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Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 559454
Title Elastic properties of symmetric liquid-liquid interfaces
Author(s) Varadharajan, Ramanathan; Leermakers, Frans A.M.
Source Physical Review. E, Statistical nonlinear, and soft matter physics 100 (2019)6. - ISSN 2470-0045
Department(s) Physical Chemistry and Soft Matter
Publication type Refereed Article in a scientific journal
Publication year 2019

The mean (κ) and Gaussian (κ) bending rigidities of liquid-liquid interfaces, of importance for shape fluctuations and topology of interfaces, respectively, are not yet established: Even their signs are debated. Using the Scheutjens Fleer variant of the self-consistent field theory, we implemented a model for a symmetric L-L interface and obtained high-precision (mean-field) results in the grand-canonical (μ,V,T) ensemble. We report positive values for both moduli when the system is close to critical where the rigidities show the same scaling behavior as the interfacial tension γ. At strong segregation, when the interfacial width becomes of the order of the segment size, κ turns negative. The length scale λκ/γ remains of the order of segment size for all strengths of interaction; yet the 1/N chain length correction reduces λ significantly when the chain length N is small.

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