Morphological Transformations in Solid Domains of Alkanes on Surfactant Solutions.
Alkanes on surfactant solutions can form three distinct phases at the air-solution interface, a liquid phase (L), a solid monolayer phase (S1), and a hybrid bilayer phase (S2). Phase coexistence between any two, or all three, of these phases has been observed by Brewster angle microscopy of tetradecane, hexadecane, and their mixtures on solutions of tetradecyltrimethylammonium bromide. The morphologies of the domains depend on the competition between line tension and electrostatic interactions, which are essentially different depending on the pair of phases in contact. Domains of S1 in the L phase are long and thin; however, long, thin domains of L in an S1 phase are not stable but break up into a string of small circular domains. The bilayer S2 domains are always circular, owing to the dominance of line tension on the morphology.
Department of Chemistry, Faculty of Sciences, Kyushu University, 812-8581 Fukuoka, Japan.|Department of Advanced Interdisciplinary Sciences, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan.|Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
Hiroki
H
Matsubara
Department of Chemistry, Faculty of Sciences, Kyushu University, 812-8581 Fukuoka, Japan.|Department of Advanced Interdisciplinary Sciences, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan.|Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
Tetsumasa
T
Takaichi
Department of Chemistry, Faculty of Sciences, Kyushu University, 812-8581 Fukuoka, Japan.|Department of Advanced Interdisciplinary Sciences, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan.|Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
Takanori
T
Takiue
Department of Chemistry, Faculty of Sciences, Kyushu University, 812-8581 Fukuoka, Japan.|Department of Advanced Interdisciplinary Sciences, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan.|Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
Makoto
M
Aratono
Department of Chemistry, Faculty of Sciences, Kyushu University, 812-8581 Fukuoka, Japan.|Department of Advanced Interdisciplinary Sciences, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan.|Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
Aya
A
Toyoda
Department of Chemistry, Faculty of Sciences, Kyushu University, 812-8581 Fukuoka, Japan.|Department of Advanced Interdisciplinary Sciences, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan.|Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
Kenichi
K
Iimura
Department of Chemistry, Faculty of Sciences, Kyushu University, 812-8581 Fukuoka, Japan.|Department of Advanced Interdisciplinary Sciences, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan.|Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
Philip A
PA
Ash
Department of Chemistry, Faculty of Sciences, Kyushu University, 812-8581 Fukuoka, Japan.|Department of Advanced Interdisciplinary Sciences, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan.|Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
Colin D
CD
Bain
Brewster angle microscopy; ellipsometry; line tension; phase transition; wetting