Structure in shear flow (old results)

Shear Isotropic
Stroboscobic-SANS measurements to follow the orientation of rod-like (wormlike micelles of block co-polymers and surfactants) under oscillatory shear shear flow (LAOS).

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SHEAR ISOTROPIC-NEMATIC COEXISTENCE
Spinodal decomposition of mixtures of rod-like virus and dextran at the I-N coexistence quench to a low shear rate as measured small angel light scattering.

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Nucleation growth of atactoids of mixtures of rod-like virus and dextran at the I-N after a quench to a high shear rate as measured small angel light scattering.

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Start up flow after phase separation in mixtures of rod-like virus and dextran as measured by polarized confocal microscopy.

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Shear banding in rod dispersions at the I-N transition: fd-dextran mixtures form large shear bands (1 mm thick). Intensity of the band flips when rotating crossed polarizers.

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Shear Nematic
Recovery of order after shearing a nematic phase of fd viruses using fluorescence microscopy with few labeled rods.

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Recovery of order after shearing a nematic phase of fd viruses polarization microscopy.

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Shear soft crystals
Highly charged colloidal spheres crystalize into poly-domains.

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Or into a mono domain, depending on the shear rate.

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Shear critical structures
Colloid-polymer mixtures close the gas-liquid phase transition have a critical structure. The movie shows the response of the intensity in 2D of small angle light scattering under oscillatory shear.

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Phase behaviour of complex mixtures (old results)

Spinodal decomposition of mixtures of rod-like virus and dextran at the I-N coexistence after a quench to 0 shear close to the isotropic phase as measured by polarized confocal microscopy.

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Nucleation growth of atactoids of mixtures of rod-like virus and dextran at the I-N coexistence after a quench to 0 shear close to the nematic phase as measured by polarized confocal microscopy.

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Rod-like virus in water being pushed from the isotropic to the nematic phase by applying 1000 kBar of pressure.

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Rod-like virus in water being released from the nematic to the isotropic phase by releasing 1000 kBar of pressure.

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