Binodal and spinodal curves of an L3 (sponge) phase

Literature Information

Publication Date 2001-09-07
DOI 10.1039/B103879F
Impact Factor 3.676
Authors

T. D. Le, U. Olsson, H. Wennerström, P. Uhrmeister, B. Rathke, R. Strey


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Abstract

In a previous paper (T. D. Le, U. Olsson, H. Wennerström and P. Schurtenberger, Phys. Re. E, 1999, 60, 4300) we presented a quantitative thermodynamic analysis of an L3 (sponge) phase formed in the C12E5–n-decane–water system where the focus was on the narrow stability range of the phase. In this study, we continue to develop and test the free energy model used in that analysis by extending the light scattering measurements towards the two-phase region. This is done by using the Joule heating temperature jump (JHTJ) technique to instantaneously jump (microsecond pulse) from an equilibrium state to a metastable state at a higher temperature. With multiple photosensors placed around the sample, we simultaneously measured the relaxation of the scattered light intensity at different scattering vectors, q. Our best-stretch of this set-up yielded a data set containing the q-dependent scattered intensity and turbidity measurements for a broad range of temperatures and concentrations. The combined phase equilibrium and T-jump data set shows agreement between experimental and theoretical binodal and spinodal curves of this L3 phase.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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