Quasi-elastic light scattering study of intermicellar interactions in aqueous sodium dodecyl sulfate solutions

Corti, Mario; Degiorgio, Vittorio

doi:10.1021/j150606a021

Cited by 345 publications

(290 citation statements)

References 9 publications

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“…The parameters involved in describing these interactions are the protein charge Q, radius R h , the solution ionic strength I, and the Hamacker constant H A , related to the short-range attractive part of the potential. 21 When considering a protein at the isoelectric point, as, in the present case, one can disregard the screened D-H potential (since Q ) 0) and write …”

Section: Resultsmentioning

confidence: 99%

Fractional Stokes−Einstein Relationship in Biological Colloids: Role of Mixed Stick−Slip Boundary Conditions

Chirico¹,

Placidi²,

Cannistraro³

1999

J. Phys. Chem. B

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The bovine serum albumin mutual diffusion coefficient D has been measured by photon correlation spectroscopy as a function of protein concentration. The solution viscosity η sol has been obtained by following the diffusion of spherical probes added, at a small volume fraction, to the protein solution. It is found that D follows a fractional Stokes-Einstein relation D ∼ 1/η sol R with R = 0.5 up to a protein concentration C = 15 g/dL. The observed behavior has been traced back to interparticle interactions taking into account the possibility of mixed stick-slip boundary condition at the protein-water interface.

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Section: Resultsmentioning

confidence: 99%

Fractional Stokes−Einstein Relationship in Biological Colloids: Role of Mixed Stick−Slip Boundary Conditions

Chirico¹,

Placidi²,

Cannistraro³

1999

J. Phys. Chem. B

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“…This is a strong hint at the presence of more or less spherical clusters. This procedure of comparing DLS and SLS results has already identified micelles of defined sizes 34 and pre-micelles with strongly concentration dependent aggregation numbers for short chain surfactants. 35 …”

Section: Light Scattering Experimentsmentioning

confidence: 99%

Eco-solvents – cluster-formation, surfactantless microemulsions and facilitated hydrotropy

Klossek

Touraud

Kunz

2013

Phys. Chem. Chem. Phys.

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In this paper we consider clusters in the ternary systems water-benzyl alcohol and ethanol, ethyl lactate or g-valerolactone as found with the help of dynamic and static light scattering experiments. These ternary mixtures are powerful solvent media and consist only of low-toxic solvents of natural origin. In a recent work we have shown that surfactantless microemulsions are formed in the water-ethanol-noctanol system. By contrast, in the systems studied here the sizes of the aggregates are too small to be considered as micelles. It can be postulated that the presence of clusters or larger structures as in surfactantless microemulsions is strongly influenced by the most hydrophobic compound. The phenomenon of facilitated hydrotropy is also investigated in the above-mentioned systems. In this context, ethanol is considered as the primary hydrotrope and the more hydrophobic benzyl alcohol as the facilitating secondary hydrotrope. The hydrophobic dye Disperse Red 13 is used as a marker of facilitated hydrotropy.The results suggest that the degree of self-association of eco-solvent has a significant influence on the hydrotropic efficiency of benzyl alcohol.

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“…We are interested in charged systems at low concentrations of electrolyte, and the attractive interactions can be entirely neglected. For example, Corti and Degiorgio (25) showed in their experiments with ionic micelles, that for Ka < 2.6 the Van der Waals attractive contribution is less than few percents.…”

Section: Calculation Of the Short Range Hydrodynamic Term Xsmentioning

confidence: 99%

Diffusion of charged colloidal particles at low volume fraction: Theoretical model and light scattering experiments

Petsev

Denkov

1992

Journal of Colloid and Interface Science

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An appropriate mean force potential was utilized in Felderhof's Theory to derive simple analytical expressions for the concentration dependence of the collective and short time self diffusion coefficients, as well as for the sedimentation velocity of charged spherical particles. It is demonstrated theoretically that the osmotic viriat and the Oseen hydrodynamic terms play a dominant role. To check the theoretical model, the dependence of the collective diffusion coefficient on the volume fraction of latex particles was experimentally studied. Dynamic light scattering was used at several different concentrations of electrolyte. It turns out that our experimental results, as well as the results of other authors, are in very good agreement with the proposed theoretical model. The results show that the increase of the electrolyte concentration leads to increase of the particle charge, but almost does not change the particle surface potential. A minimum in the dependence of the diffusion coefficient of a single particle on the ionic strength was also obtained.

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Quasi-elastic light scattering study of intermicellar interactions in aqueous sodium dodecyl sulfate solutions

Cited by 345 publications

References 9 publications

Fractional Stokes−Einstein Relationship in Biological Colloids: Role of Mixed Stick−Slip Boundary Conditions

Fractional Stokes−Einstein Relationship in Biological Colloids: Role of Mixed Stick−Slip Boundary Conditions

Eco-solvents – cluster-formation, surfactantless microemulsions and facilitated hydrotropy

Diffusion of charged colloidal particles at low volume fraction: Theoretical model and light scattering experiments

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