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Effective refractive index and intermolecular forces associated with a phase of functional groups
Authors:Preeti S Yadav  Rafael Tadmor  Jennifer Shim Park
Institution:a Department of Chemical Engineering, Lamar University, Rm 101, Lucas Engineering, M.L.K. Jr. Pkwy., Beaumont, TX-77710, United States
b Department of Chemistry and Biochemistry, University of California, San Diego
c Department of Biotechnology and Environmental Engineering, Ben Gurion University of the Negev, Beer Sheva, Israel
Abstract:Cases in which a functional groups form distinct phases are known in material science in general and specifically in polymer and surfactant sciences. To calculate the van der Waals forces associated with such phases there is a need to evaluate the refractive index of those phases. We expand and generalize a method to estimate the refractive index of such ‘functional group phase’ and discuss how to use the refractive indices to calculate the interaction energies associated with such functional group phases and thereby modify the total theoretically calculated van der Waals forces.
Keywords:Interaction energies  Additional attraction  Van der Waals forces  Surfactant modified surfaces  Force law  Methyl group  Derjaguin approximation  Functional group
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