Big particles diffuse sl0wer than small particles, according to Einstein. Not so when they are embedded in a complex landscape. 

It is notoriously difficult to align collagen in a controlled way. We develloped a rheological protocol to do so, and align cells in the oriented collagen matrix.

Dispersions of slender rod-like viruses are vey viscous at at very low concentrations. We show how and why viscosity drops under the influence of shear, using a library of viruses, small-angle neutron scattering, rheology, and, last but not least, updated theory.

Other selected publications

Microstructural understanding of the length- and stiffness-dependent shear thinning in semi-dilute colloidal rods. C. Lang,  J. Kohlbrecher, L. Porcar,  A. Radulescu,  K. Sellinghoff,  J.K.G. Dhont, and M.P. Lettinga, Macromolecules52 , 9604-9612 (2019).

Competition Between Red Blood Cell Aggregation and Breakup: Depletion Force due to Filamentous Viruses vs. Shear Flow. O. Korculanin, T. Kochetkova, and M.P. Lettinga, Front Phys-Lausanne9 (2021).

Direct visualization of flow-induced conformational transitions of single actin filaments in entangled solutions. I. Kirchenbuechler, D. Guu, N.A. Kurniawan, G.H. Koenderink, and M.P. Lettinga, Nature Communications5, 5060 (2014).

Competition between shear banding and wall slip in wormlike micelles. M.P.Lettinga and S. Manneville,  Physical Review Letters103 , 248302 (2009). 

Self-diffusion of rodlike viruses through smectic layers. M.P. Lettinga and E. Grelet, Physical Review Letters99, 197802 (2007). 

Book chapters

Phase behavior of colloidal dispersions in shear flow. Chapter 6 in Fluids, Colloids and Soft Materials: An Introduction to Soft Matter Physics, First Edition. Edited by Alberto Fernandez Nieves and Antonio Manuel Puertas.© 2016 John Wiley & Sons, Inc. Published 2016 by John Wiley & Sons, Inc.

Light Microscopy. Vorlesungsmanuskripte für den 42.  IFF-Ferienkurs 2011. With S. U. Egelhaaf

The dynamics of rods in different phases, in Soft Matter From Synthetic to Biological Materials, Vorlesungsmanuskripte für den 39. IFF-Ferienkurs 2008.

Viruses as colloidal model systems, in Physics meets Biology, Vorlesungsmanuskripte für den 35. IFF-Ferienkurs 2004.

Phase Separation Kinetics, in Soft Matter, Complex Materials on Mesoscopic Scales, Vorlesungsmanuskripte für den 33. IFF-Ferienkurs 2002.

All publications



Dedroog, L. M., Deschaume, O., Abrego, C. J. G., Koos, E., de Coene, Y., Vananroye, A., . . . Lettinga, M. P. (2022). Stress-controlled shear flow alignment of collagen type I hydrogel systems.. Acta Biomater, 150, 128-137. doi:10.1016/j.actbio.2022.07.008

Yongabi, D., Khorshid, M., Losada-Perez, P., Sichani, S. B., Jooken, S., Stilman, W., . . . Wagner, P. (2022). Synchronized, Spontaneous, and Oscillatory Detachment of Eukaryotic Cells: A New Tool for Cell Characterization and Identification. ADVANCED SCIENCE, 18 pages. doi:10.1002/advs.202200459

Opdam, J., Guu, D., Schelling, M. P. M., Aarts, D. G. A. L., Tuinier, R., & Lettinga, M. P. (2022). Phase stability of colloidal mixtures of spheres and rods (vol 154, 204906, 2021). JOURNAL OF CHEMICAL PHYSICS, 156(20), 1 page. doi:10.1063/5.0097540




Korculanin, O., Westermeier, F., Hirsemann, H., Struth, B., Hermida-Merino, D., Wagner, U. H., . . . Lettinga, M. P. (2021). Anomalous dynamic response of nematic platelets studied by spatially resolved rheo-small angle x-ray scattering in the 1-2 plane. PHYSICS OF FLUIDS, 33(12), 13 pages. doi:10.1063/5.0069458

Korculanin, O., Kochetkova, T., & Lettinga, M. P. (2021). Competition Between Red Blood Cell Aggregation and Breakup: Depletion Force due to Filamentous Viruses vs. Shear Flow. FRONTIERS IN PHYSICS, 9, 10 pages. doi:10.3389/fphy.2021.721368

Garcia Abrego, C. J., Dedroog, L., Deschaume, O., Wellens, J., Vananroye, A., Lettinga, M. P., . . . Bartic, C. (n.d.). Multiscale Characterization of the Mechanical Properties of Fibrin and Polyethylene Glycol (PEG) Hydrogels for Tissue Engineering Applications. Macromolecular Chemistry And Physics. doi:10.1002/macp.202100366

Abakumov, S., Deschaume, O., Bartic, C., Lang, C., Korculanin, O., Dhont, J. K. G., & Lettinga, M. P. (2021). Uncovering Log Jamming in Semidilute Suspensions of Quasi-Ideal Rods. MACROMOLECULES, 54(20), 9609-9617. doi:10.1021/acs.macromol.1c00876

Corona, P. T., Silmore, K. S., Adkins, R., Lang, C., Lettinga, M. P., Swan, J. W., . . . Helgeson, M. E. (2021). Bayesian estimations of orientation distribution functions from small-angle scattering enable direct prediction of mechanical stress in anisotropic materials. PHYSICAL REVIEW MATERIALS, 5(6), 22 pages. doi:10.1103/PhysRevMaterials.5.065601

Chen, Y., Korculanin, O., Narayanan, S., Buitenhuis, J., Rogers, S. A., Leheny, R. L., & Lettinga, M. P. (2021). Probing nonlinear velocity profiles of shear-thinning, nematic platelet dispersions in Couette flow using x-ray photon correlation spectroscopy. PHYSICS OF FLUIDS, 33(6), 15 pages. doi:10.1063/5.0050942

Lettinga, M. P., Alvarez, L., Korculanin, O., & Grelet, E. (2021). When bigger is faster: A self-Van Hove analysis of the enhanced self-diffusion of non-commensurate guest particles in smectics. JOURNAL OF CHEMICAL PHYSICS, 154(20), 11 pages. doi:10.1063/5.0049093

Opdam, J., Guu, D., Schelling, M. P. M., Aarts, D. G. A. L., Tuinier, R., & Lettinga, M. P. (2021). Phase stability of colloidal mixtures of spheres and rods. JOURNAL OF CHEMICAL PHYSICS, 154(20), 12 pages. doi:10.1063/5.0048809




Jia, Y., Stiakakis, E., & Lettinga, M. P. (2020). Suppressed twist in droplets of cholesteric rod-like virus as identified by single particle imaging. LIQUID CRYSTALS, 48(5), 746-755. doi:10.1080/02678292.2020.1817584

Barabe, B., Abakumov, S., Gunes, D. Z., & Lettinga, M. P. (2020). Sedimentation of large particles in a suspension of colloidal rods. PHYSICS OF FLUIDS, 32(5), 8 pages. doi:10.1063/5.0006076

Lang, C., & Lettinga, M. P. (2020). Shear Flow Behavior of Bidisperse Rodlike Colloids. MACROMOLECULES, 53(7), 2662-2668. doi:10.1021/acs.macromol.9b02239

Garlea, I., Alvaredo, J., Dammone, O., Notenboom, V., Jia, Y., Koenderink, G., . . . Mulder, B. (2019). Colloidal Liquid Crystals Confined to Synthetic Tactoids. Scientific Reports, 9, 11 pages. doi:10.1038/s41598-019-56729-9

Lettinga, M. P., Lang, C., Kohlbrecher, J., Porcar, L., Sellinghof, K., Dhont, J., & Lettinga, M. P. (2019). Microstructural Understanding of the Length- and Stiffness- Dependent Shear Thinning in Semidilute Colloidal Rods. Macromolecules, 52, 9604-9612. doi:10.1021/acs.macromol.9b01592

Lang, C., Porcar, L., Kriegs, H., & Lettinga, M. P. (2019). A quest for shear banding in ideal and non ideal colloidal rods. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 52(7), 8 pages. doi:10.1088/1361-6463/aaf40c

Lang, C., Hendricks, J., Zhang, Z., Naveen, R. K., Rothstein, J. P., Lettinga, M. P., . . . Clasen, C. (2019). Effects of particle stiffness on the extensional rheology of model rod-like nanoparticle suspensions. Soft Matter, 15, 833-841. doi:10.1039/C8SM01925H

Klop, K. E., Dullens, R. P. A., Lettinga, M. P., Egorov, S. A., & Aarts, D. G. A. L. (2018). Capillary nematisation of colloidal rods in confinement. Molecular Physics, 116(21-22), 2864-2871. doi:10.1080/00268976.2018.1497210

Boire, A., Sanchez, C., Morel, M. -H., Lettinga, M. P., & Menut, P. (2018). Dynamics of liquid-liquid phase separation of wheat gliadins. SCIENTIFIC REPORTS, 8, 13 pages. doi:10.1038/s41598-018-32278-5

Grizzuti, N., Lee, D., Lettinga, M., Lin, Q., Liu, K., Liu, M., . . . Xu, S. (2018). Outstanding Reviewers for Soft Matter in 2017. SOFT MATTER, 14(17), 3220. doi:10.1039/c8sm90060d

Meier, G., Gapinski, J., Ratajczyk, M., Lettinga, M. P., Hirtz, K., Banachowicz, E., & Patkowski, A. (2018). Nano-viscosity of supercooled liquid measured by fluorescence correlation spectroscopy: Pressure and temperature dependence and the density scaling. JOURNAL OF CHEMICAL PHYSICS, 148(9), 8 pages. doi:10.1063/1.5011196

Ruiz-Franco, J., Marakis, J., Gnan, N., Kohlbrecher, J., Gauthier, M., Lettinga, M. P., . . . Zaccarelli, E. (2018). Crystal-to-Crystal Transition of Ultrasoft Colloids under Shear. Physical Review Letters, 120(7). doi:10.1103/PhysRevLett.120.078003

Tang, H., Kochetkova, T., Kriegs, H., Dhont, J. K. G., & Lettinga, M. P. (2018). Shear-banding in entangled xanthan solutions: tunable transition from sharp to broad shear-band interfaces. Soft Matter , 14(5), 826-836.

Àlvarez-Francés, L., Lettinga, P., & Grelet, E. (2017). Fast Diffusion of Long Guest Rods in a Lamellar Phase of Short Host Particles. Physical Review Letters , 118(17), 1-5. doi:10.1103/PhysRevLett.118.178002

Lettinga, P., Gaudino, D., Pasquale, R., Grizzuti, N., Pyckhout-Hintzen, W., Szekely., & Kriegs, H. (2017). Effect of the salt-induced micellar microstructure on the nonlinear shear flow behavior of ionic cetylpyridinium chloride surfactant solutions. Physical Review E , 95. doi:10.1103/PhysRevE.95.032603

Lettinga, P., Korculanin, O., Hirsemann, H., Hermida-Merino, D., Struth, B., & Rogers, S. (2017). Anomalous structural response of nematic colloidal platelets subjected to large amplitude stress oscillations. Physics of Fluids , 29. doi:10.1063/1.4975605

Lang, C., Kohlbrecher, J., Porcar, L., & Lettinga, P. (2016). The Connection between Biaxial Orientation and Shear Thinning for Quasi-Ideal Rods. Polymers – Basel , 8(8), 1-17. doi:10.3390/polym8080291

Baeza, G. P., Sharma, A., Louhichi, A., Imperiali, L., Appel, W. P. J., Fitie, C. F. C., . . . Vlassopoulos, D. (2016). Multiscale organization of thermoplastic elastomers with varying content of hard segments. Polymer, 107, 89-101. doi:10.1016/j.polymer.2016.11.010

Garlea, I. C., Mulder, P., Alvarado, J., Dammone, O., Aarts, D. G. A. L., Lettinga, P., . . . Mulder, B. M. (2016). Finite particle size drives defect-mediated domain structures in strongly confined colloidal liquid crystals. Nature Communications , 7. doi:10.1038/ncomms12112

Westermeier, F., Pennicard, D., Hirsemann, H., Wagner, U., Rau, C., Graafsma, H., . . . Struth, B. (2016). Connecting structure, dynamics and viscosity in sheared soft colloidal liquids: a medley of anisotropic fluctuations. Soft Matter , 12, 171-180. doi:10.1039/c5sm01707f

Welch, D., Lettinga, P., Ripoll, M., Dogic, Z., & Vliegenthart, G. (2015). Trains, tails and loops of partially adsorbed semi-flexible filaments. Soft Matter, 11, 7507-7514. doi:10.1039/c5sm01457c

Zhang, J., Dhont, J., Stiakakis, E., & Lettinga, P. (2014). Direct Visualization of Conformation and Dense Packing of DNA-Based Soft Colloids. Physical Review Letters , 113.

Kirchenbüchler, I., Guu, D., Kurniawan, N., Koenderink, G., & Lettinga, M. P. (2014). Direct visualization of flow-induced conformational transitions of single actin filaments in entangled solutions. Nature Communications, 5. doi:10.1038/ncomms6060

Pfleiderer, P., Baik, S. J., Zhang, Z., Vleminckx, G., Lettinga, P., Grelet, E., . . . Clasen, C. (2014). X-ray scattering in the vorticity direction and rheometry from confined fluids. Review of Scientific Instruments , 85(6). doi:10.1063/1.4881796

Lewis, A., Garlea, I., Alvarado, J., Dammone, O. J., Howell, P. D., Majumdar, A., . . . Aarts, D. G. A. (2014). Colloidal liquid crystals in rectangular confinement: theory and experiment. Soft Matter , 10, 7865-7873.

Naderi, S., Pouget, E., Ballesta, P., van der Schoot, P., Lettinga, P., & Grelet, E. (2013). Fractional Hoppinglike Motion in Columnar Mesophases of Semiflexible Rodlike Particles. Physical Review Letters , 111(3).

Guu, D., Dhont, J. K. G., & Lettinga, P. (2013). Dispersions and mixtures of particles with complex architectures in shear flow. European Physical Journal. Special Topics , 222(11), 2739-2755.

Reddy, N. K., Zhang, Z., Lettinga, P., Dhont, J., & Vermant, J. (2012). Probing structure in colloidal gels of thermo-reversible rod-like virus particles: Rheology and scattering. Journal of Rheology , 56(5), 1153-1174.

Rogers, S., Kohlbrecher, J., & Lettinga, P. (2012). The molecular origin of stress generation in worm-like micelles, using a rheo-SANS LAOS approach. Soft Matter , 8(30), 7831-7839.

Lettinga, P., Holmqvist, P., Ballesta, P., Rogers, S., Kleshchanok, D., & Struth, B. (2012). Nonlinear Behavior of Nematic Platelet Dispersions in Shear Flow. Physical Review Letters , 109(24).

Guu, D., Dhont, J. K. G., Vliegenthart, G. A., & Lettinga, P. (2012). Depletion induced clustering in mixtures of colloidal spheres and fd-virus. Journal of Physics – Condensed Matter , 24(46).

Dammone, O. J., Zacharoudiou, I., Dullens, R. P. A., Yeomans, J. M., Lettinga, P., & Aarts, D. G. A. L. (2012). Confinement Induced Splay-to-Bend Transition of Colloidal Rods. Physical Review Letters , 109(10).

Rogers, S. A., & Lettinga, P. (2012). A sequence of physical processes determined and quantified in large-amplitude oscillatory shear (LAOS): Application to theoretical nonlinear models. Journal of Rheology , 56(1), 1-25.

Blanco, P., Kriegs, H., Lettinga, P., Holmqvist, P., & Wiegand, S. (2011). Thermal Diffusion of a Stiff Rod-Like Mutant Y21M fd-Virus. Biomacromolecules , 12(5), 1602-1609.

Ballesta, P., Lettinga, P., & Manneville, S. (2011). Interplay between a hydrodynamic instability and a phase transition: the Faraday instability in dispersions of rodlike colloids. Soft Matter , 7(24), 11440-11446.

Lonetti, B., Tsigkri, A., Lang, P. R., Stellbrink, J., Willner, L., Kohlbrecher, J., & Lettinga, P. (2011). Full Characterization of PB-PEO Wormlike Micelles at Varying Solvent Selectivity. Macromolecules , 44(9), 3583-3593.

Pouget, E., Grelet, E., & Lettinga, P. (2011). Dynamics in the smectic phase of stiff viral rods. Physical Review E, Statistical, Nonlinear and Soft Matter Physics, 84(4). doi:10.1103/PhysRevE.84.041704

Dhont, J. K. G., Kang, K., Lettinga, P., & Briels, W. J. (2010). Shear-banding instabilities. Korea-australia Rheology Journal , 22(4), 291-308.

Lettinga, P., Dhont, J. K. G., Zhang, Z., Messlinger, S., & Gompper, G. (2010). Hydrodynamic interactions in rod suspensions with orientational ordering. Soft Matter , 6(18), 4556-4562.

Zhang, Z., Reddy, N. K., lettinga, P., Vermant, J., & Grelet, E. (2009). Reversible Gelation of Rod-Like Viruses Grafted with Thermoresponsive Polymers. Langmuir , 25(4), 2437-2442.

Holmqvist, P., Ratajczyk, M., Meier, G., Wensink, H. H., & Lettinga, P. (2009). Supersaturated dispersions of rodlike viruses with added attraction. Physical Review E, Statistical, Nonlinear and Soft Matter Physics, 80(3). doi:10.1103/PhysRevE.80.031402

Gapinski, J., Patkowski, A., Banchio, A. J., Buitenhuis, J., Holmqvist, P., Lettinga, P., . . . Naegele, G. (2009). Structure and short-time dynamics in suspensions of charged silica spheres in the entire fluid regime. Journal of Chemical Physics , 130(8).

Vavrin, R., Kohlbrecher, J., Wilk, A., Ratajczyk, M., Lettinga, P., Buitenhuis, J., & Meier, G. (2009). Structure and phase diagram of an adhesive colloidal dispersion under high pressure: A small angle neutron scattering, diffusing wave spectroscopy, and light scattering study. Journal of Chemical Physics , 130(15).

Lettinga, P., & Manneville, S. (2009). Competition between Shear Banding and Wall Slip in Wormlike Micelles. Physical Review Letters , 103(24).

Patkowski, A., Gapinski, J., Fluerasu, A., Holmqvist, P., Meier, G., Lettinga, P., & Naegele, G. (2008). Structure and dynamics of colloidal suspensions studied by means of XPCS. Acta Physica Polonica A , 114(2), 339-350.

Sprakel, J., Spruijt, E., Stuart, M. A. C., Besseling, N. A. M., Lettinga, P., & van der Gucht, J. (2008). Shear banding and rheochaos in associative polymer networks. Soft Matter , 4(8), 1696-1705. doi:10.1039/b803085e

Meier, G., Vavrin, R., Kohlbrecher, J., Buitenhuis, J., Lettinga, P., & Ratajczyk, M. (2008). SANS and dynamic light scattering to investigate the viscosity of toluene under high pressure up to 1800 bar. Measurement Science & Technology , 19(3).

Kang, K., Lettinga, P., & Dhont, J. K. G. (2008). Is vorticity-banding due to an elastic instability?. Rheologica Acta , 47(5), 499-508. doi:10.1007/s00397-007-0238-z

Grelet, E., Lettinga, P., Bier, M., van Roij, R., & van der Schoot, P. (2008). Dynamical and structural insights into the smectic phase of rod-like particles. Journal of Physics – Condensed Matter , 20(49). doi:10.1088/0953-8984/20/49/494213

Lonetti, B., Kohlbrecher, J., Willner, L., Dhont, J. K. G., & Lettinga, P. (2008). Dynamic response of block copolymer wormlike micelles to shear flow. Journal of Physics – Condensed Matter , 20(40). doi:10.1088/0953-8984/20/40/404207

Ripoll, M., Holmqvist, P., Winkler, R. G., Gompper, G., Dhont, J. K. G., & Lettinga, P. (2008). Attractive Colloidal Rods in Shear Flow. Physical Review Letters , 101(16). doi:10.1103/PhysRevLett.101.168302

Rediguieri, C. F., de Freitas, O., Lettinga, P., & Tuinier, R. (2007). Thermodynamic incompatibility and complex formation in pectin/caseinate mixtures. Biomacromolecules , 8(11), 3345-3354. doi:10.1021/bm7004438

Ballesta, P., Lettinga, P., & Manneville, S. (2007). Superposition rheology of shear-banding wormlike micelles. Journal of Rheology , 51(5), 1047-1072. doi:10.1122/1.2750665

Lettinga, P., & Grelet, E. (2007). Self-diffusion of rodlike viruses through smectic layers. Physical Review Letters , 99(19). doi:10.1103/PhysRevLett.99.197802

Gapinski, J., Patkowski, A., Banchio, A. J., Holmqvist, P., Meier, G., Lettinga, P., & Naegele, G. (2007). Collective diffusion in charge-stabilized suspensions: Concentration and salt effects. Journal of Chemical Physics , 126(10). doi:10.1063/1.2538891

Kang, K., Lettinga, P., Dogic, Z., & Dhont, J. K. G. (2006). Vorticity banding in rodlike virus suspensions. Physical Review E, Statistical, Nonlinear and Soft Matter Physics , 74(2). doi:10.1103/PhysRevE.74.026307

Lettinga, P., Kang, K. O., Holmqvist, P., Imhof, A., Derks, D., & Dhont, J. K. G. (2006). Nematic-isotropic spinodal decomposition kinetics of rodlike viruses. Physical Review E, Statistical, Nonlinear and Soft Matter Physics, 73(1), 7 pages. doi:10.1103/PhysRevE.73.011412

van der Gucht, J., Lemmers, M., Knoben, W., Besseling, N. A. M., & Lettinga, P. (2006). Multiple shear-banding transitions in a supramolecular polymer solution. Physical Review Letters , 97(10). doi:10.1103/PhysRevLett.97.108301

Banchio, A. J., Gapinski, J., Patkowski, A., Haussler, W., Fluerasu, A., Sacanna, S., . . . Nagele, G. (2006). Many-body hydrodynamic interactions in charge-stabilized suspensions. Physical Review Letters , 96(13). doi:10.1103/PhysRevLett.96.138303

Kohlbrecher, J., Buitenhuis, J., Meier, G., & Lettinga, P. (2006). Colloidal dispersions of octadecyl grafted silica spheres in toluene: A global analysis of small angle neutron scattering contrast variation and concentration dependence measurements. Journal of Chemical Physics , 125(4). doi:10.1063/1.2220564

Lettinga, M. P., Dogic, Z., Wang, H., & Vermant, J. (2005). Flow behavior of colloidal rodlike viruses in the nematic phase. Langmuir , 21(17), 8048-8057.

Lettinga, P., Barry, E., & Dogic, Z. (2005). Self-diffusion of rod-like viruses in the nematic phase. Europhysics Letters , 71(4), 692-698. doi:10.1209/epl/i2005-10127-x

Lettinga, P., Kang, K., Imhof, A., Derks, D., & Dhont, J. K. G. (2005). Kinetic pathways of the nematic-isotropic phase transition as studied by confocal microscopy on rod-like viruses. Journal of Physics – Condensed Matter , 17(45). doi:10.1088/0953-8984/17/45/055

Kang, K., Gapinski, J., Lettinga, P., Buitenhuis, J., Meier, G., Ratajczyk, M., . . . Patkowski, A. (2005). Diffusion of spheres in crowded suspensions of rods. Journal of Chemical Physics , 122(4). doi:10.1063/1.1834895

Holmqvist, P., Lettinga, P., Buitenhuis, J., & Dhont, J. K. G. (2005). Crystallization kinetics of colloidal spheres under stationary shear flow. Langmuir , 21(24), 10976-10982. doi:10.1021/la051490h

Lettinga, P., Koenderink, G. H., Kuipers, B. W. M., Bessels, E., & Philipse, A. P. (2004). Rotational dynamics of colloidal spheres probed with fluorescence recovery after photobleaching. Journal of Chemical Physics , 120(9), 4517-4529. doi:10.1063/1.1644799

Lettinga, P., & Dhont, J. K. G. (2004). Non-equilibrium phase behaviour of rod-like viruses under shear flow. Journal of Physics – Condensed Matter , 16(38). doi:10.1088/0953-8984/16/38/011

Lettinga, P., Wang, H., & Dhont, J. K. G. (2004). Microstructural response of a near-critical colloid-polymer mixture to shear flow. Physical Review E, Statistical, Nonlinear and Soft Matter Physics , 70(6).

Dhont, J. K. G., Lettinga, P., Dogic, Z., Lenstra, T. A. J., Rathgeber, S., Carletto, P., . . . Lindner, P. (2003). Shear-banding and microstructure of colloids in shear flow. Faraday Discussions , 123, 157-172. doi:10.1039/b205039k

Koenderink, G. H., Zhang, H. Y., Aarts, D. G. A. L., Lettinga, P., Philipse, A. P., & Nagele, G. (2003). On the validity of Stokes-Einstein-Debye relations for rotational diffusion in colloidal suspensions. Faraday Discussions , 123, 335-354. doi:10.1039/b204668g

Koenderink, G. H., Lettinga, P., & Philipse, A. P. (2002). Rotational dynamics of charged colloidal spheres: Role of particle interactions. Journal of Chemical Physics , 117(16), 7751-7764. doi:10.1063/1.1509054

Wang, H., Lettinga, P., & Dhont, J. K. G. (2002). Microstructure of a near-critical colloidal dispersion under stationary shear flow. Journal of Physics – Condensed Matter , 14(33), 7599-7615. doi:10.1088/0953-8984/14/33/304

Koenderink, G. H., Zhang, H. Y., Lettinga, P., Nagele, G., & Philipse, A. P. (2001). Rotational tracer diffusion in binary colloidal sphere mixtures. Physical Review E, Statistical, Nonlinear and Soft Matter Physics , 64(2). doi:10.1103/PhysRevE.64.022401

Lettinga, P., van Kats, C. M., & Philipse, A. P. (2000). Rotational diffusion of tracer spheres in packings and dispersions of colloidal spheres studied with time-resolved phosphorescence anisotropy. Langmuir , 16(15), 6166-6172. doi:10.1021/la991603v

Lettinga, P., van Zandvoort, M. A. M. J., van Kats, C. M., & Philipse, A. P. (2000). Phosphorescent colloidal silica spheres as tracers for rotational diffusion studies. Langmuir , 16(15), 6156-6165. doi:10.1021/la9916023

Lettinga, P., Han, Z. H., & van Zandvoort, M. A. M. J. (2000). Phosphorescence and fluorescence characterization of fluorescein derivatives immobilized in various polymer matrices. Physical Chemistry Chemical Physics , 2(16), 3697-3707. doi:10.1039/a909707d

Lettinga, P., Klarenbeek, E. M., Zuilhof, H., & van Zandvoort, M. A. M. J. (1999). The orientation of the phosphorescence dipole moment of erythrosine B within its molecular frame. Journal of Fluorescence , 9(3), 265-279. doi:10.1023/A:1022520003775




BARBON, A., Lettinga, P., & NORDIO, P. L. (1995). ANALYSIS OF TEMPERATURE-DEPENDENT FLUORESCENCE POLARIZATION FOR DIMETHYLAMINOBENZONITRILE. Chemical Physics , 200(1), 41-47. doi:10.1016/0301-0104(95)00248-M