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Associate Professor Rossen Sedev

Rossen SedevContact Details
Tel: +61 8 8302 3225
Fax: +61 8 8302 3683
Email: rossen.sedev@unisa.edu.au

Associate Research Professor

MSc Chemistry (Inorganic & Analytical), University of Sofia, Bulgaria
PhD Physical Chemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria

Rossen obtained his PhD in Physical Chemistry from the Bulgarian Academy of Sciences, Sofia in 1994. His research interests include wettability of non-ideal surfaces (rough, heterogeneous and structured), wettability under applied potential (electrowetting), wettability of porous media, wettability of oxides and wetting dynamics, interfacial and electrochemical behavior of ionic liquids, surface forces and surfactants, colloidal systems (foams, emulsions, bubbles and particles). He has co-authored about 90 refereed publications with a total of 1200 citations. Rossen joined The Wark at UniSA in 2000. Previous appointments include Humboldt Research Fellow, Iwan N. Stranski Institute of Physical and Theoretical Chemistry, Technical University Berlin (1998-2000); Research Associate, Institute of Physical Chemistry, Sofia (1993-1998); Research Associate, Central Laboratory of Mineral Processing, Sofia (1991-1993; 1988-1990); Visiting Scholar, Department of Mechanical Engineering, University of Toronto (1990-91).

Rossen is an active reviewer for leading scholarly journals and research funding agencies; Guest editor of Advances in Colloid & Interface Science (2011); Member of the Organizing Committee of the Symposium Particles, Drops & Bubbles, Pacifichem, Honolulu, 2010; Secretary of the 9th International Conference on Surface and Colloid Science, Sofia, 1997. He is a member of the International Association of Colloid and Interface Scientists, the German Colloid Society, the American Chemical Society and the Royal Society of Chemistry.

Research Interests
Contact angles and surface energetics
Wettability of rough and heterogeneous surfaces
Surface forces in foam films
Polymers at interfaces
Wetting kinetics and film entrainment
Kinetics of surfactant adsorption

Supervisor - Available Postgraduate/Honours Projects
The shape and movement of fluid interfaces inside a porous medium (P)
Advanced coating of heterogeneous surfaces with complex fluids (H)
Amphiphilic block copolymers at the solid/liquid interface (H)
Designed surfaces of controlled wettability (H)
Electrowetting of responsive surfaces (H)
Foamability and dynamic surface tension of polymeric surfactant (H)
Molecular surface design: Light induced wettability of structured surfaces (H)
Thin film stability and nanostructured surface (H)
Wetting and coating of heterogeneous surfaces with complex fluids (H)

Surface Science: Introductory Lecture 1 - Surfaces, colloids and capillarity (PDF 2249kb)
Surface Science: Introductory Lecture 4 - Surface forces, colloid stability and wetting (PDF 620kb)
Wetting, spreading and adhesion Lecture 1 - Capillarity: Static considerations (PDF 521kb)
Wetting, spreading and adhesion Lecture 2 - Capillarity: Measurements (PDF 321kb)
Wetting, spreading and adhesion Lecture 3 - Theory of contact angles (PDF 325kb)
Wetting, spreading and adhesion Lecture 4 - Dynamic contact angles (PDF 461kb)

Selected Publications

R. Sedev 'Electrowetting: Electrocapillarity, Saturation, and Dynamics' Eur. Phys. J. Spec. Top. 197 (2011) 307-19.
M. Ramiasa, J. Ralston, R. Fetzer, and R. Sedev 'Contact Line Friction in Liquid-Liquid Displacement on Hydrophobic Surfaces' J. Phys. Chem. C 115 (2011) 24975-86.
R. Sedev 'Surface Tension, Interfacial Tension and Contact Angles of Ionic Liquids' Curr. Opin. Colloid Interface Sci. 16 (2011)310-6.
H. Li, R. Sedev, and J. Ralston 'Dynamic Wetting of a Fluoropolymer Surface by Ionic Liquids' Phys. Chem. Chem. Phys. 13 (2011) 3952-9.
C. Priest, J. Zhou, R. Sedev, J. Ralston, A. Aota, K. Mawatari, and T. Kitamori 'Microfluidic Extraction of Copper from Particle-Laden Solutions' Int. J. Miner. Process. 98 (2011) 168-73.
V. Lockett, R. Sedev, S. Harmer, J. Ralston, M. Horne, and T. Rodopoulos 'Orientation and Mutual Location of Ions at the Surface of Ionic Liquids' Phys. Chem. Chem. Phys. 12 (2010) 13816-27.
P. Forsberg, C. Priest, M. Brinkmann, R. Sedev, and J. Ralston 'Contact Line Pinning on Microstructured Surfaces for Liquids in the Wenzel State' Langmuir 26 (2010) 860-5.
M. Paneru, C. Priest, R. Sedev, and J. Ralston 'Electrowetting of Aqueous Solutions of Ionic Liquid in Solid-Liquid-Liquid Systems' J. Phys. Chem. C 114 (2010) 8383-8.
M. Paneru, C. Priest, R. Sedev, and J. Ralston 'Static and Dynamic Electrowetting of an Ionic Liquid in a Solid/Liquid/Liquid System' J. Am. Chem. Soc. 132 (2010) 8301-8.
V. Lockett, M. Horne, R. Sedev, T. Rodopoulos, and J. Ralston 'Differential Capacitance of the Double Layer at the Electrode/Ionic Liquids Interface' Phys. Chem. Chem. Phys. 12 (2010) 12499-512.