The Effect of Fluctuations on Bilayer and Monolayer Systems: High-Resolution X-ray Scattering Study of a Three-Component Lamellar Phase

We have investigated the effect of symmetry on the fluctuation of a three-component lamellar phase composed of oil (octane), water, and a nonionic surfactant (C12E5). The studied lamellae consist of various oil/water volume ratios for a fixed surfactant concentration. From aligned lamellae, we succe...

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Bibliographic Details
Published in:Journal of colloid and interface science 1997-06, Vol.190 (2), p.456-460
Main Authors: Oda, Reiko, Mochrie, Simon G.
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
high-resolution X-ray scattering
lamellae
logarithmic correction
Membranes
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Summary:We have investigated the effect of symmetry on the fluctuation of a three-component lamellar phase composed of oil (octane), water, and a nonionic surfactant (C12E5). The studied lamellae consist of various oil/water volume ratios for a fixed surfactant concentration. From aligned lamellae, we succeeded in obtaining highly reproducible, high-resolution X-ray spectra with very small full width at half maximum (6 × 10−4Å−1). The deviation of the periodicity expected by the dilution law can be explained from the fluctuations. Measuring this deviation, we observed that for the constant surfactant concentration, lamellae with equal oil/water ratios have higher fluctuation than when oil/water → 0 or ∞ because of the difference of the flexibility of monolayers and bilayers
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.1997.4877