prof. dr. W.K. (Willem) Kegel
W.K.Kegel@uu.nl
Gegenereerd op 2017-09-26 20:29:29


Chair
Self organizing systems
Profile

The central theme in my group is ‘self-organization’. We are interested in the mechanisms that govern the spontaneous formation of ordered structures from building blocks that vary in size from Angstroms to microns. These are length scales typically from the atomic to the colloidal domain. While the emphasis in my group is on experiments with colloids, theory plays an important role and we usually have one or more theoretical projects running.

Biology in particular offers many examples of complex, functional structures that form spontaneously out of (macro) molecular building blocks. For example virus capsids, the protein coats that encapsulate viral RNA or DNA, consist of tens to hundreds of copies of a capsomer protein (sometimes more than one type of protein). These proteins may spontaneously assemble into virus capsids, depending on physical conditions such as temperature, pH, and ionic strength. This process often is reversible: upon changing the physical conditions viruses may spontaneously disassemble again.

Experimental work in my group is mainly focused on colloids. Inspired by the rich complexity in biology, we develop and study new colloidal model systems in which both the geometry of the colloids and the orientation dependent interactions between them can be tuned. These particles are referred to as ‘patchy colloids’. The goal is to pin down the essential properties of these types of building blocks in the form of well-defined patchy colloids. If that can be accomplished, clearly something has been learned. An additional value of such an approach, at least in principle, is that with the insight gained, one may be able to design building blocks that form new and unique materials with interesting structural, optical, mechanical and /or electronic properties.

Recently, with colleagues at Caltech, we cooked up a self-consistent theory of gene expression for several regulatory scenarios see PRL 2014

And, check this one in Nature out on 'colloidal viruses'!

Involved in the following study programme(s)

Recently in Nature

Genetic regulation with colleagues at Caltech

On the PNAS cover
Gegenereerd op 2017-09-26 20:29:30
Curriculum vitae

April - July 2014  Sabbatical leave at Caltech Pasadena


2011 – 2013 Head department of chemistry at Utrecht University


2006 -  Full professor at the van't Hoff Laboratory, Utrecht University. Chair title: Self-organizing systems.


Sept 2005 - Feb 2006  Sabbatical leave at Dept. of Physics, New York   University


2004   NWO-VICI grant


1999 – 2006 Associate Professor (UHD) at the van't Hoff Laboratory, Utrecht University


1996 – 1999 Fellow with the Royal Netherlands Academy of Arts and Sciences (KNAW-Fellow)


1994 – 1996 Postdoctoral Research Associate with Prof. Howard Reiss at the University of California,  Los Angeles (UCLA)


1989 – 1993 PhD in Physical Chemistry, Utrecht University. Thesis: 'Interfacial properties and phase behaviour of an ionic microemulsion system'


1985 – 1989 MSc in Chemical Thermodynamics at Utrecht University.

Gegenereerd op 2017-09-26 20:29:30
All publications
  2017 - Scholarly publications
Moerman, Pepijn G., Moyses, Henrique W., van der Wee, Ernest, Grier, David G., Blaaderen, Alfons van, Kegel, Willem K., Groenewold, Jan & Brujic, Jasna (22.02.2017). Phoretic Interactions Between Active Droplets. arXiv.org 5 pages, 4 figures.
van Ravensteijn, Bas G P, Schild, Dirk Jan, Kegel, Willem K. & Klein Gebbink, Robertus J M (06.02.2017). The Immobilization of a Transfer Hydrogenation Catalyst on Colloidal Particles. ChemCatChem, 9 (3), (pp. 440-450) (11 p.).
van Ravensteijn, Bas G P & Kegel, Willem K (15.03.2017). Tuning particle geometry of chemically anisotropic dumbbell-shaped colloids. Journal of Colloid and Interface Science, 490, (pp. 462-477) (16 p.). Copyright © 2016 Elsevier Inc. All rights reserved..
  2016 - Scholarly publications
Moerman, Pepijn, Van Der Schoot, Paul & Kegel, Willem (07.07.2016). Kinetics versus thermodynamics in virus capsid polymorphism. Journal of Physical Chemistry B, 120 (26), (pp. 6003-6009) (7 p.).
Kamp, Marlous, Hermes, Michiel, Van Kats, Carlos M., Kraft, Daniela J., Kegel, Willem K., Dijkstra, Marjolein & Van Blaaderen, Alfons (09.02.2016). Selective Depletion Interactions in Mixtures of Rough and Smooth Silica Spheres. Langmuir, 32 (5), (pp. 1233-1240) (8 p.).
Evers, Chris H J, Luiken, Jurriaan A, Bolhuis, Peter G & Kegel, Willem K (08.06.2016). Self-assembly of microcapsules via colloidal bond hybridization and anisotropy. Nature, 534 (7607), (pp. 364-368).
Van Ravensteijn, Bas G P & Kegel, Willem K. (28.04.2016). Versatile procedure for site-specific grafting of polymer brushes on patchy particles via atom transfer radical polymerization (ATRP). Polymer Chemistry, 7 (16), (pp. 2858-2869) (12 p.).
  2015 - Scholarly publications
Baars, Roel J., van Leeuwen, Y. Mikal, Hendrix, Yuri, Velikov, Krassimir P., Kegel, Willem K. & Philipse, Albert P. (20.10.2015). Morphology-controlled functional colloids by heterocoagulation of zein and nanoparticles. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 483, (pp. 209-215) (7 p.).
Zhang, Tian Hui, Kuipers, Bonny W M, Tian, Wen De, Groenewold, Jan & Kegel, Willem K. (14.01.2015). Polydispersity and gelation in concentrated colloids with competing interactions. Soft Matter, 11 (2), (pp. 297-302) (6 p.).
Wolters, Joost Robert, Avvisati, Guido, Hagemans, Fabian, Vissers, Teun, Kraft, Daniela J, Dijkstra, Marjolein & Kegel, Willem (14.02.2015). Self-assembly of "Mickey Mouse" shaped colloids into tube-like structures: experiments and simulations. Soft Matter, 11 (6).
De Folter, Julius W J, Liu, Ping, Jiang, Lingxiang, Kuijk, Anke, Bakker, Henriëtte E., Imhof, Arnout, Van Blaaderen, Alfons, Huang, Jianbin, Kegel, Willem K., Philipse, Albert P. & Petukhov, Andrei V. (01.01.2015). Self-organization of anisotropic and binary colloids in thermo-switchable 1D microconfinement. Particle and Particle Systems Characterization, 32 (3), (pp. 313-320) (8 p.).
Pal, Antara, Meijer, Janne-Mieke, Wolters, Joost R., Kegel, Willem K. & Petukhov, A. V. (2015). Structure and stacking order in crystals of asymmetric dumbbell-like colloids. Journal of Applied Crystallography, 48, (pp. 238-243) (6 p.).
Pal, Antara, Malik, Vikash, He, Le, Erne, Ben H., Yin, Yadong, Kegel, Willem K. & Petukhov, A. V. (02.02.2015). Tuning the Colloidal Crystal Structure of Magnetic Particles by External Field. Angewandte Chemie-International Edition, 54 (6), (pp. 1803-1807) (5 p.).
  2014 - Scholarly publications
van Leeuwen, Y.M., Velikov, K. P. & Kegel, W.K. (2014). Colloidal stability and chemical reactivity of complex colloids containing Fe3+. Food Chemistry, 155, (pp. 161-166) (5 p.).
van Ravensteijn, Bas G. P. & Kegel, Willem K. (09.09.2014). Colloids with Continuously Tunable Surface Charge. Langmuir, 30 (35), (pp. 10590-10599) (10 p.).
Mani, Ethayaraja, Lechner, Wolfgang, Kegel, Willem K. & Bolhuis, Peter G. (07.07.2014). Equilibrium and non-equilibrium cluster phases in colloids with competing interactions. Soft Matter, 10 (25), (pp. 4479-4486) (8 p.).
de Folter, J.W.J., Hutter, E.M., Castillo, S.I.R., Klop, K.E., Philipse, A.P. & Kegel, W.K. (2014). Particle Shape Anisotropy in Pickering Emulsions: Cubes and Peanuts. Langmuir, 30 (4), (pp. 955-964) (10 p.).
Weinert, Franz M, Brewster, Robert C, Rydenfelt, Mattias, Phillips, Rob & Kegel, Willem K (19.12.2014). Scaling of gene expression with transcription-factor fugacity. Physical Review Letters, 113 (25), (pp. 258101).
  2013 - Scholarly publications
van Ravensteijn, B.G.P., Kamp, M, van Blaaderen, A. & Kegel, W.K. (2013). General Route toward Chemically Anisotropic Colloids. Chemistry of Materials, 25, (pp. 4348-4353) (6 p.).
Jiang, L., de Folter, J.W.J., Huang, J., Philipse, A.P., Kegel, W.K. & Petukhov, A.V. (2013). Helical Colloidal Sphere Structures through Thermo-Reversible Co-Assembly with Molecular Microtubes. Angewandte Chemie-International Edition, 52 (12), (pp. 3364-3368) (5 p.).
  2012 - Scholarly publications
Kraft, D.J., Kegel, W.K. & van der Schoot, P. P. A. M. (2012). A Kinetic Zipper Model and the Assembly of Tobacco Mosaic Virus. Biophysical Journal, 102 (12), (pp. 2845-2855) (11 p.).
el Masri, D., Vissers, T., Badaire, S, Stiefelhagen, J.C.P., Vutukuri, H.R., Helfferich, P.H., Zhang, T., Kegel, W.K., Imhof, A. & van Blaaderen, A. (2012). A qualitative confocal microscopy study on a range of colloidal processes by simulating microgravity conditions through slow rotations. Soft Matter, 8 (26), (pp. 6979-6990) (13 p.).
van Leeuwen, Y.M., Velikov, K. & Kegel, W.K. (2012). Morphology of colloidal metal pyrophosphate salts. RSC Advances, 2, (pp. 2534-2540) (7 p.).
Zhang, T., Klok, J., Tromp, R.H., Groenewold, J. & Kegel, W.K. (2012). Non-equilibrium cluster states in colloids with competing interactions. Soft Matter, 8 (3), (pp. 667-672) (6 p.).
van Leeuwen, Y.M., Velikov, K.P. & Kegel, W.K. (2012). Repeptization by dissolution in a colloidal system of iron(III) pyrophosphate. Langmuir, 28 (48), (pp. 16531-16535) (5 p.).
Mani, E., Sanz, E., Roy, S., Dijkstra, M., Groenewold, J. & Kegel, W.K. (2012). Sheet-like assemblies of spherical particles with point-symmetrical patches. Journal of Chemical Physics, 136, (pp. 144706/1-144706/5) (5 p.).
van Leeuwen, Y.M., Velikov, K.P. & Kegel, W.K. (2012). Stabilization through precipitation in a system of colloidal iron(III) pyrophosphate salts. Journal of Colloid and Interface Science, 381, (pp. 43-47) (5 p.).
Kraft, D.J., Ni, R., Smallenburg, F., Hermes, M., Yoon, K., Weitz, D.A., van Blaaderen, A., Groenewold, J., Dijkstra, M. & Kegel, W.K. (2012). Surface roughness directed self-assembly of patchy particles into colloidal micelles. Proceedings of the National Academy of Sciences of the United States of America, 109, (pp. 10787/1-10787/6) (6 p.).
  2011 - Scholarly publications
Kegel, W.K. & Lekkerkerker, H.N.W. (2011). Clay goes patchy. Nature Materials, 10 (1), (pp. 5-6) (2 p.).
Petukhov, A.V., Kegel, W.K. & van Duijneveldt, F.B. (2011). Colloidal Suspensions. Journal of physics. Condensed matter, 23, (pp. 190201/1-190201/3) (3 p.).
Groenewold, J., Zhang, T. & Kegel, W.K. (2011). Electrophoresis in charge-stabilized colloidal cluster phases. Journal of Physical Chemistry B, 115 (22), (pp. 7264-7267) (4 p.).
Mani, E., Groenewold, J. & Kegel, W.K. (2011). Modeling of equilibrium hollow objects stabilized by electrostatics. Journal of physics. Condensed matter, 23, (pp. 194105/1-194105/4) (4 p.).
Kraft, D.J., Hilhorst, J., Heinen, M.A.P., Hoogenraad, M.J., Luigjes, B. & Kegel, W.K. (2011). Patchy polymer colloids with tunable anisotropy dimensions. Journal of Physical Chemistry B, 115 (22), (pp. 7175-7181) (7 p.).
  2010 - Scholarly publications
Kraft, D.J., de Folter, J.W.J., Luigjes, B., Castillo, S.I.R., Sacanna, S., Philipse, A.P. & Kegel, W.K. (2010). Conditions for equilibrium solid-stabilized emulsions. Journal of Physical Chemistry B, 114 (32), (pp. 10347-10356) (10 p.). Cited By (since 1996): 1.
Kraft, D.J., Luigjes, B., de Folter, J.W.J., Philipse, A.P. & Kegel, W.K. (2010). Evolution of equilibrium pickering emulsions: a matter of time scales. Journal of Physical Chemistry B, 114 (38), (pp. 12257-12263) (7 p.).
Mani, E., Sanz, E., Bolhuis, P.G. & Kegel, W.K. (2010). Stabilization of nanoparticle shells by competing interactions. Journal of Physical Chemistry C, 114 (17), (pp. 7780-7786) (7 p.).
  2009 - Scholarly publications
Kraft, D.J., Groenewold, J. & Kegel, W.K. (2009). Colloidal molecules with well-controlled bond angles. Soft Matter, 2009 (5), (pp. 3823-3826) (4 p.).
de Villeneuve, V.W.A., Derendorp, L., Verboekend, D, Vermolen, E.C.M., Kegel, W.K., Lekkerkerker, H.N.W. & Dullens, R.P.A. (2009). Grain boundary pinning in doped hard sphere crystals. Soft Matter, 2009 (5), (pp. 2448-2452) (5 p.).
Zhang, T., Groenewold, J. & Kegel, W.K. (2009). Observation of a microcrystalline gel in colloids with competing interactions. Physical Chemistry Chemical Physics, 11, (pp. 10827-10830) (4 p.).
Kegel, W.K. & Groenewold, J. (2009). Scenario for equilibrium solid-stabilized emulsions. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 80, (pp. 030401/1-030401/4) (4 p.).
Kraft, D.J., Vlug, W.S., van Kats, C.M., van Blaaderen, A., Imhof, A. & Kegel, W.K. (2009). Self-assembly of colloids with liquid protrusions. Journal of the American Chemical Society, 131, (pp. 1182-1186) (5 p.).
Veen, S.J. & Kegel, W.K. (2009). Structural instability of shell-like assemblies of a keplerate-type polyoxometalate induced by ionic strength. Journal of Physical Chemistry B, 113 (46), (pp. 15137-15140) (4 p.).
van Schooneveld, M.M., de Villeneuve, V.W.A., Dullens, R.P.A., Aarts, D.G., Leunissen, M.E. & Kegel, W.K. (2009). Structure, stability, and formation pathways of colloidal gels in systems with short-range attraction and long-range repulsion. Journal of Physical Chemistry B, 113 (14), (pp. 4560-4564) (5 p.).
  2008 - Scholarly publications
Dullens, R.P.A., de Villeneuve, V.W.A., Mourad, M.C.D., Petukhov, A.V. & Kegel, W.K. (2008). Confocal microscopy of geometrically frustrated hard sphere crystals. EPJ Applied Physics, 44 (1), (pp. 21-28) (8 p.).
Dullens, R.P.A., Kegel, W.K. & Aarts, D.G.A.L. (2008). Direct measurement of thermodynamic properties of colloidal hard spheres. Revue de L'Institut Francais du Petrole, 63 (3), (pp. 295-303) (9 p.).
Roy, S., Bossers, Lydia C. A. M., Meeldijk, Hans J. D., Kuipers, Bonny W. M. & Kegel, Willem K. (05.02.2008). Directed synthesis of stable large polyoxomolybdate spheres. Langmuir, 24 (3), (pp. 666-669) (4 p.).
Veen, S.J., Roy, S., Filinchuk, Y., Chernyshov, D., Petukhov, A.V., Versluijs-Helder, M., Broersma, A., Soulimani, F., Visser, T. & Kegel, W.K. (2008). Extended structure design with simple molybdenum oxide building blocks and urea as a directing agent. Inorganic Chemistry, 47, (pp. 6863-6866) (6 p.).
  2007 - Scholarly publications
Verhoeff, A.A., Kistler, M.L., Bhatt, A., Pigga, J., Groenewold, J., Klokkenburg, M., Veen, S.J., Roy, S., Liu, T. & Kegel, W.K. (2007). Charge regulation as a stabilization mechanism for shell-like assemblies of polyoxometalates. Physical Review Letters, 99, (pp. 066104-1-066104-4) (4 p.).
Dullens, R.P.A., Aarts, D.G.A.L. & Kegel, W.K. (2007). Colloidal crystal–fluid interfaces. Philosophical Magazine Letters, 87 (11), (pp. 893-898) (6 p.).
Roy, S., Planken, K.L., Kim, R., van der Mandele, D. & Kegel, W.K. (2007). Direct evidence on the existence of [Mo132] Keplerate-type species in aqueous solution. Inorganic Chemistry, 46, (pp. 8469-8471) (3 p.).
Roy, S., Rijneveld-Ockers, M.T., Groenewold, J., Kuipers, B.W.M., Meeldijk, J.D. & Kegel, W.K. (2007). Spontaneous Formation of Micrometer-Size Inorganic Peapods. Langmuir, 23, (pp. 5292-5295) (4 p.).
Sacanna, S., Kegel, W.K. & Philipse, A.P. (2007). Spontaneous oil-in-water emulsification induced by charge-stabilized dispersions of various inorganic colloids. Langmuir, 23, (pp. 10486-10492) (7 p.).
Sacanna, S., Kegel, W.K. & Philipse, A.P. (2007). Thermodynamically Stable Pickering Emulsions. Physical Review Letters, 98, (pp. 158301-1-158301-4) (4 p.).
  2007 - Other output
Kegel, W.K. (01.03.2007). Wat wil de materie?. (22 p.). Utrecht: Universiteit Utrecht, Aanvaarding van het ambt van bijzonder hoogleraar op het vakgebied ”Zelfordenende systemen” aan de Universiteit Utrecht op 1 maart 2007 door Willem K. Kegel.
  2006 - Scholarly publications
Zandi, R., van der Schoot, P., Reguera, D., Kegel, W.K. & Reiss, H. (2006). Classical nucleation theory of virus capsids. Biophysical Journal, 90 (6), (pp. 1939-1948) (10 p.).
Simeonova, N., Dullens, R.P.A., Aarts, D.G.A.L., de Villeneuve, V.W.A., Lekkerkerker, H.N.W. & Kegel, W.K. (2006). Devitrification of colloidal glasses in real space. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 73 (4), (pp. 041401) (5 p.).
Dullens, R.P.A., Aarts, D.G.A.L. & Kegel, W.K. (2006). Direct measurement of the free energy by optical microscopy. Proceedings of the National Academy of Sciences of the United States of America, 103, (pp. 529-531) (3 p.).
Dullens, R.P.A., Aarts, D.G.A.L. & Kegel, W.K. (2006). Dynamic broadening of the crystal-fluid Interface of colloidal hard spheres. Physical Review Letters, 97, (pp. 228301) (4 p.).
Kegel, W.K., Breed, D.G.J., Elsesser, M. & Pine, D.J. (2006). Formation of anisotropic polymer colloids by disparate relaxation times. Langmuir, 22, (pp. 7135-7136) (2 p.).
Kegel, W.K. & van der Schoot, P. (2006). Physical regulation of the self-assembly of tobacco mosaic virus coat protein. Biophysical Journal, 91, (pp. 1501-1512) (12 p.).
Klokkenburg, M., Dullens, R.P.A., Kegel, W.K., Erne, B.H. & Philipse, A.P. (2006). Quantitative Real-Space analysis of self-assembled structures of magnetic dipolar colloids. Physical Review Letters, 96, (pp. 037203-1-037203-4) (4 p.).
Dullens, R.P.A., Mourad, M.C.D., Aarts, D.G.A.L., Hoogenboom, J. & Kegel, W.K. (2006). Shape-Induced frustration of hexagonal order in polyhedral colloids. Physical Review Letters, 96, (pp. 028304-1-028304-4) (4 p.).
Reincke, F.H., Kegel, W.K., Zhang, H., Nolte, M.A., Wang, D., Vanmaekelbergh, D.A.M. & Möhwald, H. (2006). Understanding the self-assembly of charged nanoparticles at the water/oil interface. Physical Chemistry Chemical Physics, 8, (pp. 3828-3835) (8 p.).
  2005 - Scholarly publications
de Villeneuve, V.W.A., Dullens, R.P.A., Aarts, D.G.A.L., Groeneveld, E., Scherff, J.H., Kegel, W.K. & Lekkerkerker, H.N.W. (2005). Colloidal hard-sphere crystal growth frustrated by large spherical impurities. Science, 309, (pp. 1231-1233) (3 p.).
de Villeneuve, V.W.A., Verboekend, D, Dullens, R.P.A., Aarts, D.G.A.L., Kegel, W.K. & Lekkerkerker, H.N.W. (2005). Hard sphere crystal nucleation and growth near large spherical impurities. Journal of physics. Condensed matter, 17, (pp. S3371-S3378) (8 p.).
Dullens, R.P.A., Aarts, D.G.A.L., Kegel, W.K. & Lekkerkerker, H.N.W. (2005). The Widom insertion method and ordering in small hard-sphere systems. Molecular Physics, 103 (21-23), (pp. 3195-3200) (6 p.).
Dullens, R.P.A. & Kegel, W.K. (2005). Topological lifetimes of polydisperse colloidal hard spheres at a wall. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 71 (011405), (pp. 1-9) (9 p.).
  2004 - Scholarly publications
Groenewold, J. & Kegel, W.K. (2004). Colloidal cluster phases, gelation and nuclear matter. Journal of physics. Condensed matter, 16, (pp. S4877-S4886) (10 p.).
Kegel, W.K. & van der Schoot, P. (2004). Competing hydrophobic and screened-Coulomb interactions in Hepatits B virus capsid assembly. Biophysical Journal, 86, (pp. 3905-3913) (9 p.).
Kegel, W.K. (2004). Equilibrium Clusters of Metal Oxides. Journal of Physical Chemistry A, 108, (pp. 1919-1922) (4 p.).
Simeonova, N. & Kegel, W.K. (2004). Gravity-induced aging in glasses of colloidal hard spheres. Physical Review Letters, 93 (3), (pp. 035701-1-035701-4) (4 p.).
Validzic, I.J. & Kegel, W.K. (2004). Influence of adsorbing species on properties of equilibrium silver iodide clusters. Journal of Colloid and Interface Science, 275, (pp. 197-203) (7 p.).
Dullens, R.P.A., Claesson, E.M. & Kegel, W.K. (2004). Preparation and properties of cross-linked fluorescent poly(mehtyl methacrylate) latex colloids. Langmuir, 20 (3), (pp. 658-664) (7 p.).
Dullens, R.P.A. & Kegel, W.K. (2004). Reentrant surface melting of colloidal hard spheres. Physical Review Letters, 92, (pp. 195702-1-195702-4) (5 p.).
Reincke, F.H., Hickey, S.G., Kegel, W.K. & Vanmaekelbergh, D.A.M. (2004). Spontaneous assembly of a monolayer of charged gold nanocrystals at the water/oil interface. Angewandte Chemie-International Edition, 43 (4), (pp. 458-462) (5 p.).
Validzic, I.J., van Hooijdonk, G., Oosterhout, S. & Kegel, W.K. (2004). Thermodynamic stability of clusters of molybdenum oxide. Langmuir, 20, (pp. 3435-3440) (6 p.).
  2003 - Scholarly publications
Dullens, R.P.A., Claesson, E.M., Derks, D., van Blaaderen, A. & Kegel, W.K. (2003). Monodisperse core-shell poly (methyl methacrylate) latex colloids. Langmuir, 19, (pp. 5963-5966) (4 p.).
Mladenovic, I.Lj., Kegel, W.K., Bomans, P.H. & Frederik, P.M. (2003). Observation of equilibrium, nanometer-sized clusters of silver iodide in aqueous solutions. Journal of Physical Chemistry B, 107, (pp. 5717-5722) (6 p.).
Simeonova, N. & Kegel, W.K. (2003). Real-space fluorescence recovery after photo-bleaching of concentrated suspensions of hard colloidal spheres. Faraday Discussions of the Chemical Society, 123, (pp. 27-35) (9 p.).
  2002 - Scholarly publications
Bosma, G., Pathmamanoharan, C., de Hoog, E.H.A., Kegel, W.K., van Blaaderen, A. & Lekkerkerker, H.N.W. (2002). Preparation of monodisperse, fluorescent PMMA-latex colloids by dispersion polymerization. Journal of Colloid and Interface Science, 245, (pp. 292-300) (9 p.).
  2001 - Scholarly publications
Groenewold, J. & Kegel, W.K. (2001). Anomalously large equilibrium clusters of colloids. Journal of Physical Chemistry B, 105, (pp. 11702-11709) (8 p.).
de Hoog, E.H.A., Kegel, W.K., van Blaaderen, A. & Lekkerkerker, H.N.W. (2001). Direct observation of crystallization and aggregation in a phase-separating colloid-polymer suspension 1407. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 6402 (2), (pp. 1407) (1 p.).
de Hoog, E.H.A., Kegel, W.K., van Blaaderen, A. & Lekkerkerker, H.N.W. (2001). Direct observation of crystallization and aggregation in a phase-separating colloid-polymer suspension. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 64, (pp. 021407-1) (7 p.).
Erikssson, J.C., Lunggren, S., Kegel, W.K. & Lekkerkerker, H.N.W. (2001). Entropy and droplet size dirstribuitons of Winsor I and II microemulsions. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 183-185, (pp. 347) (1 p.).
Kegel, W.K. (2001). Freezing of hard spheres in confinement. Journal of Chemical Physics, 115 (14), (pp. 6538) (1 p.).
Kegel, W.K. (2001). Two-step melting transition in confined hard spheres in three dimensions. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 63, (pp. 037104) (1 p.).
  2000 - Scholarly publications
Kegel, W.K. & Dhont, J.K.G. (2000). 'Ageing' of the structure of crystals of hard colloidal spheres. Journal of Chemical Physics, 112 (7), (pp. 3431-3436) (6 p.).
Kegel, W.K. (2000). Crystallization in glassy suspensions of colloidal hard spheres. Langmuir, 16, (pp. 939-941) (3 p.).
Kegel, W.K. & van Blaaderen, A. (2000). Direct Observation of Dynamical Heterogeneities in Colloidal Hard-Sphere Suspensions. Science, 287, (pp. 290-293) (4 p.).
  1999 - Scholarly publications
Kegel, W.K., Reiss, H. & Lekkerkerker, H.N.W. (1999). Freezing transition in very small systems of hard spheres. Physical Review Letters, 83 (25), (pp. 5298-5301) (4 p.).
Kegel, W.K., Overbeek, J.Th.G. & Lekkerkerker, H.N.W. (1999). Thermodynamics of microemulsions. In P. Kumar & K.L. Mittal (Eds.), Microemulsions, fundamental and applied aspects (pp. 13-44) (32 p.).
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Gegenereerd op 2017-09-26 20:29:30
Project:
Colloidal Chirality in Confinement
15.03.2014 to 15.03.2018
General project description 

There is a need for chiral structures on colloidal length scales, for example, to control the optical properties of materials. Although examples exist in nature of materials that self-assemble into chiral structures, the mechanisms for the transfer of chirality on a molecular length scale to the colloidal length scale are often unclear. The objective of this proposal is to study chiral self-assembly on a colloidal length scale in confinement. We will focus on the self-assembly of cellulose, known to show a chiral nematic phase, in the presence of temperature reversible supramolecular microtubules of sodium dodecyl sulphate (SDS) and β-cyclodextrin (β-CD). The microtubules are a versatile model for confining pores, while allowing in-situ measurement of the structure and dynamics of the co-assembly. Moreover, we can modify the microtubules using conventional wet-chemical methods...

Role Researcher Funding
Other grant (government funding): 62.5% is funded within Debye Graduate programme (NWO grant) and 37.5% - by European Synchrotron (ESRF)
Project members UU

Completed projects

Project:
Colloids with a valence: a new model system to study self-organization. 01.01.2011 to 01.01.2016
General project description

The objective of the proposed research is to develop colloidal particles with adjustable valence, and study their aggregation properties. Here, ‘valence’ is defined broadly as a measure for the potential number of bonds formed with other colloids, and corresponds to the number of sticky patches on the surface of a colloidal particle. We have recently developed a method to produce colloidal particles with adjustable number of patches and angles between them, see [Kraft et al., JACS 131, 1182, (2009); Soft Matter DOI: 10.1039/b910593j (2009)]. We propose to exploit and explore this unique system by making the patches sticky... 

 
Role Researcher Funding
NWO grant
Project members UU
Gegenereerd op 2017-09-26 20:29:30
Additional functions and activities

Geen

Gegenereerd op 2017-09-26 20:29:30
Full name
prof. dr. W.K. Kegel Contact details
Hugo R. Kruytgebouw

Padualaan 8
Room N711
3584 CH  UTRECHT
The Netherlands


Phone number (direct) +31 30 253 2873
Phone number (department) +31 30 253 2391
Postal address
Postbus 80.051
3508 TB    UTRECHT
The Netherlands
Gegenereerd op 2017-09-26 20:29:30
Last updated 24.04.2017