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Matsubara H, Ohtomi E, Aratono M, et al. Wetting and freezing of hexadecane on an aqueous surfactant solution: triple point in a 2-D film. J Phys Chem B. 2008;112(37):11664-8doi: 10.1021/jp802108v.
Matsubara, H., Ohtomi, E., Aratono, M., & Bain, C. D. (2008). Wetting and freezing of hexadecane on an aqueous surfactant solution: triple point in a 2-D film. The journal of physical chemistry. B, 112(37), 11664-8. https://doi.org/10.1021/jp802108v
Matsubara, H, et al. "Wetting and freezing of hexadecane on an aqueous surfactant solution: triple point in a 2-D film." The journal of physical chemistry. B vol. 112,37 (2008): 11664-8. doi: https://doi.org/10.1021/jp802108v
Matsubara H, Ohtomi E, Aratono M, Bain CD. Wetting and freezing of hexadecane on an aqueous surfactant solution: triple point in a 2-D film. J Phys Chem B. 2008 Sep 18;112(37):11664-8. doi: 10.1021/jp802108v. Epub 2008 Aug 26. PMID: 18729394.
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J Phys Chem B. 2008 Sep 18;112(37):11664-8. doi: 10.1021/jp802108v. Epub 2008 Aug 26.

Wetting and freezing of hexadecane on an aqueous surfactant solution: triple point in a 2-D film.

The journal of physical chemistry. B

H Matsubara, E Ohtomi, M Aratono, Colin D Bain

Affiliations

  1. Department of Chemistry, Faculty of Sciences, Kyushu University, Fukuoka, Japan. [email protected]

PMID: 18729394 DOI: 10.1021/jp802108v

Abstract

Wetting of water by hexadecane has been investigated by ellipsometry as a function of the concentration of the cationic surfactant dodecyltrimethylammonium bromide (DTAB) in the aqueous phase and temperature. Three phases are identified: a 2-D gas of hexadecane molecules and DTAB molecules, a 2-D liquid comprising a mixed monolayer of hexadecane and DTAB, and a 2-D 'solid' phase. Evidence is presented to support the hypothesis that the liquid-solid phase transition is actually a wetting transition in which a surface-frozen layer of pure hexadecane wets the liquid-like mixed monolayer of hexadecane and DTAB. The triple point, at which the three phases coexist, is located at a temperature of 17.3 degrees C and DTAB concentration of 0.75 mmol kg (-1). The slopes of the three phase boundaries are analyzed thermodynamically.

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