Search Results - "Vroege, G J"

Liquid crystal phase transitions in suspensions of mineral colloids: new life from old roots by Lekkerkerker, H. N. W., Vroege, G. J.

“…A review is given of the field of mineral colloidal liquid crystals: liquid crystal phases formed by individual mineral particles within colloidal suspensions…”
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Experimental realization of biaxial liquid crystal phases in colloidal dispersions of boardlike particles by van den Pol, E, Petukhov, A V, Thies-Weesie, D M E, Byelov, D V, Vroege, G J

“…Biaxial nematic and biaxial smectic phases were found in a colloidal model system of goethite (alpha-FeOOH) particles with a simple boardlike shape and…”
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Direct observation of dipolar chains in iron ferrofluids by cryogenic electron microscopy by Philipse, A.P, Butter, K, Bomans, P.H.H, Frederik, P.M, Vroege, G.J

“…A key issue in research on ferrofluids (dispersions of magnetic colloids) is the effect of dipolar interactions on their structure and phase behaviour, which…”
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Coexistence of rhcp and fcc phases in hard-sphere colloidal crystals by Dolbnya, I. P, Petukhov, A. V, Aarts, D. G. A. L, Vroege, G. J, Lekkerkerker, H. N. W

“…We present results for high-resolution small-angle single-crystal X-ray diffraction of hard-sphere silica colloidal crystals. Our results indicate that the…”
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Observation of a hexatic columnar liquid crystal of polydisperse colloidal disks by PETUKHOV, A. V, VAN DER BEEK, D, DULLENS, R. P. A, DOLBNYA, I. P, VROEGE, G. J, LEKKERKERKER, H. N. W

“…We report the observation of a new type of columnar liquid crystal phase, which is formed by thin hard colloidal disks in a dense suspension. High-resolution…”
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Preparation and properties of colloidal iron dispersions by Butter, K., Kassapidou, K., Vroege, G.J., Philipse, A.P.

“…We systematically study the properties of dispersions of iron-based colloids synthesized in a broad size range by thermal decomposition of ironcarbonyl using…”
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Convenient preparation methods for magnetic colloids by van Ewijk, G.A., Vroege, G.J., Philipse, A.P.

“…We present convenient laboratory-scale preparation methods for maghemite grafted with fatty acids as well as maghemite–silica core–shell colloids…”
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Uniaxial and biaxial liquid crystal phases in colloidal dispersions of board-like particles by van den Pol, E., Thies-Weesie, D.M.E., Petukhov, A.V., Byelov, D.V., Vroege, G.J.

“…Dispersions of board-like goethite (α-FeOOH) particles with short-range repulsive interaction form a versatile colloidal model system, showing a nematic,…”
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Evidence of the hexagonal columnar liquid-crystal phase of hard colloidal platelets by high-resolution SAXS by VAN DER BEEK, D, PETUKHOV, A. V, OVERSTEEGEN, S. M, VROEGE, G. J, LEKKERKERKER, H. N. W

“…We report Small-Angle X-ray Scattering (SAXS) measurements of the columnar phase of hard colloidal gibbsite platelets. We have been able to create large…”
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Synthesis and properties of iron ferrofluids by Butter, K, Philipse, A.P, Vroege, G.J

“…We study the preparation and properties of metallic iron particles, synthesized by thermal decomposition of Fe(CO) 5 in the presence of a stabilizer. By…”
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Bragg rods and multiple X-ray scattering in random-stacking colloidal crystals by Petukhov, A V, Dolbnya, I P, Aarts, D G A L, Vroege, G J, Lekkerkerker, H N W

“…Synchrotron small-angle x-ray diffraction images of random-stacking-induced Bragg scattering rods are obtained in a wide range of wave vectors from a single…”
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Isotropic−Nematic Density Inversion in a Binary Mixture of Thin and Thick Hard Platelets by Wensink, H. H, Vroege, G. J, Lekkerkerker, H. N. W

“…We study the phase behavior of a binary mixture of thin and thick hard platelets, using Onsager's second virial theory for binary mixtures in the Gaussian…”
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High-resolution small-angle x-ray diffraction study of long-range order in hard-sphere colloidal crystals by Petukhov, A V, Aarts, D G A L, Dolbnya, I P, De Hoog, E H A, Kassapidou, K, Vroege, G J, Bras, W, Lekkerkerker, H N W

“…The long-range order parameters in single crystals of hard colloidal spheres grown in sediments of colloid-polymer mixtures are determined using synchrotron…”
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Magnetic-field-induced orientational order in the isotropic phase of hard colloidal platelets by van der Beek, D, Petukhov, A V, Davidson, P, Ferré, J, Jamet, J P, Wensink, H H, Vroege, G J, Bras, W, Lekkerkerker, H N W

“…The magnetic-field-induced orientational order in the isotropic phase of colloidal gibbsite [Al(OH)3] platelets is studied by means of optical birefringence…”
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Influence of a magnetic field on the nematic phase of hard colloidal platelets by van der Beek, D, Davidson, P, Wensink, H H, Vroege, G J, Lekkerkerker, H N W

“…We report on a study of the influence of a magnetic field on the nematic phase and the isotropic-to-nematic (IN) phase transition of hard colloidal gibbsite…”
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Onsager Revisited: Magnetic Field Induced Nematic−Nematic Phase Separation in Dispersions of Goethite Nanorods by van den Pol, E, Lupascu, A, Diaconeasa, M. A, Petukhov, A. V, Byelov, D. V, Vroege, G. J

“…We found, using polarization microscopy and small-angle X-ray scattering, that for goethite, a low polydispersity suffices to form two separate nematic phases,…”
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Magnetic-field-induced nematic-nematic phase separation and droplet formation in colloidal goethite by van den Pol, E, Verhoeff, A A, Lupascu, A, Diaconeasa, M A, Davidson, P, Dozov, I, Kuipers, B W M, Thies-Weesie, D M E, Vroege, G J

“…We demonstrate the suitability of polarization microscopy to study the recently discovered (parallel) nematic-(perpendicular) nematic phase separation. This…”
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Phase Behavior of Magnetic Colloid−Polymer Mixtures:  2. A Magnetic Sensing Coil Study by van Ewijk, G. A, Vroege, G. J, Kuipers, B. W. M

“…The effects of dipolar interaction and isotropic attraction on the phase behavior of ferrofluids are separately investigated by studying a ferrofluid,…”
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Theory of the isotropic-nematic-nematic phase separation for a solution of bidisperse rodlike particles by Vroege, G. J, Lekkerkerker, H. N. W

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3D structure of nematic and columnar phases of hard colloidal platelets by Leferink Op Reinink, A B G M, Meijer, J M, Kleshchanok, D, Byelov, D V, Vroege, G J, Petukhov, A V, Lekkerkerker, H N W

“…We present small angle x-ray scattering data of single-domain nematic and columnar liquid crystal phases in suspensions of sterically stabilized gibbsite…”
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