Dr Rossen Sedev
Contact Details
Tel: +61 8 8302 3225
Fax: +61 8 8302 3683
Email: rossen.sedev@unisa.edu.au
Position
Senior Research Fellow
Qualifications
MSc PhD Sofia, Bulgaria
Background
Rossen completed his PhD in physical and colloid chemistry with J.G. Petrov in Sofia (Bulgaria), studying the transition form steady-state wetting to film entrainment. He has spent several years at the Institute of Physical Chemistry (Sofia), working with D. Exerowa, studying the surface forces in foam films. He has spent periods at the University of Toronto (with A.W. Neumann), researching contact angles and surface energetics, and at the Technical University Berlin (with G.H. Findenegg), studying Gibbs layers of polymeric surfactants with ellipsometry and neutron reflectivity.
Rossen joined the Ian Wark Research Institute in 2000 as a Research
Fellow. His current research encompasses the wettability of rough and patterned surfaces, electrowetting, surfactant and polymer adsorption, and foam stability.
Research Interests
Contact angles & Surface energetics
Wettability of rough & heterogeneous surfaces
Surface forces in foam films
Polymers at interfaces
Wetting kinetics & Film entrainment
Kinetics of surfactant adsorption
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
M. Fabretto, R. Sedev, and J. Ralston Advancing, Receding, and Vibrated Contact Angles on Rough Hydrophobic Surfaces Contact Angle, Wettability and Adhesion (K.L. Mittal, Ed.) 3 (2003) 161-73.
N. Stevens, C.I. Priest, R. Sedev, and J. Ralston Wettability of Photoresponsive Titanium Dioxide Surfaces Langmuir 19 (2003) 3272-5.
A. Quinn, R. Sedev, J. Ralston Influence of the Electrical Double Layer in Electrowetting J. Phys. Chem. B 107 (2003) 1163-9.
R. Sedev, R. Steitz, G.H. Findenegg The Structure of PEO-PPO-PEO Triblock Copolymers at the Water/Air Interface Physica B: Condens. Matter 315 (2002) 267-72.
R. Sedev Limiting Area per Molecule of Nonionic Surfactants at the Water/Air Interface Langmuir 17 (2001) 562-4.
R. Sedev, D. Exerowa, G.H. Findenegg PEO-PPO-PEO Triblock Copolymers at the Water/Air Interface and in Foam Films Colloid Polym. Sci. 278 (2000) 119-23.
R. Sedev, B. Jachimska, Khr. Khristov, K. Malysa, D. Exerowa Foamability of PEO-PPO-PEO Triblock Copolymers (P85 and F108) and Role of the Foam Films J. Dispersion Sci. Technol. 20 (1999) 1759-76.
R. Sedev, D. Exerowa DLVO and Non-DLVO Surface Forces in Foam Films from Amphiphilic Block Copolymers Adv. Colloid Interface Sci. 83 (1999) 111-36.
R.V. Sedev, J.G. Petrov, A.W. Neumann Effect of Swelling of a Polymer Surface on Advancing and Receding Contact Angles J. Colloid Interface Sci. 180 (1996) 36-42.