Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Wetting, Superamphiophobicity, Micro- and Nanofluidics I

CPP 18.1: Vortrag

Dienstag, 1. April 2014, 09:30–09:45, ZEU 222

A liquid-vapor interface at equilibrium in the vicinity of structured substrates: a mean-field approach — •Nikita Tretyakov, Burkhard Dünweg, and Kostas Daoulas — Max Planck Institute for Polymer Research, Mainz, Germany

We study static properties of a liquid-vapor interface in the vicinity of structured substrates employing a mean-field approach [1]. As opposed to the particle-based simulations [2], this is a continuum method based on thermodynamics and statistical physics. To this end, the Hamiltonian of the system is written to account for the bulk phases, the interface [3] and the interaction with the solid. The model is then proved by a series of case-studies. Later on, we use different geometries of the substrate to investigate the interface' response to external pressure and support our simulations with analytical results.

[1] K. M. Hong and J. Noolandi, "Theory of inhomogeneous multicomponent polymer systems", Macromolecules, vol. 14, no. 3, pp. 727-736, 1981.

[2] N. Tretyakov and M. Müller, "Correlation between surface topography and slippage: a molec- ular dynamics study", Soft Matter, vol. 9, pp. 3613-3623, 2013.

[3] K. R. Mecke and S. Dietrich, "Effective hamiltonian for liquid-vapor interfaces", Phys. Rev. E, vol. 59, pp. 6766-6784, 1999.