X-ray reflectivity measurements for freezing transitions of alkane wetting film on surfactant solution surface

Hiroki Matsubara; Tetsumasa Takaichi; Takanori Takiue; Hajime Tanida; Tomoya Uruga; Yohko F. Yano; Makoto Aratono

doi:10.1246/bcsj.20120263

X-ray reflectivity measurements for freezing transitions of alkane wetting film on surfactant solution surface

Hiroki Matsubara, Tetsumasa Takaichi, Takanori Takiue, Hajime Tanida, Tomoya Uruga, Yohko F. Yano, Makoto Aratono

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

X-ray reflectivity measurements were applied to hexadecane wetting film on aqueous solutions of hexadecyltrimethylammonium bromide (CTAB) and tetradecyltrimethylammonium bromide (TTAB). In both cases, the monolayers in which oil molecules are penetrated from hexadecane droplets into surfactant-adsorbed films were found at room temperature. Upon cooling, they showed first-order freezing transitions, however, it was also confirmed that the structures of freezing films were qualitatively different: hexadecane molecules were frozen together with CTAB to form mixed solid monolayer in CTABhexadecane while the frozen hexadecane monolayer wetted mixed liquid monolayer in TTABhexadecane.

Original language	English
Pages (from-to)	492-496
Number of pages	5
Journal	Bulletin of the Chemical Society of Japan
Volume	86
Issue number	4
DOIs	https://doi.org/10.1246/bcsj.20120263
Publication status	Published - Apr 26 2013

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All Science Journal Classification (ASJC) codes

Chemistry(all)

Cite this

Matsubara, H., Takaichi, T., Takiue, T., Tanida, H., Uruga, T., Yano, Y. F., & Aratono, M. (2013). X-ray reflectivity measurements for freezing transitions of alkane wetting film on surfactant solution surface. Bulletin of the Chemical Society of Japan, 86(4), 492-496. https://doi.org/10.1246/bcsj.20120263

X-ray reflectivity measurements for freezing transitions of alkane wetting film on surfactant solution surface. / Matsubara, Hiroki; Takaichi, Tetsumasa; Takiue, Takanori; Tanida, Hajime; Uruga, Tomoya; Yano, Yohko F.; Aratono, Makoto.

In: Bulletin of the Chemical Society of Japan, Vol. 86, No. 4, 26.04.2013, p. 492-496.

Research output: Contribution to journal › Article

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AB - X-ray reflectivity measurements were applied to hexadecane wetting film on aqueous solutions of hexadecyltrimethylammonium bromide (CTAB) and tetradecyltrimethylammonium bromide (TTAB). In both cases, the monolayers in which oil molecules are penetrated from hexadecane droplets into surfactant-adsorbed films were found at room temperature. Upon cooling, they showed first-order freezing transitions, however, it was also confirmed that the structures of freezing films were qualitatively different: hexadecane molecules were frozen together with CTAB to form mixed solid monolayer in CTABhexadecane while the frozen hexadecane monolayer wetted mixed liquid monolayer in TTABhexadecane.

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10.1246/bcsj.20120263