Micelle Structure in Aqueous Solutions of Polyoxyethylene Surfactants

Zulauf, M.; Weckström, Kristian; Hayter, John B.; Degiorgio, Vittorio; Corti, Mario

doi:10.1007/978-1-4613-1831-6_9

Cited by 11 publications

(12 citation statements)

References 12 publications

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“…This result is slightly higher than the one reported in the literature. Indeed, the value obtained by SANS or QELS measurements for this surfactant is around 3.0 nm [30,31]. The difference can be attributed to the polydispersity of the hydrophilic chains of the surfactant that we have used in our study.…”

Section: The R H 12 (Eo) 8 /R F 8 (Eo) 9 /Water Ternary Systemmentioning

confidence: 73%

Mixed fluorinated–hydrogenated surfactant-based system: Preparation of ordered mesoporous materials

Blin

Henzel

Stébé

2006

Journal of Colloid and Interface Science

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Section: The R H 12 (Eo) 8 /R F 8 (Eo) 9 /Water Ternary Systemmentioning

confidence: 73%

Mixed fluorinated–hydrogenated surfactant-based system: Preparation of ordered mesoporous materials

Blin

Henzel

Stébé

2006

Journal of Colloid and Interface Science

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“…craters in the gold deposit. The micrograph presented in Figure 10 shows gold grains that are as small as [8][9][10] A in diameter in spaces between gold grains 3-5 times larger. The detection of these very small gold grains suggests that the interstices between grains in heavier gold films may be covered with a deposit of gold 2 or 3 molecular layers thick which does not provide sufficient contrast on the supporting carbon film to be visible under the conditions used for electron microscopy in this work.…”

Section: Resultsmentioning

confidence: 99%

Energetic cluster impacts on thin gold and tantalum films

Matthew¹,

Beuhler²,

Ledbetter³

et al. 1986

J. Phys. Chem.

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“…[1][2][3][4][5][6][7][8] These systems are therefore the natural choice for the test of a new method which, with some luck, may give some clues to the unresolved structures. Recently, two of us presented time-resolved fluorescence quenching (TRFQ) measurements from the system C &~-H Z O .~ Since then we have learned to handle diffusioninfluenced quenching in two-dimensional systems in an appropriate way,I0 and we present a more comprehensive study of these systems as a test of the new method.…”

Section: Introductionmentioning

confidence: 99%

Phase structure of poly(oxyethylene) surfactants in water studied by fluorescence quenching

Medhage¹,

Almgren²,

Alsins³

1993

J. Phys. Chem.

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Binary systems of water and nonionic surfactants of the dodecyl poly(oxyethy1ene) type, C I~H~~-( O C H~-CH&OH (ClzE,), have been studied by time-resolved fluorescence quenching (TRFQ). The interest has been focused on the diffusion-influenced quenching in liquid crystalline phases of the C12E4, C12E5, C12E6, and Cl2Es systems and the ability of the TRFQ method to discriminate between different quenching geometries. The relative diffusion coefficients of pyrene and 3,4-dimethylbenzophenone have been measured in rod-shaped and lamellar aggregates in aqueous solutions as well as in neat surfactants. A new method, based on fluorescence quenching, for determination of layer thicknesses in lamellar systems is introduced and the results obtained are shown to be in close agreement with those from low-angle X-ray diffraction. In addition, we propose a method for determination of cylinder radii in rodlike micelles; even this method seems to produce values very similar to X-ray data. One attractive feature of the TRFQ method is that it does not require any liquid-crystalline order in the sample; it works equally well for aggregates in isotropic L1 phases, in which the occurrence of spherical, cylindrical, and disk-shaped micelles is demonstrated. For both rodlike and lamellar aggregates a slight increase in thickness with temperature is detected, which can be related to a decrease in effective surfactant head-group area, caused by a change in polarity of the ethylene oxide groups. The results of fluorescence quenching measurements in cubic phases show that the bicontinuous VI phase is essentially two-dimensional on the time scale of fluorescence, whereas for the I1 phase further evidence is given for the idea that the building stones in the I1 phase are small, slightly elongated, micelles with an axial ratio of approximately 1.51 for the C12Eg-water system. The quenching in the spongelike L3 phase proves to be more efficient than in the La phase, and the possible reasons for this are also discussed.

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Micelle Structure in Aqueous Solutions of Polyoxyethylene Surfactants

Cited by 11 publications

References 12 publications

Mixed fluorinated–hydrogenated surfactant-based system: Preparation of ordered mesoporous materials

Mixed fluorinated–hydrogenated surfactant-based system: Preparation of ordered mesoporous materials

Energetic cluster impacts on thin gold and tantalum films

Phase structure of poly(oxyethylene) surfactants in water studied by fluorescence quenching

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