Microemulsions: a Landau-Ginzburg theory

Chen, Kan ; Jayaprakash, C. ; Pandit, Rahul ; Wenzel, Wolfgang (1990) Microemulsions: a Landau-Ginzburg theory Physical Review Letters, 65 (21). pp. 2736-2739. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v65/i21/p2736_1

Related URL: http://dx.doi.org/10.1103/PhysRevLett.65.2736


We present a Landau-Ginzburg theory for oil-water-surfactant mixtures with a scalar order parameter ψ for the oil-water subsystem and a vector τ for the surfactant part. A physical interpretation of the parameters in terms of single-membrane energetics is given. A detailed density-functional calculation yields three-phase coexistence between oil-rich, water-rich, and microemulsion phases, and modulated phases including lamellar, columnar, and cubic phases. The computed structure factor for water in the microemulsion phase shows a variety of trends in qualitative accord with experiments.

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Deposited On:30 Mar 2011 12:34
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