SC10 George Kaptay

Short Course on

“Interfacial Forces, Energies and Phenomena”
by George Kaptay

10:00 – 10:30 Registration
10:30 – 11:30 Session 1. Basics. Thermodynamic and mechanical definition of interfacial energy (tension). The Gibbs energy of phases taking into account the effect of interfaces + its consequences: equilibrium shape, equilibrium size, interface restructuring, adsorption, segregation. Nano-phase-rule, nano-phase-equilibria.
11:30 – 11:45 Coffee break
11:45 – 12:45 Session 2. Forces. General equation for interfacial forces. The interfacial anti-stretching force (Young). The curvature induced interfacial force (Laplace).  The interfacial gradient force (Young- Goldstein-Block). The interfacial spreading force (Marangoni). The interfacial capillary force (Young-Laplace). The interfacial meniscus force (Nicolson). The fluid (liquid or gaseous) bridge induced interfacial force (Naidich). The interfacial adhesion force (Hamaker, Derjaugin).
12:45 – 14:00 Lunch break (lunch not included)
14:00 – 15:00 Session 3. Energies. Simplified models for interfacial energies (molar surface area, interfacial excess enthalpy and entropy). Application to liquid/vapour, solid/vapour, liquid/liquid, solid/liquid interfaces. The Gibbs approach and the Butler approach to the concentration dependence of interfacial energies. Segregation and surface phase transition. Surface phase transition, effect on Marangoni convection.
15:00 – 15:15 Coffee break
15:15 – 16:15 Session 4. Phenomena. The critical size of detaching bubbles, droplets and particles from interfaces. Introduction of particles into liquids (static and dynamic conditions). Penetration of liquids into porous solids (threshold pressure, threshold contact angle). Superhydrophobicity. Stabilization of foams and emulsions by solid particles. Other phenomena upon request of the attendees. Summary


Copies and CD of all slides in the PowerPoint format will be provided at the beginning of the SC.


Dr. George Kaptay (51) is a former professor and head of Department of Physical Chemistry and the present part-time professor and head of the Department of Nanotechnology at the University of Miskolc, Hungary. Dr. Kaptay is also the founding director and presently the scientific vice director and head of Department of Nano-materials of the BAY research institute within the campus of the University of Miskolc, Hungary.

Dr Kaptay holds MSc and PhD degrees in metallurgical engineering (Leningrad, Russia) and a DSc degree in Interfacial Phenomena (Academy of Sciences, Budapest, Hungary). His research interests include interfacial phenomena, chemical thermodynamics, electrochemical synthesis, nanotechnology, transport phenomena. He has authored more than 250 papers, received more than 800 independent citations. He served as visiting professor at the University of Alabama (Tuscaloosa, USA), Kyushu Institute of Technology (, Kyushu, Japan) and Swinburne University of Technology (Melbourne, Australia). Earlier versions of a similar course were presented by him at Kyushu (2004), Melbourne (2007) and at the EUROMAT conferences in Prague (2005) and Glasgow (2009).