Consistent definitions of "the interface" in surfactant-free micellar aggregates

Schoettl, Sebastian and Touraud, Didier and Kunz, Werner and Zemb, Thomas and Horinek, Dominik (2015) Consistent definitions of "the interface" in surfactant-free micellar aggregates. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 480. pp. 222-227. ISSN 0927-7757, 1873-4359

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Abstract

The theoretical description of systems with soft interfaces requires a precise definition of the interfaces that are present. Such definitions are common for interfaces of simple liquids and for surfactant assemblies like micelles, membranes, and microemulsions. Here, we focus on several possible rigorous definitions in a recently described surfactant-free microemulsion that consists of octanol, ethanol, and water, in which micelle-like aggregates are in dynamic equilibrium with the surrounding pseudo phase. We test different definitions that are based on the radial distribution functions of the components with respect to the center of these surfactant-free micelles. All definitions result in experimentally indistinguishable locations of the interface within the limits of resolution of light, X-ray, and neutron scattering experiments, since their locations differ by at most 0.4 nm, which corresponds to roughly 2-3 bond lengths. (C) 2014 Elsevier B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: STRONGLY CURVED MONOLAYERS; FORCE-FIELD; WATER; MICROEMULSIONS; AMPHIPHILES; SCATTERING; DYNAMICS; SYSTEMS; Molecular dynamics; Simulations; Clusters; Microemulsion; Ternary solution; Ouzo effect
Subjects: 500 Science > 540 Chemistry & allied sciences
Divisions: Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie
Depositing User: Dr. Gernot Deinzer
Date Deposited: 07 Jun 2019 11:41
Last Modified: 07 Jun 2019 11:41
URI: https://pred.uni-regensburg.de/id/eprint/4838

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