Light scattering of colloidal dispersions in non-polar solvents at finite concentrations. Silic spheres as model particles for hard-sphere interactions

Vrij, A.; Jansen, Joachim; Dhont, Jan K. G.; Pathmamanoharan, C.; Kops‐Werkhoven, M. M.; Fijnaut, H. M.

doi:10.1039/dc9837600019

Cited by 132 publications

(53 citation statements)

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“…A direct experimental test of the prediction of Biben and Hansen is obviously not an easy task as hard-sphere atoms do not exist in reality. However, one can prepare (almost) monodisperse spherical colloidal particles whose short-ranged harshly repulsive interparticle forces closely approximate that of hard spheres [9,10]. As indicated above, Onsager [3] has shown that the thermodynamic properties of such suspensions are the same as those of the hypothetical hard-sphere atomic system.…”

Section: Introductionmentioning

confidence: 98%

Free-volume approximations for predicting the phase behaviour of asymmetric hard-sphere mixtures

Lekkerkerker¹,

Oversteegen

2002

J. Phys.: Condens. Matter

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Two different levels of the free-volume approximation for the calculation of the phase diagram of a asymmetric hard-sphere mixture are compared to direct simulations of the phase behaviour. The mean-field-level freevolume approach, where only the statistically pre-averaged free volume is accounted for, is already in satisfactory agreement with the simulation results. Taking correlations into account within the free-volume approach improves the agreement with the solid branch of the phase diagram but, remarkably, this version performs somewhat worse for the fluid branch.

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Section: Introductionmentioning

confidence: 98%

Free-volume approximations for predicting the phase behaviour of asymmetric hard-sphere mixtures

Lekkerkerker¹,

Oversteegen

2002

J. Phys.: Condens. Matter

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“…A direct experimental test of the predictions of Biben and Hansen [3] is obviously not an easy task as hard-sphere atoms do not exist in reality. However, nowadays one can prepare (almost) monodisperse spherical colloidal particles whose short-ranged harshly repulsive interparticle forces closely approximate that of hard spheres [5,6]. It can be shown that the thermodynamic properties of such suspensions are the same as those of the hypothetical hard-sphere atomic system [7].…”

mentioning

confidence: 99%

“…In monodisperse suspensions of this kind the behaviour of the particles can be modelled with a hard-sphere interaction [6]. At volume fractions £ small between 0.25 and 0.35 and <£ large between 0.05 and 0.20 both visual observations and small-angle light scattering experiments provide evidence that a phase separation occurs.…”

mentioning

confidence: 99%

Phase Separation in Bimodal Dispersions of Sterically Stabilized Silica Particles

1993

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PACS. 82.70D -Colloids. PACS. 64.75 -Solubility, segregation, and mixing.Abstract. -Binary mixtures of suspended, nearly hard-sphere, sterically stabilized colloidal silica particles of diameter ratio 6 were observed to phase-separate at comparable volume fractions of the two particle species. The occurrence of phase separation as a function of the particle concentrations was studied visually and by small-angle light scattering. The results support recent predictions by Biben and Hansen.

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“…The static structure factor can be extrapolated to zero wave vector in scattering methods [8][9][10]. In this limit, the structure factor is proportional to the compressibility.…”

Section: Introductionmentioning

confidence: 99%

Direct Measurement of Thermodynamic Properties of Colloidal Hard Spheres

Dullens

Kegel

Aarts

2008

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Mesures directes des propriétés thermodynamiques de sphères dures colloïdales -Récemment, nous avons montré comment mesurer les propriétés de suspensions de sphères dures colloïdales par microscopie [Dullens et al. (2006) PNAS 103, 529]. Ici, nous présentons les détails expérimentaux complets sur la manière de capturer des images en trois dimensions d'une suspension de sphères dures colloïdales, couvrant une large gamme de densités, en utilisant la microscopie à laser confocal. De plus, nous approfondissons l'analyse des données et mesurons le volume disponible pour insérer une sphère additionnelle et l'aire de surface de ce volume. Ces propriétés géométriques sont liées aux grandeurs thermodynamiques clés par la géométrie statistique. Ceci nous permet de mesurer, d'une façon directe et non-intrusive, la pression, le potentiel chimique et la densité d'énergie libre d'une suspension de sphères dures ; ces mesures sont en bon accord avec les prédictions théoriques. Abstract -Direct Measurement of Thermodynamic Properties of Colloidal Hard SpheresRecently, we have shown how to measure thermodynamic properties of colloidal hard sphere suspensions by microscopy

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Light scattering of colloidal dispersions in non-polar solvents at finite concentrations. Silic spheres as model particles for hard-sphere interactions

Cited by 132 publications

References 0 publications

Free-volume approximations for predicting the phase behaviour of asymmetric hard-sphere mixtures

Free-volume approximations for predicting the phase behaviour of asymmetric hard-sphere mixtures

Phase Separation in Bimodal Dispersions of Sterically Stabilized Silica Particles

Direct Measurement of Thermodynamic Properties of Colloidal Hard Spheres

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