Light scattering and sedimentation equilibrium of a concentrated multicomponent hard rod dispersion

Bolhuis, Peter G.; Lekkerkerker, H.N.W.

doi:10.1016/0378-4371(93)90203-g

Cited by 14 publications

(16 citation statements)

References 32 publications

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“…Using the scaled particle expression for the excess chemical potential for rods with a volume fraction approaching zero in a sea of spheres 35,37 one obtains…”

Section: ͑5͒mentioning

confidence: 99%

Phase behavior of colloidal rod-sphere mixtures

Vliegenthart

Lekkerkerker

1999

The Journal of Chemical Physics

104

145

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We investigate the depletion induced phase separation in mixed suspensions of colloidal spheres with diameter and colloidal rods with length L and diameter D. Using an extension of the free volume method developed by one of us ͓H.N.W. Lekkerkerker and A. Stroobants, Physica A 195, 387 ͑1993͔͒, we calculate the phase diagrams for Lр and various L/D ratios. For long thin rods, the volume fractions of rods needed to induce phase separation scale as D 2 /L. Good agreement with recent experimental results is obtained.

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“…Using the scaled particle expression for the excess chemical potential for rods with a volume fraction approaching zero in a sea of spheres 35,37 one obtains…”

Section: ͑5͒mentioning

confidence: 99%

Phase behavior of colloidal rod-sphere mixtures

Vliegenthart

Lekkerkerker

1999

The Journal of Chemical Physics

104

145

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“…2 obtains as before. The work of insertion Eq.8, together with Eq.7,3 and 4, is the same as the one derived previously for phase behavior studies of rod/sphere mixtures [18,24]. The work of insertion in the present study will be used in section 5 to evaluate the force resisting the insertion of a spherocylinder into a hard sphere fluid of given volume fraction.…”

Section: Introductionmentioning

confidence: 98%

“…But the aims have invariably been the calculation of phase behaviorsay, demixing via depletion interactions in rod/sphere mixtures [18] or chain condensation via effective attractions in solutions of flexible polymers [19]. Our aim, on the other hand, is to describe directly the forces that arise in these colloidal systems, acting directly to resist the entry of chains.…”

Section: Introductionmentioning

confidence: 99%

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Osmotic force resisting chain insertion in a colloidal suspension

et al. 2003

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We consider the problem of inserting a stiff chain into a colloidal suspension of particles that interact with it through excluded volume forces. The free energy of insertion is associated with the work of creating a cavity devoid of colloid and sufficiently large to accommodate the chain. The corresponding work per unit length is the force that resists the entry of the chain into the colloidal suspension. In the case of a hard sphere fluid, this work can be calculated straightforwardly within the scaled particle theory; for solutions of flexible polymers, on the other hand, we employ simple scaling arguments. The forces computed in these ways are shown, for nanometer chain and colloid diameters, to be of the order of tens of pN for solution volume fractions of a few tenths. These magnitudes are argued to be important for biophysical processes such as the ejection of DNA from viral capsids into the cell cytoplasm.

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“…In order to obtain a concrete result we use the scaled particle theory [66,[68][69][70] to calculate W' (see appendix for details). This leads to the following (approximate) result for the free-volume fraction: In these expressions 7 is the overall length-to-diameter ratio of the spherocylinders (eq.…”

mentioning

confidence: 99%

Phase behaviour of rod-like colloid+flexible polymer mixtures

1994

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Summary. -The effect of non-adsorbing, flexible polymer on the isotropic-nematic transition in dispersions of rod-like colloids is investigated. A widening of the biphasic gap is observed, in combination with a marked polymer partitioning between the coexisting phases. Under certain conditions, areas of isotropicisotropic-nematic or isotropic-nematic-nematic three-phase coexistence appear in the phase diagram of rod-polymer mixtures.

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Light scattering and sedimentation equilibrium of a concentrated multicomponent hard rod dispersion

Cited by 14 publications

References 32 publications

Phase behavior of colloidal rod-sphere mixtures

Phase behavior of colloidal rod-sphere mixtures

Osmotic force resisting chain insertion in a colloidal suspension

Phase behaviour of rod-like colloid+flexible polymer mixtures

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