Aqueous mixtures of spherical and rodlike (flexible) macroparticles: structure and dynamics of latex spheres in saltfree solutions

Biegel, J.; Hundegger, C.; Nadig, B.; Weber, R.

doi:10.1007/s100510050882

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…Since rods with a high aspect ratio act as effective depletion agents even when L ≈ σ , the depletion forces can be induced even when the spheres are strongly repulsive. Experimental work has been reported for L σ [23], L σ [2], and L σ [24,19,25], indicating a very rich phase behavior. However, apart from preliminary experiments on mixtures of polybenzylglutamate rods and silica spheres in DMF [26] and the work of Yasarawan on silica spheres mixed with sepiolite rods [25], there are no further reports of phase diagrams obtained in experiments.…”

Section: Introductionmentioning

confidence: 99%

Depletion induced clustering in mixtures of colloidal spheres andfd-virus

Guu

Dhont

Vliegenthart

et al. 2012

J. Phys.: Condens. Matter

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We determined the phase boundary of an ideal rod-sphere mixture consisting of fd-virus, which is an established model system for mono-disperse colloidal rods, and density matched mono-disperse polystyrene beads employing diffuse wave spectroscopy. The low volume fraction of fd needed to induce a phase separation at relatively low ionic strength exemplifies the fact that slender rods are very effective depletion agents. Confocal microscopy showed that stable clusters are formed during phase separation. Relaxation after shear deformation of these clusters showed that the phase separation is gas-liquid-like and that the interfacial tension involved is very low as in colloid-polymer mixtures.

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Section: Introductionmentioning

confidence: 99%

Depletion induced clustering in mixtures of colloidal spheres andfd-virus

Guu

Dhont

Vliegenthart

et al. 2012

J. Phys.: Condens. Matter

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“…Diffusion of spherical macromolecules through similar isotropic networks of very long and thin biopolymers has been studied in detail. [2][3][4][5][6] However, only a few experimental studies have been devoted to diffusion of spherical colloids through nematically ordered networks, [7][8][9] despite the fact that orientationally-ordered structures are found in abundance in nature. 10 Even less is known about the diffusion of rod-like colloids in concentrated suspensions.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic interactions in rod suspensions with orientational ordering

et al. 2010

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The effect of hydrodynamic interactions on the diffusion of rods in the nematic phase is studied, both experimentally by time-resolved fluorescence video microscopy and theoretically by mesoscalehydrodynamics simulations. The aspect ratio of the rods and the relative importance of hydrodynamic interactions-compared to direct interactions-are varied independently. This is achieved in experiments by using charged rod-like viruses (fd-virus) with varying ionic strength, both for the wildtype virus and viruses coated with a brush of polymers. In computer simulations, hydrodynamic interactions are incorporated by a particle-based mesoscopic simulation technique. It is found that translational long-time diffusion coefficients for parallel motion along the nematic director, scaled with the diffusion coefficient at infinite dilution, are significantly affected by hydrodynamic interactions, but are insensitive to the aspect ratio. In contrast, the diffusion anisotropy-defined as the ratio of the diffusion coefficients parallel and perpendicular to the nematic director-shows only a weak dependence on hydrodynamic interactions, but strongly varies with the aspect ratio.

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Dynamics in Rod-Sphere Composite Liquids

Pecora

2002

Structure and Dynamics of Polymer and Colloidal Systems

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Aqueous mixtures of spherical and rodlike (flexible) macroparticles: structure and dynamics of latex spheres in saltfree solutions

Cited by 3 publications

References 1 publication

Depletion induced clustering in mixtures of colloidal spheres andfd-virus

Depletion induced clustering in mixtures of colloidal spheres andfd-virus

Hydrodynamic interactions in rod suspensions with orientational ordering

Dynamics in Rod-Sphere Composite Liquids

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