Hamaker Constants of Systems Involving Water Obtained from a Dielectric Function That Fulfills the f Sum Rule
✍ Scribed by José M. Fernández-Varea; Rafael Garcia-Molina
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 59 KB
- Volume
- 231
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
NOTE Hamaker Constants of Systems Involving Water Obtained from a Dielectric Function That Fulfills the f Sum Rule Hamaker constants of systems involving liquid water are evaluated, within the full Lifshitz theory, by means of a recently proposed model of the dielectric function of this substance [Dingfelder et al., Radiat. Phys. Chem. 53, 1 (1998)], which has been extended in the present work by including terms corresponding to infrared excitations and microwave relaxation. An important feature of the complete model is that, besides a good fit to experimental data, it satisfies the physical constraint provided by the f sum rule. For symmetrical systems interacting across water, calculated Hamaker constants are generally in good agreement with results obtained using the Ninham-Parsegian representation with the Roth and Lenhoff parameters for water.