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Prof. dr. W.K. (Willem) Kegel

Professor 
Science
Chemistry
Debye Institute for Nanomaterials Science
Physical and Colloid Chemistry
Physical and Colloid Chemistry
Hugo R. Kruytgebouw
Padualaan 8
Kamer N711
3584 CH Utrecht

Prof. dr. W.K. (Willem) Kegel

Professor
Physical and Colloid Chemistry
+31 30 253 2873
w.k.kegel@uu.nl
Profile CV Publications Research Teaching Ancillary activities Contact
Profile CV Publications Research Teaching Ancillary activities Contact
Research areas

Publications

2024

Scholarly publications

van der Sijs, A., Visser, T., Moerman, P., Folkers, G., & Kegel, W. (2024). Broccoli aptamer allows quantitative transcription regulation studies in vitro. PLoS One, 19(6), Article e0304677. https://doi.org/10.1371/journal.pone.0304677
Moslehi, N., van Eekelen, M., Velikov, K. P., & Kegel, W. K. (2024). Ferrous Pyrophosphate and Mixed Divalent Pyrophosphates as Delivery Systems for Essential Minerals. ACS Food Science & Technology, 4(6), 1388–1401. https://doi.org/10.1021/acsfoodscitech.4c00050
Rogier, F., Shao, W., Guo, Y., Zhuang, L., Kegel, W. K., & Groenewold, J. (2024). Deformation of confined liquid interfaces by inhomogeneous electric fields and localized particle forces. Journal of Colloid and Interface Science, 657, 830-840. https://doi.org/10.1016/j.jcis.2023.11.099
https://dspace.library.uu.nl/bitstream/handle/1874/437823/1-s2.0-S0021979723022166-main.pdf?sequence=1

2023

Scholarly publications

Martin Robinson, J. L., & Kegel, W. K. (2023). Cooperative transitions involving hydrophobic polyelectrolytes. Proceedings of the National Academy of Sciences of the United States of America, 120(6), 1-10. Article e2211088120. https://doi.org/10.1073/pnas.2211088120
https://dspace.library.uu.nl/bitstream/handle/1874/434404/martin-robinson-kegel-2023-cooperative-transitions-involving-hydrophobic-polyelectrolytes.pdf?sequence=1
Dekker, R. I., Velandia, S. F., Kibbelaar, H. V. M., Morcy, A., Sadtler, V., Roques-Carmes, T., Groenewold, J., Kegel, W. K., Velikov, K. P., & Bonn, D. (2023). Is there a difference between surfactant-stabilised and Pickering emulsions? Soft Matter, 19(10), 1941-1951. https://doi.org/10.1039/d2sm01375d
https://dspace.library.uu.nl/bitstream/handle/1874/434403/d2sm01375d.pdf?sequence=1
Landman, J., Verduyn Lunel, S. M., & Kegel, W. K. (2023). Transcription factor competition facilitates self-sustained oscillations in single gene genetic circuits. PLoS Computational Biology, 19(9), Article e1011525. https://doi.org/10.1371/journal.pcbi.1011525
https://dspace.library.uu.nl/bitstream/handle/1874/434402/journal.pcbi.1011525.pdf?sequence=1
Bijlsma, J., Moslehi, N., Velikov, K. P., Kegel, W. K., Vincken, J. P., & de Bruijn, W. J. C. (2023). Reactivity of Fe(III)-containing pyrophosphate salts with phenolics: complexation, oxidation, and surface interaction. Food Chemistry, 407, 1-11. Article 135156. https://doi.org/10.1016/j.foodchem.2022.135156
https://dspace.library.uu.nl/bitstream/handle/1874/434031/1-s2.0-S0308814622031181-main.pdf?sequence=1

2022

Scholarly publications

Moslehi, N., Bijlsma, J., de Bruijn, W. J. C., Velikov, K. P., Vincken, J. P., & Kegel, W. K. (2022). Design and characterization of Ca-Fe(III) pyrophosphate salts with tunable pH-dependent solubility for dual-fortification of foods. Journal of Functional Foods, 92, Article 105066. https://doi.org/10.1016/j.jff.2022.105066
Kibbelaar, H. V. M., Dekker, R. I., Morcy, A., Kegel, W. K., Velikov, K. P., & Bonn, D. (2022). Ethyl cellulose nanoparticles as stabilizers for Pickering emulsions. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 641, Article 128512. https://doi.org/10.1016/j.colsurfa.2022.128512
Bijlsma, J., Kegel, W., Moslehi, N., & Velikov, K. P. (2022). Iron-fortified food product. (Patent No. WO 2022/048952 A1).

2021

Scholarly publications

Dekker, R. I., Deblais, A., Veltkamp, B., Veenstra, P., Kegel, W. K., & Bonn, D. (2021). Creep and drainage in the fast destabilization of emulsions. Physics of Fluids, 33(3), 1-9. Article 033302. https://doi.org/10.1063/5.0039097
Guo, Y., & Kegel, W. K. (2021). Fabrication of floating colloidal crystal monolayers by convective deposition. Journal of Colloid and Interface Science, 587, 1-13. https://doi.org/10.1016/j.jcis.2020.12.037
https://dspace.library.uu.nl/bitstream/handle/1874/413309/1_s2.0_S0021979720316933_main.pdf?sequence=1
Verweij, R. W., Moerman, P. G., Huijnen, L. P. P., Ligthart, N. E. G., Chakraborty, I., Groenewold, J., Kegel, W. K., van Blaaderen, A., & Kraft, D. J. (2021). Conformations and diffusion of flexibly linked colloidal chains. JPhys Materials, 4(3), 1-19. Article 035002. https://doi.org/10.1088/2515-7639/abf571
Chang, F., Ouhajji, S., Townsend, A., Sanogo Lacina, K., van Ravensteijn, B. G. P., & Kegel, W. K. (2021). Controllable synthesis of patchy particles with tunable geometry and orthogonal chemistry. Journal of Colloid and Interface Science, 582(Part A), 333-341. https://doi.org/10.1016/j.jcis.2020.08.038
Rehor, I., Maslen, C., Moerman, P. G., Van Ravensteijn, B. G. P., Van Alst, R., Groenewold, J., Eral, H. B., & Kegel, W. K. (2021). Photoresponsive hydrogel microcrawlers exploit friction hysteresis to crawl by reciprocal actuation. Soft Robotics, 8(1), 10-18. https://doi.org/10.1089/soro.2019.0169

2020

Scholarly publications

Guo, Y., van Ravensteijn, B. G. P., & Kegel, W. K. (2020). Self-assembly of isotropic colloids into colloidal strings, Bernal spiral-like, and tubular clusters. Chemical Communications, 56(46), 6309-6312. https://doi.org/10.1039/d0cc00948b
https://research-portal.uu.nl/ws/files/235428452/d0cc00948b.pdf
Van Ravensteijn, B. G. P., Voets, I. K., Kegel, W. K., & Eelkema, R. (2020). Out-of-Equilibrium Colloidal Assembly Driven by Chemical Reaction Networks. Langmuir, 36(36), 10639-10656. https://doi.org/10.1021/acs.langmuir.0c01763
Meredith, C. H., Moerman, P. G., Groenewold, J., Chiu, Y. J., Kegel, W. K., van Blaaderen, A., & Zarzar, L. D. (2020). Predator–prey interactions between droplets driven by non-reciprocal oil exchange. Nature Chemistry, 12(12), 1136-1142. https://doi.org/10.1038/s41557-020-00575-0
Dekker, R. I., Deblais, A., Velikov, K. P., Veenstra, P., Colin, A., Kellay, H., Kegel, W. K., & Bonn, D. (2020). Emulsion Destabilization by Squeeze Flow. Langmuir, 36(27), 7795-7800. https://doi.org/10.1021/acs.langmuir.0c00759
Verweij, R. W., Moerman, P. G., Ligthart, N. E. G., Huijnen, L. P. P., Groenewold, J., Kegel, W. K., Blaaderen, A. V., & Kraft, D. J. (2020). Flexibility-induced effects in the Brownian motion of colloidal trimers. Physical Review Research, 2(3), Article 033136. https://doi.org/10.1103/PhysRevResearch.2.033136

2019

Scholarly publications

Guo, Y., Van Ravensteijn, B. G. P., & Kegel, W. K. (2019). Dimple Colloids with Tunable Cavity Size and Surface Functionalities. Macromolecules, 52(11), 4287-4294. https://doi.org/10.1021/acs.macromol.9b00406
Chang, F., Van Ravensteijn, B. G. P., Lacina, K. S., & Kegel, W. K. (2019). Bifunctional Janus Spheres with Chemically Orthogonal Patches. ACS Macro Letters, 8(6), 714-718. https://doi.org/10.1021/acsmacrolett.9b00193
Anzivino, C., Chang, F., Soligno, G., Van Roij, R., Kegel, W. K., & Dijkstra, M. (2019). Equilibrium configurations and capillary interactions of Janus dumbbells and spherocylinders at fluid-fluid interfaces. Soft Matter, 15(12), 2638-2647. https://doi.org/10.1039/c8sm02361a
Mbareche, H., Veillette, M., Teertstra, W., Kegel, W., Bilodeau, G. J., Wösten, H. A. B., & Duchaine, C. (2019). Fungal Cells Recovery From Air Samples: A Tale of Loss And Gain. Applied and Environmental Microbiology, 85(9), 1-15. Article e02941-18. https://doi.org/10.1128/AEM.02941-18

2018

Scholarly publications

van der Holst, B., Kegel, W. K., Zandi, R., & van der Schoot, P. (2018). The different faces of mass action in virus assembly. Journal of Biological Physics, 44(2), 163-179. https://doi.org/10.1007/s10867-018-9487-6
Chen, Y. J., Wu, D., Gelbart, W., Knobler, C. M., Phillips, R., & Kegel, W. K. (2018). Two-Stage Dynamics of in Vivo Bacteriophage Genome Ejection. Physical Review X, 8(2), Article 021029. https://doi.org/10.1103/PhysRevX.8.021029
Landman, J., Ouhajji, S., Prévost, S., Narayanan, T., Groenewold, J., Philipse, A. P., Kegel, W. K., & Petukhov, A. V. (2018). Inward growth by nucleation: Multiscale self-assembly of ordered membranes. Science advances, 4(6), Article eaat1817. https://doi.org/10.1126/sciadv.aat1817

2017

Scholarly publications

Guo, Y., Van Ravensteijn, B. G. P., Evers, C. H. J., & Kegel, W. K. (2017). pH Reversible Encapsulation of Oppositely Charged Colloids Mediated by Polyelectrolytes. Langmuir, 33(18), 4551-4558. https://doi.org/10.1021/acs.langmuir.7b00845
Newton, A. C., Groenewold, J., Kegel, W. K., & Bolhuis, P. G. (2017). The role of multivalency in the association kinetics of patchy particle complexes. Journal of Chemical Physics, 146(23), Article 234901. https://doi.org/10.1063/1.4984966
https://dspace.library.uu.nl/bitstream/handle/1874/361719/1.4984966.pdf?sequence=1
Wolters, J. R., Verweij, J. E., Avvisati, G., Dijkstra, M., & Kegel, W. K. (2017). Depletion-Induced Encapsulation by Dumbbell-Shaped Patchy Colloids Stabilize Microspheres against Aggregation. Langmuir, 33(13), 3270-3280. https://doi.org/10.1021/acs.langmuir.7b00014
Rehor, I., van Vreeswijk, S., Vermonden, T., Hennink, W. E., Kegel, W. K., & Eral, H. B. (2017). Biodegradable Microparticles for Simultaneous Detection of Counterfeit and Deteriorated Edible Products. Small, 13(39), Article 1701804. https://doi.org/10.1002/smll.201701804
Van Ravensteijn, B. G. P., Hendriksen, W. E., Eelkema, R., Van Esch, J. H., & Kegel, W. K. (2017). Fuel-Mediated Transient Clustering of Colloidal Building Blocks. Journal of the American Chemical Society, 139(29), 9763-9766. https://doi.org/10.1021/jacs.7b03263
https://dspace.library.uu.nl/bitstream/handle/1874/355626/4.pdf?sequence=1
Van Ravensteijn, B. G. P., Vilanova, N., De Feijter, I., Kegel, W. K., & Voets, I. K. (2017). Temperature-Induced, Selective Assembly of Supramolecular Colloids in Water. ACS Omega, 2(4), 1720-1730. https://doi.org/10.1021/acsomega.7b00111
Moerman, P. G., Moyses, H. W., Van Der Wee, E. B., Grier, D. G., Van Blaaderen, A., Kegel, W. K., Groenewold, J., & Brujic, J. (2017). Solute-mediated interactions between active droplets. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 96(3), Article 032607. https://doi.org/10.1103/PhysRevE.96.032607
Landman, J., Brewster, R. C., Weinert, F. M., Phillips, R., & Kegel, W. K. (2017). Self-consistent theory of transcriptional control in complex regulatory architectures. PLoS One, 12(7), Article e0179235. https://doi.org/10.1371/journal.pone.0179235
van Ravensteijn, B. G. P., Schild, D. J., Kegel, W. K., & Klein Gebbink, R. J. M. (2017). The Immobilization of a Transfer Hydrogenation Catalyst on Colloidal Particles. ChemCatChem, 9(3), 440-450. https://doi.org/10.1002/cctc.201601096
van Ravensteijn, B. G. P., & Kegel, W. K. (2017). Tuning particle geometry of chemically anisotropic dumbbell-shaped colloids. Journal of Colloid and Interface Science, 490, 462-477. https://doi.org/10.1016/j.jcis.2016.11.045

2016

Scholarly publications

Moerman, P., Van Der Schoot, P., & Kegel, W. (2016). Kinetics versus thermodynamics in virus capsid polymorphism. Journal of Physical Chemistry B, 120(26), 6003-6009. https://doi.org/10.1021/acs.jpcb.6b01953
Van Ravensteijn, B. G. P., & Kegel, W. K. (2016). Versatile procedure for site-specific grafting of polymer brushes on patchy particles via atom transfer radical polymerization (ATRP). Polymer Chemistry, 7(16), 2858-2869. https://doi.org/10.1039/c6py00450d
Evers, C. H. J., Luiken, J. A., Bolhuis, P. G., & Kegel, W. K. (2016). Self-assembly of microcapsules via colloidal bond hybridization and anisotropy. Nature, 534(7607), 364-368. Article 534. https://doi.org/10.1038/nature17956
https://dspace.library.uu.nl/bitstream/handle/1874/334350/20160718_bondhybridization_arxiv.pdf?sequence=3
Kamp, M., Hermes, M., Van Kats, C. M., Kraft, D. J., Kegel, W. K., Dijkstra, M., & Van Blaaderen, A. (2016). Selective Depletion Interactions in Mixtures of Rough and Smooth Silica Spheres. Langmuir, 32(5), 1233-1240. https://doi.org/10.1021/acs.langmuir.5b04001

2015

Scholarly publications

Baars, R. J., van Leeuwen, Y. M., Hendrix, Y., Velikov, K. P., Kegel, W. K., & Philipse, A. P. (2015). Morphology-controlled functional colloids by heterocoagulation of zein and nanoparticles. Colloids and surfaces. A, physicochemical and engineering aspects, 483, 209-215. https://doi.org/10.1016/j.colsurfa.2015.04.042
https://dspace.library.uu.nl/bitstream/handle/1874/329976/colloids.pdf?sequence=1
Pal, A., Meijer, J.-M., Wolters, J. R., Kegel, W. K., & Petukhov, A. V. (2015). Structure and stacking order in crystals of asymmetric dumbbell-like colloids. Journal of Applied Crystallography, 48, 238-243. https://doi.org/10.1107/S1600576714028222
Pal, A., Malik, V., He, L., Erne, B. H., Yin, Y., Kegel, W. K., & Petukhov, A. V. (2015). Tuning the Colloidal Crystal Structure of Magnetic Particles by External Field. Angewandte Chemie-International Edition, 54(6), 1803-1807. https://doi.org/10.1002/anie.201409878
https://dspace.library.uu.nl/bitstream/handle/1874/329975/Pal.pdf?sequence=1
De Folter, J. W. J., Liu, P., Jiang, L., Kuijk, A., Bakker, H. E., Imhof, A., Van Blaaderen, A., Huang, J., Kegel, W. K., Philipse, A. P., & Petukhov, A. V. (2015). Self-organization of anisotropic and binary colloids in thermo-switchable 1D microconfinement. Particle & Particle Systems Characterization, 32(3), 313-320. https://doi.org/10.1002/ppsc.201400132
https://dspace.library.uu.nl/bitstream/handle/1874/314697/Folter_et_al_2015_Particle_Particle_Systems_Characterization.pdf?sequence=1
Zhang, T. H., Kuipers, B. W. M., Tian, W. D., Groenewold, J., & Kegel, W. K. (2015). Polydispersity and gelation in concentrated colloids with competing interactions. Soft Matter, 11(2), 297-302. https://doi.org/10.1039/c4sm02273d
Wolters, J. R., Avvisati, G., Hagemans, F., Vissers, T., Kraft, D. J., Dijkstra, M., & Kegel, W. (2015). Self-assembly of "Mickey Mouse" shaped colloids into tube-like structures: experiments and simulations. Soft Matter, 11(6). https://doi.org/10.1039/C4SM02375G

2014

Scholarly publications

Weinert, F. M., Brewster, R. C., Rydenfelt, M., Phillips, R., & Kegel, W. K. (2014). Scaling of gene expression with transcription-factor fugacity. Physical Review Letters, 113(25), 258101. https://doi.org/10.1103/PhysRevLett.113.258101
van Ravensteijn, B. G. P., & Kegel, W. K. (2014). Colloids with Continuously Tunable Surface Charge. Langmuir, 30(35), 10590-10599. https://doi.org/10.1021/la501993c
Mani, E., Lechner, W., Kegel, W. K., & Bolhuis, P. G. (2014). Equilibrium and non-equilibrium cluster phases in colloids with competing interactions. Soft Matter, 10(25), 4479-4486. https://doi.org/10.1039/c3sm53058b
van Leeuwen, Y. M., Velikov, K. P., & Kegel, W. K. (2014). Colloidal stability and chemical reactivity of complex colloids containing Fe3+. Food Chemistry, 155, 161-166. https://doi.org/10.1016/j.foodchem.2014.01.045
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), 955-964. https://doi.org/10.1021/la402427q

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, 4348-4353. https://doi.org/10.1021/cm4025606
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), 3364-3368. https://doi.org/10.1002/anie.201209767

2012

Scholarly publications

van Leeuwen, Y. M., Velikov, K., & Kegel, W. K. (2012). Morphology of colloidal metal pyrophosphate salts. RSC Advances, 2(6), 2534-2540. https://doi.org/10.1039/C2RA00449F
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), 2845-2855. https://doi.org/10.1016/j.bpj.2012.05.007
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), 6979-6990. https://doi.org/10.1039/c2sm07217c
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), 16531-16535. https://doi.org/10.1021/la303668a
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, 43-47. https://doi.org/10.1016/j.jcis.2012.05.018
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, 144706/1-144706/5. Article 144706. https://doi.org/10.1063/1.3702203
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), 667-672. https://doi.org/10.1039/C1SM06570J
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, 10787/1-10787/6. Article 10787. https://doi.org/10.1073/pnas.1116820109/-/DCSupplemental

2011

Scholarly publications

Kegel, W. K., & Lekkerkerker, H. N. W. (2011). Clay goes patchy. Nature Materials, 10(1), 5-6. https://doi.org/10.1038/nmat2927
Groenewold, J., Zhang, T., & Kegel, W. K. (2011). Electrophoresis in charge-stabilized colloidal cluster phases. Journal of Physical Chemistry. B, 115(22), 7264-7267. https://doi.org/10.1021/jp1097603
Petukhov, A. V., Kegel, W. K., & van Duijneveldt, F. B. (2011). Colloidal Suspensions. Journal of Physics: Condensed Matter, 23, 190201/1-190201/3. https://doi.org/10.1088/0953-8984/23/19/190201
Mani, E., Groenewold, J., & Kegel, W. K. (2011). Modeling of equilibrium hollow objects stabilized by electrostatics. Journal of Physics: Condensed Matter, 23, 194105/1-194105/4. https://doi.org/10.1088/0953-8984/23/19/194105
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), 7175-7181. https://doi.org/10.1021/jp108760g

2010

Scholarly publications

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), 7780-7786. https://doi.org/10.1021/jp1004067
https://dspace.library.uu.nl/bitstream/handle/1874/202450/Stabilization-of-nanoparticle-shells_2010_Journal-of-Physical-Chemistry-C.pdf?sequence=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), 12257-12263. https://doi.org/10.1021/jp104662g
https://dspace.library.uu.nl/bitstream/handle/1874/202430/Evolution-of-equilibrium-pickering-emulsions-a-matter-of-time-scales_2010_Journal-of-Physical-Chemistry-B.pdf?sequence=1
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), 10347-10356. https://doi.org/10.1021/jp102659b

2009

Scholarly publications

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), 4560-4564.
Kegel, W. K., & Groenewold, J. (2009). Scenario for equilibrium solid-stabilized emulsions. Physical Review. E, Statistical, nonlinear, and soft matter physics, 80, 030401/1-030401/4.
https://dspace.library.uu.nl/bitstream/handle/1874/43530/e030401.pdf?sequence=1
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), 15137-15140.
Kraft, D. J., Groenewold, J., & Kegel, W. K. (2009). Colloidal molecules with well-controlled bond angles. Soft Matter, 2009(5), 3823-3826.
Zhang, T., Groenewold, J., & Kegel, W. K. (2009). Observation of a microcrystalline gel in colloids with competing interactions. Physical Chemistry Chemical Physics, 11, 10827-10830.
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), 2448-2452.
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, 1182-1186. https://doi.org/10.1021/ja8079803

2008

Scholarly publications

Roy, S., Bossers, L. C. A. M., Meeldijk, H. J. D., Kuipers, B. W. M., & Kegel, W. K. (2008). Directed synthesis of stable large polyoxomolybdate spheres. Langmuir, 24(3), 666-669. https://doi.org/10.1021/la703467d
Dullens, R. P. A., Kegel, W. K., & Aarts, D. G. A. L. (2008). Direct measurement of thermodynamic properties of colloidal hard spheres. Oil & gas science and technology, 63(3), 295-303.
https://dspace.library.uu.nl/bitstream/handle/1874/33066/1592.pdf?sequence=1
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. European Physical Journal Applied Physics, 44(1), 21-28. https://doi.org/10.1051/epjap:2008145
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, 6863-6866.
https://dspace.library.uu.nl/bitstream/handle/1874/32577/1594.pdf?sequence=1

2007

Scholarly publications

Dullens, R. P. A., Aarts, D. G. A. L., & Kegel, W. K. (2007). Colloidal crystal–fluid interfaces. Philosophical Magazine Letters, 87(11), 893-898. http://www.informaworld.com/smpp/title~db=all~content=t713695410
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, 10486-10492.
https://dspace.library.uu.nl/bitstream/handle/1874/26722/1571.pdf?sequence=1
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, 8469-8471.
https://dspace.library.uu.nl/bitstream/handle/1874/26721/1570.pdf?sequence=1
Sacanna, S., Kegel, W. K., & Philipse, A. P. (2007). Thermodynamically Stable Pickering Emulsions. Physical Review Letters, 98, 1-4. Article 158301.
https://dspace.library.uu.nl/bitstream/handle/1874/26655/1559.pdf?sequence=1
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, 5292-5295.
https://dspace.library.uu.nl/bitstream/handle/1874/26657/1561.pdf?sequence=1
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, 1-4. Article 066104.
https://dspace.library.uu.nl/bitstream/handle/1874/26697/1565.pdf?sequence=1

Other output

Kegel, W. K. (2007). Wat wil de materie? Universiteit Utrecht.
https://dspace.library.uu.nl/bitstream/handle/1874/26652/1555.pdf?sequence=1

2006

Scholarly publications

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, 529-531.
https://dspace.library.uu.nl/bitstream/handle/1874/20001/1519.pdf?sequence=1
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, 1-4. Article 228301.
https://dspace.library.uu.nl/bitstream/handle/1874/20039/1546.pdf?sequence=1
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, 3828-3835.
https://dspace.library.uu.nl/bitstream/handle/1874/20045/1537.pdf?sequence=1
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, 1-4. Article 028304.
https://dspace.library.uu.nl/bitstream/handle/1874/20002/1520.pdf?sequence=1
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), 041401.
https://dspace.library.uu.nl/bitstream/handle/1874/20035/1528.pdf?sequence=1
Kegel, W. K., Breed, D. G. J., Elsesser, M., & Pine, D. J. (2006). Formation of anisotropic polymer colloids by disparate relaxation times. Langmuir, 22, 7135-7136.
https://dspace.library.uu.nl/bitstream/handle/1874/20043/1535.pdf?sequence=1
Zandi, R., van der Schoot, P., Reguera, D., Kegel, W. K., & Reiss, H. (2006). Classical nucleation theory of virus capsids. Biophysical Journal, 90(6), 1939-1948.
https://dspace.library.uu.nl/bitstream/handle/1874/20033/1526.pdf?sequence=1
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, 1-4. Article 037203.
https://dspace.library.uu.nl/bitstream/handle/1874/20003/1521.pdf?sequence=1
Kegel, W. K., & van der Schoot, P. (2006). Physical regulation of the self-assembly of tobacco mosaic virus coat protein. Biophysical Journal, 91, 1501-1512.
https://dspace.library.uu.nl/bitstream/handle/1874/20038/1533.pdf?sequence=1

Other output

Dullens, R. P. A., Mourad, M. C. D., Aarts, D., Hoogenboom, J., & Kegel, W. K. (2006). Shape-Induced frustration of hexagonal order in polyhedral colloids. Physical Review Letters, 96(028304).

2005

Scholarly publications

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), 1-9.
https://dspace.library.uu.nl/bitstream/handle/1874/14742/dullens_05_topological.pdf?sequence=1
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), 3195-3200.
https://dspace.library.uu.nl/bitstream/handle/1874/14768/1512.pdf?sequence=1
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, S3371-S3378.
https://dspace.library.uu.nl/bitstream/handle/1874/14771/1514.pdf?sequence=1
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, 1231-1233.
https://dspace.library.uu.nl/bitstream/handle/1874/14760/1504.pdf?sequence=1

2004

Scholarly publications

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), 658-664.
https://dspace.library.uu.nl/bitstream/handle/1874/14451/1457.pdf?sequence=1
Validzic, I. J., van Hooijdonk, G., Oosterhout, S., & Kegel, W. K. (2004). Thermodynamic stability of clusters of molybdenum oxide. Langmuir, 20, 3435-3440.
https://dspace.library.uu.nl/bitstream/handle/1874/14448/1463.pdf?sequence=1
Kegel, W. K., & van der Schoot, P. (2004). Competing hydrophobic and screened-Coulomb interactions in Hepatits B virus capsid assembly. Biophysical Journal, 86, 3905-3913.
https://dspace.library.uu.nl/bitstream/handle/1874/14459/1469.pdf?sequence=1
Simeonova, N., & Kegel, W. K. (2004). Gravity-induced aging in glasses of colloidal hard spheres. Physical Review Letters, 93(3), 1-4. Article 035701.
https://dspace.library.uu.nl/bitstream/handle/1874/14462/1471.pdf?sequence=1
Kegel, W. K. (2004). Equilibrium Clusters of Metal Oxides. Journal of Physical Chemistry A, 108, 1919-1922.
https://dspace.library.uu.nl/bitstream/handle/1874/14408/1460.pdf?sequence=1
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, 197-203.
https://dspace.library.uu.nl/bitstream/handle/1874/14458/1468.pdf?sequence=1
Groenewold, J., & Kegel, W. K. (2004). Colloidal cluster phases, gelation and nuclear matter. Journal of Physics: Condensed Matter, 16, S4877-S4886.
https://dspace.library.uu.nl/bitstream/handle/1874/14516/1483.pdf?sequence=1
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), 458-462. https://doi.org/10.1002/anie.200352339
Dullens, R. P. A., & Kegel, W. K. (2004). Reentrant surface melting of colloidal hard spheres. Physical Review Letters, 92(19), 1-4.
https://dspace.library.uu.nl/bitstream/handle/1874/14457/1467.pdf?sequence=1

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, 5963-5966.
Mladenovic, I. L., 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, 5717-5722.
https://dspace.library.uu.nl/bitstream/handle/1874/14373/1438.pdf?sequence=1
Simeonova, N., & Kegel, W. K. (2003). Real-space fluorescence recovery after photo-bleaching of concentrated suspensions of hard colloidal spheres. Faraday discussions, 123, 27-35.
https://dspace.library.uu.nl/bitstream/handle/1874/14374/1439.pdf?sequence=1
Bonn, D., & Kegel, W. K. (2003). Stokes-Einstein relations and the fluctuation-dissipation theorem in a supercooled colloidal fluid. Journal of Chemical Physics, 118(4), 2005-2009. https://doi.org/10.1063/1.1532349

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, 292-300.

2001

Scholarly publications

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, 037104.
https://dspace.library.uu.nl/bitstream/handle/1874/15230/kegel_01_two-step_melting.pdf?sequence=1
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, 347.
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, 021407-1.
Kegel, W. K. (2001). Freezing of hard spheres in confinement. Journal of Chemical Physics, 115(14), 6538.
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), 1407.
Groenewold, J., & Kegel, W. K. (2001). Anomalously large equilibrium clusters of colloids. Journal of Physical Chemistry. B, 105, 11702-11709.

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), 3431-3436.
Kegel, W. K., & van Blaaderen, A. (2000). Direct Observation of Dynamical Heterogeneities in Colloidal Hard-Sphere Suspensions. Science, 287, 290-293.
Kegel, W. K. (2000). Crystallization in glassy suspensions of colloidal hard spheres. Langmuir, 16, 939-941.

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), 5298-5301.
Kegel, W. K., Overbeek, J. T. G., & Lekkerkerker, H. N. W. (1999). Thermodynamics of microemulsions. In P. Kumar, & K. L. Mittal (Eds.), Microemulsions, fundamental and applied aspects (pp. 13-44)
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