sci. Technol. 18 (1997) 647-659.

2. Effect of Droplet Deformability and Surface Forces on Flocculation. P. A. Kralchevsky, N. D. Denkov, K. D. Danov and D. N. Petsev, In: Proceedings of the 2nd World Congress on Emulsions (Paper 2-2-150), Bordeaux, September 1997.

3. Charge of Emulsion Droplets Covered with Nonionic Surfactants. I. B. Ivanov, K. G. Marinova, R. G. Alargova, N. D. Denkov, R. P. Borwankar, In: Proceedings of the 2nd World Congress on Emulsions, Paper 2-2-149 (1997).

4. Lateral Capillary Forces and Two-dimensional Arrays of Colloid Particles and Protein Molecules. N. D. Denkov, P. A. Kralchevsky, and I. B. Ivanov, J. Dispersion Sci. Technology 18 (1997) 577-591.

 

1996

1. Charging of Oil-Water Interfaces Due to Spontaneous Adsorption of Hydroxyl Ions. K.G. Marinova, R.G. Alargova, N.D. Denkov, O.D. Velev, D.N. Petsev, I.B. Ivanov, R.P. Borwankar, Langmuir 12 (1996) 2045-2051.

2. Film Trapping Technique: Precise Method for Three-Phase Contact Angle Determination of Solid and Fluid Particles of Micrometer Size. A. Hadjiiski, R. Dimova, N. D. Denkov, I. B. Ivanov, and R. Borwankar, Langmuir 12 (1996) 6665-6675.

3. Precise Method for Measuring the Shear Surface Viscosity of Surfactant Monolayers. J. T. Petkov, K. D. Danov, N. D. Denkov, R. Aust and F. Durst, Langmuir 12 (1996) 2650-2653.

4. Method for Controlled Formation of Vitrified Films for Cryo-Electron Microscopy. N. D. Denkov, H. Yoshimura and K. Nagayama, Ultramicroscopy 65 (1996) 147-158.

5. Nanoparticle Arrays in Freely Suspended Vitrified Films. N. D. Denkov, H. Yoshimura, K. Nagayama, T. Kouyama, Physical Review Letters 76 (1996) 2354-2357.

 

1995

1. Analytical Expression for the Oscillatory Structural Surface Force. P. A. Kralchevsky and N. D. Denkov, Chem. Phys. Letters 240 (1995) 385-392.

2. Flocculation of Deformable Emulsion Droplets. I. Droplet Shape and Line Tension Effects. N. D. Denkov, D. N. Petsev, K. D. Danov, J. Colloid Interface Sci. 176 (1995) 189-200.

3. Measurement of the Drag Coefficient of Spherical Particles Attached to Fluid Interfaces. J. T. Petkov, N. D. Denkov, K. D. Danov, O. D. Velev, R. Aust, F. Durst, J. Colloid Interface Sci. 172 (1995) 147-154.

4. Flocculation of Deformable Emulsion Droplets: II. Interaction Energy. D. N. Petsev, N. D. Denkov and P. A. Kralchevsky, J. Colloid Interface Sci. 176 (1995) 201-213.

5. Stresses in Lipid Membranes and Interactions between Inclusions. P. A. Kralchevsky, V. N. Paunov, N. D. Denkov, K. Nagayama, J. Chem. Soc.: Faraday Trans., 91(19) (1995) 3415-3432.

6. Lateral Capillary Forces between colloidal Particles Incorporated in Liquid Films or Lipid Bilayers. P. A. Kralchevsky, C. D. Dushkin, V. N. Paunov, N. D. Denkov, K. Nagayama, Progr. Colloid Polymer Sci. 98 (1995) 12-17.

7. Colloid Structural Surface Forces in Thin Liquid Films. N. D. Denkov, P. A. Kralchevsky, Prog. Colloid Polymer Sci. 98 (1995) 18-22.

 

1994

1. Capillary Image Forces: I. Theory. P. A. Kralchevsky, V. N. Paunov, N. D. Denkov and K. Nagayama, J. Colloid Interface Sci. 167 (1994) 47-65.

2. Capillary Image Forces: II. Experiment. O.D. Velev, N.D. Denkov, V.N. Paunov, P.A. Kralchevsky, K. Nagayama, J. Colloid Interface Sci. 167 (1994) 66-73.

3. Formation of Two-dimensional Structures from Colloidal Particles on Fluorinated Oil Substrate. G. S. Lazarov, N. D. Denkov, O. D. Velev, P. A. Kralchevsky and Kuniaki Nagayama, J. Chem. Soc. Faraday Trans. 90 (1994) 2077-2083.

4. Formation of Two-dimensional Colloid Crystals in Liquid Films under the Action of Capillary Forces. P. A. Kralchevsky, N. D. Denkov, V. N. Paunov, O. D. Velev, I. B. Ivanov, H. Yoshimura, K. Nagayama, J. Phys.: Condens. Matter, 6 (1994) A395-A402.

 

1993

1. Energetical and Force Approaches to the Capillary Interactions Between Particles Attached to a Liquid-Fluid Interface. P. A. Kralchevsky, V. N. Paunov, N. D. Denkov, I. B. Ivanov and K. Nagayama, J. Colloid Interface Sci., 155 (1993) 420-437.

2. Lateral Capillary Forces Between Floating Submillimeter Particles. V. N. Paunov, P. A. Kralchevsky, N. D. Denkov and K. Nagayama, J. Colloid Interface Sci. 157 (1993) 100-112.

3. Adsorption from Surfactant Solutions under Diffusion Control. P. A. Kralchevsky, Y. S. Radkov and N. D. Denkov, J. Colloid Interface Sci. 161 (1993) 361-365.

4. Coalescence Dynamics of Deformable Brownian Emulsion Droplets. K. D. Danov, N. D. Denkov, D. N. Petsev, I. B. Ivanov and R. Borwankar, Langmuir 9 (1993) 1731-1740.

5. Interaction between Deformable Brownian Droplets. N. D. Denkov, D. N. Petsev, K. D. Danov, Phys. Rev. Lett. 71 (1993) 3226-3229.

6. Pair Interaction Energy between Deformable Drops and Bubbles. K. D. Danov, D. N. Petsev, N. D. Denkov, R. Borwankar, J. Chem. Phys. 99 (1993) 7179-7189.

7. Direct Measurement of Lateral Capillary Forces. O. D. Velev, N. D. Denkov, V. N. Paunov, P. A. Kralchevsky and K. Nagayama, Langmuir 9 (1993) 3702-3709.

8. Diffusion and Light Scattering in Dispersions of Charged Particles with Thin Electrical Double Layers. D. N Petsev, N. D. Denkov, K. Nagayama, Chemical Physics 175 (1993) 265-270.

9. Two-Dimensional Crystallization. N.D. Denkov, O.D. Velev, P.A. Kralchevsky, I.B. Ivanov, H. Yoshimura, K. Nagayama, Nature 361 (1993) 26.

10. Investigation on the Mechanisms of Stabilization of Food Emulsions by Vegetable Proteins. O. D. Velev, A. D. Nikolov, N. D. Denkov, G. Doxastakis, V. Kiosseoglu, G. Stalidis, Food Hydrocolloids, 7 (1993) 55-71.

11. Droplet Interactions and Coalescence in Emulsions. K.D. Danov, N.D. Denkov, D.N. Petsev, I.B. Ivanov and R.P. Borwankar, Proc. First World Congress on Emulsions, Paris, 1993.

 

1992

1. Mechanism of Formation of Two-Dimensional Crystals from Latex Particles on Substrates. N. D. Denkov, O. D. Velev, P. A. Kralchevsky, I. B. Ivanov, H. Yoshimura and K. Nagayama, Langmuir 8 (1992) 3183-3190.

2. Capillary Meniscus Interaction between a Microparticle and a Wall. V. N. Paunov, P. A. Kralchevsky, N. D. Denkov, I. B. Ivanov and K. Nagayama, Colloids and Surfaces 67 (1992) 119-138.

3. Interfacial Properties and Emulsion Stability in Fluorinated Oil - Non-Fluorinated Oil - Surfactant(s) Systems. M. Morita, M. Matsumoto, S. Usui, T. Abe, N. Denkov, O. Velev, I. B. Ivanov, Colloids and Surfaces 67 (1992) 81-93.

4. Contact Angle, Film and Line Tension of Foam Films. I. Stationary and Dynamic Contact Angle Measurements. I.B. Ivanov, A.S. Dimitrov, A.D. Nikolov, N.D. Denkov and P.A. Kralchevsky, J. Colloid Interface Sci. 151 (1992) 446-461.

5. A Possible Mechanism of Stabilization of Emulsions with Solid Particles. N.D. Denkov, I. B. Ivanov, P.A. Kralchevsky, D.T. Wasan, J. Colloid Interface Sci. 150 (1992) 589-593.

6. Diffusion and Light Scattering in Suspension of Strongly Charged Particles. N. D. Denkov, D. N. Petsev, Physica A 183 (1992) 462.

7. Diffusion of Charged Colloidal Particles at Low Volume Fraction: Theoretical Model and Light Scattering Experiments. D. N. Petsev, N. D. Denkov, J. Colloid Interface Sci. 149 (1992) 329.

 

1991

1. Effect of Droplet Deformation on the Interactions in Microemulsions. N.D. Denkov, P.A. Kralchevsky, I.B. Ivanov, C.S. Vassilieff, J. Colloid Interface Sci. 143 (1991) 157-173.

 

1990

1. Attraction between Brownian Particles of Identical Charge in Colloid Crystals. P. A. Kralchevsky, N. D. Denkov, I. B. Ivanov and A. D. Nikolov, Chem. Phys. Letters 166 (1990) 452-458.

2. Drainage of Foam Films in the Presence of Nonionic Micelles. A.D. Nikolov, D.T. Wasan, N.D. Denkov, P.A. Kralchevsky, I.B. Ivanov, Progress in Colloid and Polymer Science 82 (1990) 87-98.

3. Reply to the letter by Derjaguin and Churaev. I.B. Ivanov, A.D. Nikolov, P.A. Kralchevsky, N.D. Denkov, J. Colloid and Interface Sci. 134 (1990) 294-296.