Phase Transition in an Adsorption Layer of a Soluble Surfactant at the Air–Water Interface

Motschmann, H.; Lunkenheimer, Klaus

doi:10.1006/jcis.2001.8185

Cited by 14 publications

(15 citation statements)

References 32 publications

(26 reference statements)

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“…SHG measurements at the air-water interface with a surfactant that has the same SHG-active group as the surfactant used in this work have been reported in the literature [23,24]. The second order polarizability of the chromophore is completely dominated by its β zzz component, with z being along the long chromophore axis.…”

Section: Second Harmonic Generation (Shg)mentioning

confidence: 83%

A study of kinetic molecular exchange processes in the medium frequency range by surface SHG on an oscillating bubble

Örtegren

Wantke

Motschmann

et al. 2004

Journal of Colloid and Interface Science

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The dilatational properties of fluid surfaces and interfaces have been comprehensively investigated in recent years. For example, an improved oscillating bubble device provided experimental results that allow for critical testing of established surface models, such as the Lucassen/van den Tempel (LvdT) model. The comparison of the LvdT model with the oscillating bubble experiments demonstrates a mismatch between the model parameters. For example, near the CMC or the limit of solubility the calculated parameters of surfactant solutions become unrealistically large. The deviation can be explained by the introduction of more detailed surface models, in particular by the modification of the effective thickness of the surface layer, its internal structure and the molecular exchange processes between these structures. For the verification of such processes an experimental setup was realized which allows for an independent determination of the instantaneous adsorption state at the surface of an oscillating bubble inside a surfactant solution. The setup utilizes the Second Harmonic Generation (SHG)-effect at the air-solution interface generated by the light of a pulsed LASER. The set-up is described in detail, and the results of a first experimental series are presented and discussed in this paper. As system, aqueous solutions of the fluortenside F381 were used.  2004 Elsevier Inc. All rights reserved.

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Section: Second Harmonic Generation (Shg)mentioning

confidence: 83%

A study of kinetic molecular exchange processes in the medium frequency range by surface SHG on an oscillating bubble

Örtegren

Wantke

Motschmann

et al. 2004

Journal of Colloid and Interface Science

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show abstract

“…Transitions from gaseous to liquid-like states in soluble surfactant layers have also been predicted by molecular dynamic simulation by Tomassone et al [7]. Motschmann et al investigated the equilibrium surface tension isotherm of 2-[4-(4-trifluoromethylphenylazo)phenoxy]ethane sulfonate [8]. The isotherm could be described by the Frumkin equation of state using an interaction parameter above the threshold where this model predicts a phase transition.…”

Section: Introductionmentioning

confidence: 94%

Adsorption and surface rheology of n-dodecanol at the water/air interface

Ferrari

Ravera

Liggieri

et al. 2004

Journal of Colloid and Interface Science

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“…Condensed phase domains are, therefore, unexpected and there is even controversy over the existence of a G-LE phase transition in such a soluble surfactant. Motschmann and Lunkenheimer [36] found G-LE phase transition in an unusual water-soluble surfactant. Recent molecular dynamic simulations of small chain soluble surfactant demonstrated that the solubility does not preclude the G-LE phase transitions [37,38].…”

Section: Introductionmentioning

confidence: 98%

Phases and phase transitions in Gibbs monolayers of an alkyl phosphate surfactant

Hossain

Suzuki

Kato

2005

Journal of Colloid and Interface Science

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Phase Transition in an Adsorption Layer of a Soluble Surfactant at the Air–Water Interface

Cited by 14 publications

References 32 publications

A study of kinetic molecular exchange processes in the medium frequency range by surface SHG on an oscillating bubble

A study of kinetic molecular exchange processes in the medium frequency range by surface SHG on an oscillating bubble

Adsorption and surface rheology of n-dodecanol at the water/air interface

Phases and phase transitions in Gibbs monolayers of an alkyl phosphate surfactant

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