On the applicability of certain approximations of the Lifshitz theory to thin films |
| |
| Authors: | S Nir R Rein L Weiss |
| |
| Affiliation: | 1. Department of Experimental Pathology, Roswell Park Memorial Institute, Buffalo, N.Y. 14203, U.S.A.;2. Center for Theoretical Biology, State University of New York at Buffalo, Amherst, N.Y. 14226, U.S.A.;1. W. K. Kellogg Biological Station, Michigan State University, Hickory Corners, MI 49060, USA;2. Department of Agronomy, University of Wisconsin-Madison, Madison, WI 53706, USA;3. Department of Biology, University of Nebraska at Omaha, Omaha, NE 68182, USA;4. Program in Plant Biology and Conservation, Biological Sciences, Weinberg College of Arts and Sciences, Northwestern University, Evanston, IL 60208, USA;5. Plant Biology Department and Graduate Program in Ecology, Evolution and Behavioral Biology, Michigan State University, East Lansing, MI 48824, USA;1. Department of Physics, S. D. College, Ambala Cantt., 133 001, India;2. Department of Physics, Kurukshetra University, Kurukshetra, 136 119, India |
| |
| Abstract: | In an attempt to evaluate the attractive interaction energies between cells, the van der Waals forces between two semi-infinite media composed of substance A and separated by a thin film of substance B are considered on the basis of the Lifshitz theory. An improved approximation is proposed, whereby some previously neglected terms are included in the final expression for forces and interaction energies. The symmetry behavior of forces under interchan e of media is treated. Numerical investigations show that the proposed corrections become important in certain situations.The problem of a correct representation of dielectric coefficients for biological systems for the purpose of calculating dispersion forces is also discussed. A proposed representation of dielectric permeability for the case of liquid water is shown to well represent experimental data. Calculations of the van der Waals forces with the improved representation of dielectric permeabilities for a water-hydrocarbon system show significant changes from previously obtained results. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
