Thermal undulations in salt-free charged lamellar phases: Theory versus experiment | Zendy

Renko de Vries | Zendy

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Thermal undulations in salt-free charged lamellar phases: Theory versus experiment

Author(s) -

Renko de Vries

Publication year - 1997

Publication title -

physical review. e, statistical physics, plasmas, fluids, and related interdisciplinary topics

Language(s) - English

Resource type - Journals

eISSN - 1095-3787

pISSN - 1063-651X

DOI - 10.1103/physreve.56.1879

Subject(s) - lamellar structure , lamellar phase , membrane , pulmonary surfactant , poisson–boltzmann equation , scattering , electrostatics , thermal , phase (matter) , chemical physics , materials science , thermodynamics , chemistry , physics , optics , ion , crystallography , organic chemistry , biochemistry

The interplay between thermal undulations and electrostatic repulsion is investigated theoretically for saltfree lamellar phases of charged fluid membranes. The electrostatics of the undulating charged membranes is dealt with in the nonlinear Poisson-Boltzmann approximation. A harmonic undulation theory is formulated that accounts quantitatively for the shift of the Bragg peak that has recently been observed in light-scattering experiments on the dilute lamellar phase of the nonionic surfactant n-dodecyl pentaethylene glycol ether, to which small amounts of the ionic surfactant sodium dodecyl sulphate were added. @S1063-651X~97!13207-X#

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