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Non-equilibrium formation of the cubic Pn3m phase in a monoolein/water system
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry. Avdelningen för fysikalisk kemi.
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2006 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 75, no 2, 267-273 p.Article in journal (Refereed) Published
Abstract [en]

Time-resolved small-angle X-ray diffraction experiments have been carried out to investigate the transformation from the cubic gyroid Ia3d to the cubic diamond Pn3m phase. The transition was induced by rapid addition of water to a monoolein/water system changing the initial water concentration of 26% w/w to excess of water conditions. The transformation proceeds in two steps: at the beginning, the two cubic mesophases have a strongly differing lipid/water composition and are accompanied by an intermediate phase. This phase vanishes as the ratio of cell parameters exceeds 1.50. Thereafter, the transition continues by a direct nearly isoareal transformation of the cubic minimal surfaces. Lateral area per lipid molecule, molecular shape and principle curvatures are about the same in this regime.

Place, publisher, year, edition, pages
2006. Vol. 75, no 2, 267-273 p.
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Atom and Molecular Physics and Optics
URN: urn:nbn:se:uu:diva-82059DOI: 10.1209/epl/i2006-10104-yISI: 000238803400013OAI: oai:DiVA.org:uu-82059DiVA: diva2:109974
Available from: 2006-09-15 Created: 2006-09-15 Last updated: 2016-08-25Bibliographically approved

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Almgren, Mats
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