Difference between revisions of "Films Stabilized by Long-Range Forces"
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==[[Results]]== | ==[[Results]]== | ||
Figure 1 illustrates a film thickness on a semi-infinite substrate. The surface tension of the film is taken to be isotropic and the stress in the film results from the difference of the film and the substrate. The model is based on a stability analysis. | Figure 1 illustrates a film thickness on a semi-infinite substrate. The surface tension of the film is taken to be isotropic and the stress in the film results from the difference of the film and the substrate. The model is based on a stability analysis. | ||
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==[[Discussion]]== | ==[[Discussion]]== | ||
We can know from this paper that long-range interactions can stabilize epitaxial films against stress. Dispersion forces can compete with the stress in thin films. We can know the dependence of the transition thickness on stress in the presence of the long-range forces. | We can know from this paper that long-range interactions can stabilize epitaxial films against stress. Dispersion forces can compete with the stress in thin films. We can know the dependence of the transition thickness on stress in the presence of the long-range forces. |
Revision as of 12:43, 18 April 2012
Original entry by Hyerim Hwang, AP 226, Spring 2012. not finished
Reference
Zhigang Suo and Zhenyu Zhang, "Epitaxial Films Stabilzed by Long-Range Forces", Physical Review B 1998 58, 5116-5120
Keywords
Dynamic forces, Colloidal suspensions, Interfacial deformation, Static surface forces
Introduction
Stability of an epitaxial film on a substrate of a different material is determined by the competition between surface tension and stress. This paper presents that thermodynamic driving forces of different physical origins which act over longer ranges than atomic length, can be strong. It shows that dispersion forces compete with the stress in thin films and the electrons in a metal film mediates a long-ranged force which can stabilize metal films of atomic layers.
Results
Figure 1 illustrates a film thickness on a semi-infinite substrate. The surface tension of the film is taken to be isotropic and the stress in the film results from the difference of the film and the substrate. The model is based on a stability analysis.
Discussion
We can know from this paper that long-range interactions can stabilize epitaxial films against stress. Dispersion forces can compete with the stress in thin films. We can know the dependence of the transition thickness on stress in the presence of the long-range forces.