Issue |
EPL
Volume 103, Number 6, September 2013
|
|
---|---|---|
Article Number | 66003 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
DOI | https://doi.org/10.1209/0295-5075/103/66003 | |
Published online | 22 October 2013 |
Phase separation in thin films: Effect of temperature gradients
1 Institut für Physik, Johannes Gutenberg - Universität Mainz - Staudinger Weg 7, D-55099 Mainz, Germany, EU
2 School of Physical Sciences, Jawaharlal Nehru University - New Delhi-110067, India
Received: 1 July 2013
Accepted: 18 September 2013
We study the phase-separation kinetics of a binary (AB) mixture confined in a thin film of thickness D with a temperature gradient. Starting from a Kawasaki-exchange kinetic Ising model, we use a master-equation approach to systematically derive an extension of the Cahn-Hilliard model for this system. We study the effect of temperature gradients perpendicular to the film with “neutral” (no preference for either A or B) surfaces. We highlight the rich phenomenology and pattern dynamics which arises from the interplay of phase separation and the temperature gradient.
PACS: 64.75.Gh – Phase separation and segregation in model systems (hard spheres, Lennard-Jones, etc.) / 64.75.St – Phase separation and segregation in thin films / 68.35.Rh – Phase transitions and critical phenomena
© EPLA, 2013
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