||H. Matsubara, M. Aratono, Unique Interfacial Phenomena on Macroscopic and Colloidal Scales Induced by Two-Dimensional Phase Transitions, Langmuir, 35, 1989-2001, 2019.02.
||Tokiwa Yuhei, Hiromu Sakamoto, Takanori Takiue, Makoto Aratono, Colin Bain, Hiroki Matsubara, Effect of Surface Freezing on Stability of Oil-in-Water Emulsions, Langmuir, 34, 2018.05.
||Hiroki Matsubara, Jo Otsuka, and Bruce M. Law, Finite-Size and Solvent Dependent Line Tension Effects for Nanoparticles at the Air–Liquid Surface, Langmuir, 34, 331-340, 2018.01.
||B.M. Law, S.P. McBride, J.Y. Wang, H.S. Wi, G. Paneru, S. Betelu, B. Flanders, F. Bresme, B. Ushijima, Y. Takata, Takanori Takiue, H. Matsubara, Makoto Aratono, Line tension and its influence on droplets and particles at surfaces, Langmuir, 92, 1-39, 2017.04.
||Yuhei Tokiwa, Kohki Ibi, Takayuki Toyomasu, Hiroyasu Sakamoto, Takanori Takiue, Norihiro Ikeda, Makoto Aratono, H. Matsubara, A competitive relationship between wetting of oil lens and condensed film formation of fluorinated alkanol at the air-water interface, Journal of Nanoscience and Nanotechnology, 13, 734-747, 2016.04.
||Y. Tokiwa, Hiroyasu Sakamoto, Takanori Takiue, Makoto Aratono, H. Matsubara, Effect of Alkane Chain Length and Counterion on the Freezing Transition of Cationic Surfactant Adsorbed Film at Alkane Mixture-Water Interfaces, J. Phys. Chem. B, 119, 6235-6241, 2015.04.
||Hiroki Matsubara, Baku Ushijima, B.M. Law, Takanori Takiue, Makoto Aratono, Line tension of alkane lenses on aqueous surfactant solutions at phase transitions of coexisting interfaces, Adv Colloid Interface Sci, 2014.04, Alkane droplets on aqueous solutions of surfactants exhibit a first-order wetting transition as the concentration of surfactant is increased. The low-concentration or “partial wetting” state corresponds to an oil lens in equilibrium with a two-dimensional dilute gas of oil and surfactant molecules. The high-concentration or “pseudo-partial wetting” state consists of an oil lens in equilibrium with a mixed monolayer of surfactant and oil. Depending on the combination of surfactant and oil, these mixed monolayers undergo a thermal phase transition upon cooling, either to a frozen mixed monolayer or to an unusual bilayer structure in which the upper leaflet is a solid layer of pure alkane with hexagonal packing and upright chains while the lower leaflet remains a disordered liquid-like mixed monolayer. Additionally, certain long-chain alkanes exhibit a surface freezing transition at the air-oil interface where the top monolayer of oil freezes above its melting point. In this review, we summarize our previous studies and discuss how these wetting and surface freezing transitions influence the line tension of oil lenses from both an experimental and theoretical perspective..
||Hiroki Matsubara, T. Takaichi, Takanori Takiue, H. Tanida, T. Uruga, Y.F. Yano, Makoto Aratono, X-ray Reflectivity Measurements for Freezing Transitions
of Alkane Wetting Film on Surfactant Solution Surface, Bull Chem Soc Jpn, 86, 492-496, 2013.04.
||Hiroki Matsubara, T. Takaichi, Takanori Takiue, Makoto Aratono, A. Toyoda, K. Iimura, P.A. Ash, C.D. Bain, Morphological Transformations in Solid Domains of Alkanes on
Surfactant Solutions, JPC lett, 4, 844−848, 2013.04, 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..
||大冨英輔, 常盤祐平, 池田宜弘, 谷田肇, 渡辺巌, Takanori Takiue, Makoto Aratono, Hiroki Matsubara, Thin-Thick Transition of Foam Film Driven by Phase Transition of Surfactant-Alkane Mixed Adsorbed Film, Chem. Lett., 41, 1300-1302, 2012.04.
||今井洋輔, 李慧慧, 宅見洋輝, 谷田肇, 渡辺巌, Takanori Takiue, Hiroki Matsubara, Makoto Aratono, Study on the distribution of binary mixed counterions in surfactant adsorbed films by total reflection XAFS measurements, Journal of Colloid and Interface Science, 388, 219-244, 2012.04.
||P.A. Ash, C.D. Bain, Hiroki Matsubara, Wetting in oil/water/surfactant systems, Current Opinion in Colloid & Interface Science, 17, 196, 2012.04, The behaviour of oils at aqueous interfaces is ubiquitous to many industrially and biologically relevant processes. In this review we consider modifications to the wetting properties of oils at the air/water, oil/water and solid/liquid interfaces in the presence of surfactants. First-order wetting transitions can be induced in a wide range of oils by varying the aqueous surfactant concentration, leading to the formation of mixed monolayers at the interface. In certain cases, these mixed monolayers display novel surface freezing behaviour, including the formation of unusual bilayer structures, which further modifies the properties of the interface.
The effects of surfactant on line tension at the three-phase contact line and differences between the air/liquid and liquid/liquid interfaces are discussed..
||Y. Ushijima B. Ushijima E Ohtomi Y Takata T Takiue M Aratono H Matsubara
, Line tension at freezing transition of alkane wetting film on aqueous surfactant solutions , Colloids and Surfaces A, 390, 33, 2011.04.
||H Matsubara A Onohara Y. Imai K Shimamoto T Takiue M Aratono
, Effect of temperature and counterion on adsorption of imidazolium ionic liquids at air-water interface, Colloids and Surfaces A, 370, 113, 2010.04.
||H Matsubara Y Ushijima Y Ikebe Y Takata T Takiue M Aratono
, First-Order Wetting Transition and Line Tension of Hexadecane Lens at Air/Water Interface Assisted by Surfactant Adsorption, BCSJ, 83, 1198, 2010.04.
||E Ohtomi T Takiue M Aratono H Matsubara
, Freezing transition of wetting film of tetradecane on tetradecyltrimethylammonium bromide solutions, Colloid and Polymer Science, 288, 1333, 2010.04.
||Y Imai K Shimamoto T Takiue H Matsubara M Aratono
, Study on surface adsorption from cationic surfactant-electrolyte mixed aqueous solution including BF4 - ion , Colloid and Polymer Science, 288, 1005, 2010.04.
||H Matsubara, T Eguchi, H Takumi, K Tsuchiya, T Takiue, M Aratono
, Surface Adsorption and Aggregate Formation of Cationic Gemini Surfactant and Long Chain Alcohol Mixtures, JPC B, 113, 8847-8853, 2009.04.
||H Matsubara, T Takamatsu, H Takumi, T Takiue, M Aratono
, SURFACE ADSORPTION AND MICELLE FORMATION OF AQUEOUS SOLUTIONS OF POLYETHYLENEGLYCOL AND SUGAR SURFACTANTS, Collid Polymer Science, 287, 1077-1082
||H Matsubara, E Ohtomi, CD Bain, M Aratono
, Wetting and Freezing of Hexadecane on an Aqueous Surfactant Solution: Triple Point in a 2-D film, JPC B, 2008.04.
||Y Takata, H Matsubara, T Matsuda, Y Kikuchi, T Takiue, BM Law, M Aratono
, Study on line tension of air/hexadecane/aqueous surfactant system, Colloid Polymer Science, 286 647-654
||H Matsubara, H Obata, T Matsuda, T Takiue, M Aratono
, Surface adsorption and aggregate formation of aqueous binary mixture of cationic surfactant and sugar surfactant, Colloids Surfaces A, 315, 183, 2008.04.
||H. Matsubsara, T. Nakano, T. Matsuda, T.Takiue, M.Aratono
, Effect of preferential adsorption on the synergism of a homologous cationic surfactant mixture , Langmuir, 22, 2511, 2006.04.
||H. Matsubara, M. Aratono, KM. Wilkinson, CD. Bain
, Lattice model for the wetting transition of alkanes on aqueous surfactant solutions, Langmuir, 22, 982, 2006.04.
||H Matsubara, T Shigeta, Y Takata, N Ikeda, T Takiue, M Aratono, Effect of Molecular Structure of Oil on Wetting Transition on Surfactant Solutions , Colloid and Surfaces A, 301, 141, 2007.04.
||H. Matsubara, T. Nakano, T. Matsuda, T. Takiue, M. Aratono, Effect of preferential adsorption on synergism of homologous cationic surfactant mixture, Langmuir, 22, 2511, 2006.04.
||H. Matsubara, M. Aratono, K. M. Wilkinson, C. D. Bain, Lattice Model for the Wetting Transition of Alkanes on Aqueous Surfactant Solutions, Langmuir, 22, 982, 2006.04.
||KM Wilkinson CD Bain H Matsubara M Aratono, Wetting of Surfactant Solutions by Alkanes, Chem Phys Chem, 10.1002/cphc.200400514, 6, 3, 547-555, vol 6, 381, 2005.04.
||Y Takata H Matsubara Y Kikuchi N Ikeda T Matsuda T Takiue M Aratono, Line Tension and Wetting Behavior of an Air/Hexadecane/Aqueous Surfactant System, Langmuir, 10.1021/la040098l, 21, 19, 8594-8596, vol 21, 8594, 2005.04.
||H Matsubara T Nakano T Matsuda T Takiue M Aratono, Effects of Alkyl Chain Length on Synergetic Adsorption and Micelle Formation in Homologous Cationic Surfactant Mixtures, Langmuir, 10.1021/la0508543, 21, 18, 8131-8137, vol 21, 8131, 2005.04.
||H Ohshima H Sato H Matsubara A Hyono M Okubo, A theory of adsorption kinetics with time delay and its application to overshoot and oscillation in the surface tension of gelatin solution, Colloid and Polymer Science, vol 282, 1174, 2004.04.
||K Shibata R Fujimoto H Matsubara T Takiue M Aratono, Novel phase behavior in adsorbed film of fluoroalkanol and cationic surfactant mixture , Colloid and Surfaces A, 10.1016/j.colsurfa.2004.04.080, 250, 1-3, 443-448, vol 250, 10, 2004.04.
||K Kashimoto H Matsubara H Takahara T Nakano T Takiue M Aratono, Effect of molecular packing on adsorption and micelle formation of a homologous cationic surfactant mixture of hexadecyltrimethylammonium bromide and, Colloid and Polyner Science, 10.1007/s00396-004-1147-7, 283, 3, 329-334, vol 283, 3, 2004.04.
||Matsubara, H., Ikeda, N., Takiue, T., Aratono, M. and Bain, C.D., Interfacial Films and Wetting Behavior of Hexadecane on Aqueous Solutions of Dodecyltrimethylammonium Bromide., Langmuir, 10.1021/la020861g, 19, 6, 2249-2253, vol 19, 2249, 2003.02.
||Matsubara, H., Kameda, M., Ohta, A., Ikeda, N. and Aratono, M., Interaction between Ionic and Nonionic Surfactants in the Adsorbed Film and Micelle. 3. Sodium dodecyl Sulfate and Tetraethylene Glycol Monooctyl Ether., Langmuir, 10.1021/la0104020, 17, 25, 7752-7757, vol 17, 7752, 2001.09.
||Matsubara,H., Ohta, A., Kameda, M., Ikeda, N. and Aratono, M., Interaction between Ionic and Nonionic Surfactants in the Adsorbed Film and Micelle. Dodecylammonium Chloride and Tetraethylene Glycol Monooctyl Ether., Langmuir, 10.1021/la991499h, 16, 20, 7589-7596, vol 16, 7589, 2000.05.