Nonsingular van der Waals Potentials for Nonconducting Condensed Bodies

✍ Scribed by J.X. Lu; W.H. Marlow; V. Arunachalam

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 242 KB
• Volume: 181
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0400

✦ Synopsis

on interplate separation as the nonretarded many-body Lif-Nonsingular van der Waals potentials are developed, from the shitz potential. The same is true for two rigid spheres at newly established nonsingular intermolecular interactions by two small enough intersurface separations. The more realistic of the present authors, for the following cases: two half spaces, and currently widely used many-body potentials are due to two macroscopic spheres, a macroscopic sphere and a half space, Lifshitz (6), Langbein (7), and others (for a list of other a molecule and a half space, and a molecule and a sphere. Incluauthors, see ( 4)). Loosely speaking, many-body effects are sion of a repulsive exponential-decay (Born) potential to each of due to the fluctuation and induction correlations of molecules the above attractive potentials is also discussed. In particular, or elementary interacting species within each condensed calculations of cohesion and adhesion energies for two slabs have body and between two interacting condensed bodies. Even been performed for systems whose accurate Hamaker-Lifshitz constants and experimental surface and interfacial tensions are for the many-body Lifshitz potentials, one is still apart from available. Agreement is good for each of these systems. ᭧ 1996 reality. We have assumed that the condensed bodies have Academic Press, Inc.

fixed shapes and sizes and that they suffer no distortion in Key Words: nonsingular van der Waals potentials; adhesion enshape and no change in surface structure even when they ergy.

are in very close proximity. For both the two-body Hamaker potential and the many-body Lifshitz potential, the constituent molecules of the condensed bodies are assumed as point distribution for the polarizability density and showed that