Gert Jan VROEGE
Van ’t Hoff Laboratory for Physical and Colloid Chemistry,
Debye Institute for Nanomaterials Science,
Utrecht University,
Padualaan 8,
3584 CH Utrecht
e-mail: g.j.vroege@uu.nl
Gert Jan Vroege studied chemistry at the University of Leiden and obtained his doctorate
on the theory of lyotropic liquid crystal polymers in the group of Theo Odijk at Delft
University of Technology, The Netherlands, in 1989. He worked on thermotropic
polymer liquid crystals as a researcher at the Institute for Polymer Materials TNO, and
has been employed as an associate professor since 1992 at the Van ’t Hoff Laboratory for
Physical and Colloid Chemistry, Utrecht University, The Netherlands. In 2004, he
became a fellow of University College Utrecht. His current field of interest comprises
experiments and theory of colloids, in particular mineral liquid crystals.
Publications:
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van den Pol, E., A. Lupascu, M.A. Diaconeasa, A.V. Petukhov, D.V. Byelov and G.J. Vroege,
Onsager Revisited: Magnetic Field Induced Nematic-Nematic Phase Separation in Dispersions of
Goethite Nanorods, J. Phys. Chem. Lett. 2010. 1: 2174.
van den Pol, E., D.M.E. Thies-Weesie, A.V. Petukhov, D.V. Byelov and G.J. Vroege, Uniaxial and
biaxial liquid crystal phases in colloidal dispersions of board-like particles, Liquid Crystals 2010. 37:
641.
van den Pol, E., A.V. Petukhov, D.M.E.Thies-Weesie, G.J. Vroege, Simple rectangular columnar
phase of goethite nanorods and its martensitic transition to the centered rectangular columnar phase,
Langmuir 2010. 26: 1579.
van den Pol, E., A.V. Petukhov, D.M.E. Thies-Weesie, D.V. Byelov, G.J. Vroege, Experimental
realization of biaxial liquid crystal phases in colloidal dispersions of boardlike particles, Phys. Rev.
Lett. 2009. 103: 258301.
van den Pol, E., D.M.E. Thies-Weesie, A.V. Petukhov, G.J. Vroege and K. Kvashnina Influence of
polydispersity on the phase behavior of colloidal goethite J. Chem. Phys. 2008. 129: 164715.
van den Pol, E., D.M.E. Thies-Weesie, A.V. Petukhov, P. Panine and G.J. Vroege Chromium-modified
goethite in an external magnetic field. J. Phys.: Condens. Matter 2008. 20: 404219.
van der Beek, D., P. Davidson, H.H. Wensink, G.J. Vroege and H.N.W. Lekkerkerker The influence of
a magnetic field on the nematic phase of hard colloidal platelets. Phys. Rev. E. 2008. 77: 031708.
Thies-Weesie, D. M. E., J. P de Hoog, M. H. Hernandez Mendiola, A. V. Petukhov and G. J. Vroege
Synthesis of Goethite as a model colloid for mineral liquid crystals. Chem. Mater. 2007. 19: 55385546.
Vroege, G.J., D.M.E. Thies-Weesie, A.V. Petukhov, B.J. Lemaire and P. Davidson Smectic liquidcrystalline order in suspensions of highly polydisperse Goethite nanorods. Adv. Mater. 2006. 18:
2565-2568
van der Beek, D., A.V. Petukhov, P. Davidson, J. Ferré, J.P. Jamet, H.H. Wensink, G.J. Vroege, W.
Bras and H.N.W. Lekkerkerker Magnetic-field-induced orientational order in the isotropic phase of
hard colloidal platelets. Phys. Rev. E 2006. 73: 041402-1-10.
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Dolbnya, I.P., A.V. Petukhov, D.G.A.L. Aarts, G.J. Vroege and H.N.W. Lekkerkerker Coexistence of
rhcp and fcc phases in hard-sphere colloidal crystals. Europhysics Letters 2005. 72: 962-968
Wensink, H.H. and G.J. Vroege Nematic order of model goethite nanorods in a magnetic field. Phys.
Rev. E 2005. 72: 031708-1-9.
Petukhov, A.V., D. van der Beek, R.P.A. Dullens, I.P. Dolbnya, G.J. Vroege and H.N.W. Lekkerkerker
Observation of a hexatic columnar liquid crystal of polydisperse colloidal disks. Phys. Rev. Lett. 2005.
95: 077801-1-4.
Kruglov, T., W.G. Bouwman, J. Plomp, M.T. Rekveldt, G.J. Vroege, A.V. Petukhov and D.M.E.
Thies-Weesie Structure of hard-sphere colloid observed in real space by spin-echo small-angle
neutron scattering. Physica B-Condensed Matter 2005. 357: 452-455.
van der Beek, D., A.V. Petukhov, S.M. Oversteegen, G.J. Vroege and H.N.W. Lekkerkerker Evidence
of the hexagonal columnar liquid-crystal phase of hard colloidal platelets by high-resolution SAXS.
Eur. Phys. J. E 2005. 16: 253-258.
Erné, B.H., E. van den Pol, G.J. Vroege, T. Visser and H.H. Wensink Size fractionation in a phaseseparated colloidal fluid. Langmuir 2005. 21: 1802-1805.
Butter, K., K. Kassapidou, G.J. Vroege and A.P. Philipse Preparation and properties of colloidal iron
dispersions. J. of Colloid and Interface Science 2005. 287: 485-495.
Butter, K., Wiedenmann A., Hoell A., Petukhov A.V., and G.J. Vroege, Small angle neutron and X-ray
scattering of dispersions of oleic-acid-coated iron particles. J. Appl. Cryst. 2004. 37: 847-856.
Petukhov, A.V., Dolbnya, I.P., Aarts, D.G.A.L., and G.J. Vroege, Drying colloidal crystals:
Destruction of long-range order recorded with small-angle x-ray diffraction. Phys. Rev. E 2004. 69:
031405-1-10.
Wensink, H.H., and G.J. Vroege, Demixing in binary mixtures of anisometric colloids. J. Phys:
Condens. Matter 2004. 16: S2015-S2027.
Krouglov, T., Bouwman, W.G., Plomp, J., Rekveldt, M.T., Vroege, G.J., Petukhov, A.V. and D.M.E.
Thies-Weesie, Structural transitions of hard-sphere colloids studied by Spin-Echo Small-Angle
Neutron Scattering. J. Appl. Cryst. 2003. 36: 1417-1423.
Erné, B.H., K. Butter, B.W.M. Kuipers and G.J. Vroege, Rotational diffusion in iron ferrofluids.
Langmuir 2003. 19: 8218-8225.
Wensink, H.H., and G.J. Vroege, Isotropic-nematic phase behavior of length-polydisperse hard rods.
J. Chem. Phys. 2003. 119: 6868-6882.
Xian, X., A.V. Petukhov, M.M.E. Snel, I.P. Dolbnya, D.G.A.L. Aarts, G.J. Vroege and H.N.W.
Lekkerkerker, Depletion-induced colloidal crystals at a wall characterised by small-angle X-ray
diffraction. J. Appl. Crystallogr. 2003. 36: 597-601.
Petukhov, A.V., I.P. Dolbnya, D.G.A.L. Aarts, G.J. Vroege, and H.N.W. Lekkerkerker, Bragg rods
and multiple x-ray scattering in random-stacking colloidal crystals. Phys. Rev. Lett. 2003. 90: 028304.
Butter, K., P.H. Bomans, P.M. Frederik, G.J. Vroege, and A.P. Philipse, Direct observation of dipolar
chains in ferrofluids in zero-field using cryogenic electron microscopy. J. Phys.: Condens. Matter
2003. 15: S1451-S1470.
Butter, K., P.H. Bomans, P.M. Frederik, G.J. Vroege, and A.P. Philipse, Direct observation of dipolar
chains in iron ferrofluids by cryogenic electron microscopy. Nature Materials, 2003. 2: 88-91.
Butter, K., A.P. Philipse, and G.J. Vroege, Synthesis and properties of iron ferrofluids. Journal of
Magnetism and Magnetic Materials, 2002. 252: 1-3.
van Ewijk, G.A., G.J. Vroege, B.W.M. Kuipers, and A.P. Philipse, Thermodynamic (in)stability of
ferrofluid-polymer mixtures. Journal of Magnetism and Magnetic Materials, 2002. 252: 32-34.
Wensink, H.H., G.J. Vroege, and H.N.W. Lekkerkerker, Biaxial versus uniaxial nematic stability in
asymmetric rod-plate mixtures. Physical Review E, 2002. 66: 041704.
van Ewijk, G.A., G.J. Vroege, and A.P. Philipse, Susceptibility measurements on a fractionated
aggregate-free ferrofluid. Journal of Physics-Condensed Matter, 2002. 14: 4915-4925.
Petukhov, A.V., et al., High-resolution small-angle x-ray diffraction study of long-range order in
hard-sphere colloidal crystals. Physical Review Letters, 2002. 88: 208301.
van Ewijk, G.A., G.J. Vroege, and B.W.M. Kuipers, Phase behavior of magnetic colloid-polymer
mixtures: 2. A magnetic sensing coil study. Langmuir, 2002. 18(2): 382-390.
van Ewijk, G.A. and G.J. Vroege, Phase behavior of magnetic colloid-polymer mixtures: 1. Mean field
calculations. Langmuir, 2002. 18(2): 377-381.
33. Wensink, H.H., G.J. Vroege, and H.N.W. Lekkerkerker, Isotropic-nematic phase separation in
asymmetrical rod-plate mixtures. Journal of Chemical Physics, 2001. 115(15): 7319-7329.
34. Wensink, H.H., G.J. Vroege, and H.N.W. Lekkerkerker, Isotropic-nematic density inversion in a
binary mixture of thin and thick hard platelets. Journal of Physical Chemistry B, 2001. 105(43):
10610-10618.
35. Ramzi, M., G.J. Vroege, and H.N.W. Lekkerkerker, New insights in the properties of cellulose in
phosphoric acid: Viscometric study. Macromolecular Symposia, 2001. 166: 209-215.
36. Kroon-Batenburg, L.M.J., et al., New insights in the structure of cellulose: solid state, accessibility and
solvent interactions - a model for the cellulose/phosphoric acid system. Das Papier, 2001. T71, IPW
4/2001: 3-8.
37. van Ewijk, G.A., G.J. Vroege, and A.P. Philipse, Convenient preparation methods for magnetic
colloids. Journal of Magnetism and Magnetic Materials, 1999. 201: 31-33.
38. Vroege, G.J. and H.N.W. Lekkerkerker, Theory of phase separation for a solution of tridisperse rodlike particles. Colloids and Surfaces A-Physicochemical and Engineering Aspects, 1997. 130: 405413.
39. Lekkerkerker, H.N.W., et al., Liquid crystal phase transitions in dispersions of rodlike colloidal
particles, in Observation, prediction and simulation of phase transitions in complex fluids, M.Baus et
al., Editor. 1995, Kluwer Academic Publishers. 52-112.
40. Lekkerkerker, H.N.W. and G.J. Vroege, Phase transitions in colloidal dispersions, in Fundamental
Problems in Statistical Mechanics VIII, H. van Beijeren and M.H. Ernst, Editors. 1994, Elsevier
Science. 207-225.
41. Vroege, G.J. and H.N.W. Lekkerkerker, Theory of the Isotropic Nematic Nematic Phase-Separation
for a Solution of Bidisperse Rodlike Particles. Journal of Physical Chemistry, 1993. 97(14): 36013605.
42. Lekkerkerker, H.N.W. and G.J. Vroege, Lyotropic Colloidal and Macromolecular Liquid-Crystals.
Philosophical Transactions of the Royal Society of London Series a-Mathematical Physical and
Engineering Sciences, 1993. 344(1672): 419-440.
43. Damman, S.B. and G.J. Vroege, Liquid-Crystalline Main-Chain Polymers with a Poly(p-Phenylene
Terephthalate) Backbone .4. X-Ray-Diffraction of the Polyester with Dodecyloxy Side-Chains.
Polymer, 1993. 34(13): 2732-2739.
44. Buijs, J. and G.J. Vroege, Physical Aging in a Thermotropic Liquid-Crystalline Polymer. Polymer,
1993. 34(22): 4692-4696.
45. Vroege, G.J. and H.N.W. Lekkerkerker, Phase Transitions in Lyotropic Colloidal and Polymer Liquid
Crystals. Reports on Progress in Physics, 1992. 55(8): 1241-1309.
46. Langelaan, H.C. en G.J. Vroege, Kristallisatieverschijnselen in Vectra, TNO-rapport 269/'92, 1992, 65
pp.
47. Vroege, G.J., De oplosbaarheid van lucht in polyesterharsen bij vacuümharsinjectie, TNO-rapport
195/'91, 1991, 31 pp.
48. Vroege, G.J., Aspects of the Equilibrium Theory of Polymer Liquid Crystals, 1989 (PhD thesis,
Technical University Delft).
49. Vroege, G.J., The Isotropic-Nematic Phase Transition and Other Properties of a Solution of
Semiflexible Poly-Electrolytes. Journal of Chemical Physics, 1989. 90(8): 4560-4566.
50. Vroege, G.J. and T. Odijk, Induced Chain Rigidity, Splay Modulus, and Other Properties of Nematic
Polymer Liquid-Crystals. Macromolecules, 1988. 21(9): 2848-2858.
51. Vroege, G.J. and T. Odijk, Elastic moduli of a nematic liquid-crystalline solution of polyelectrolytes.
Journal of Chemical Physics, 1987. 87: 4223-4232.
52. van Zeyl, P.H.M., C.A.G.O. Varma, and G.J. Vroege, Resonance Raman scattering from triplet states
of acridine and anthracene. Chemical Physics Letters, 1984. 105(2): 127-133.