X-ray studies of surfactant ordering and interfacial phases at the water-oil interface

Sai Venkatesh Pingali; Takanori Takiue; Guangming Luo; Aleksey M. Tikhonov; Norihiro Ikeda; Makoto Aratono; Mark L. Schlossman

doi:10.1080/01932690600660582

X-ray studies of surfactant ordering and interfacial phases at the water-oil interface

Sai Venkatesh Pingali, Takanori Takiue, Guangming Luo, Aleksey M. Tikhonov, Norihiro Ikeda, Makoto Aratono, Mark L. Schlossman

Research output: Contribution to journal › Review article › peer-review

23 Scopus citations

Abstract

X-ray reflectivity studies of surfactants at the water-oil interface yield structural information with sub-nanometer resolution. In this presentation, we reviewed recent X-ray reflectivity measurements of the interface between water and a hexane solution of the hydrocarbon alkanol CH₃ (CH₂)₁₉OH and fluorocarbon alkanol CF₃(CF₂)₇ (CH₂)₂ OH. The mixed system exhibits three monolayer phases, two of which are similar to single surfactant phases. A transition from a liquid monolayer to a solid monolayer occurs with increasing temperature. This unusual phase transition and the qualitative features of the phase diagram are predicted by an appropriate superposition of the behavior of the two single surfactant systems.

Original language	English
Pages (from-to)	715-722
Number of pages	8
Journal	Journal of Dispersion Science and Technology
Volume	27
Issue number	5
DOIs	https://doi.org/10.1080/01932690600660582
State	Published - 2006
Externally published	Yes

Funding

We acknowledge conversations with Professor Dirk Morr (UIC Physics). This work was supported by the donors of The Petroleum Research Fund administered by the ACS, the UIC Campus Research Board, and the NSF Division of Materials Research. Brookhaven National Laboratory is supported by the U.S. Department of Energy.

Funders	Funder number
U.S. Department of Energy
American Cancer Society
Division of Materials Research
American Chemical Society Petroleum Research Fund
Campus Research Board

Keywords

Surfactants
Water-oil interface
X-ray reflectivity

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10.1080/01932690600660582

Cite this

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abstract = "X-ray reflectivity studies of surfactants at the water-oil interface yield structural information with sub-nanometer resolution. In this presentation, we reviewed recent X-ray reflectivity measurements of the interface between water and a hexane solution of the hydrocarbon alkanol CH3 (CH2)19OH and fluorocarbon alkanol CF3(CF2)7 (CH2)2 OH. The mixed system exhibits three monolayer phases, two of which are similar to single surfactant phases. A transition from a liquid monolayer to a solid monolayer occurs with increasing temperature. This unusual phase transition and the qualitative features of the phase diagram are predicted by an appropriate superposition of the behavior of the two single surfactant systems.",

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AU - Takiue, Takanori

AU - Luo, Guangming

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AU - Ikeda, Norihiro

AU - Aratono, Makoto

AU - Schlossman, Mark L.

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AB - X-ray reflectivity studies of surfactants at the water-oil interface yield structural information with sub-nanometer resolution. In this presentation, we reviewed recent X-ray reflectivity measurements of the interface between water and a hexane solution of the hydrocarbon alkanol CH3 (CH2)19OH and fluorocarbon alkanol CF3(CF2)7 (CH2)2 OH. The mixed system exhibits three monolayer phases, two of which are similar to single surfactant phases. A transition from a liquid monolayer to a solid monolayer occurs with increasing temperature. This unusual phase transition and the qualitative features of the phase diagram are predicted by an appropriate superposition of the behavior of the two single surfactant systems.

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X-ray studies of surfactant ordering and interfacial phases at the water-oil interface

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