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Elastic Analysis of Physisorption-Induced Substrate Deformation |
| ZHANG Ji-Qiao;PAN Xia-Hui;YU Shou-Wen;FENG Xi-Qiao |
| FML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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ZHANG Ji-Qiao, PAN Xia-Hui, YU Shou-Wen et al 2008 Chin. Phys. Lett. 25 205-208 |
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Abstract Physisorption may cause a dimple on a deformable solid surface due to adsorbate--substrate interaction. The interactive force between the adsorbate and the crystal atoms depends on their distances, which may change with substrate deformation. This feature of displacement-dependence indicates that the equilibrium problem is a force-deformation coupled nonlinear procedure. In the present study, a continuum mechanics model, in which the force is considered as a function of the displacement field of the medium, is presented to calculate the physisorption-induced deformation in a
semi-infinite elastic medium. It is found that the nonlinear effect due to force-deformation coupling should be taken in consideration in the adsorbate--substrate interaction analysis.
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| Keywords:
61.20.Ja
68.35.Bs
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Received: 03 October 2007
Published: 27 December 2007
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