Sela Samin

This page collects my work as a scientist trying to make sense of soft and complex systems. Most of the work was done between 2014 and 2018, when I was a post-doc in the group of Prof. René van Roij at the Institute for Theoretical Physics, Utrecht University.

My research focuses on theoretical studies at the interface of soft condensed matter and fluid mechanics. My scientific interests include multi-phase transport at small scales, active colloids, electrostatics and fluid dynamics in porous materials, and suspensions of charged and magnetic colloids.

Contact me

samin.linkedin (at)



  1. J. de Graaf and S. Samin. Hot Swimming using Table Salt: The Theory behind Self-Thermoelectrophoresis. (2018). arXiv
  2. Dynamic Stern layers in charge-regulating electrokinetic systems: three regimes from an analytical approach. Euro. Phys. J.: Special Topics, Accepted (2018). arXiv
  3. B. L. Werkhoven, J. C. Everts, S. Samin, and R. van Roij. Flow-Induced Surface Charge Heterogeneity in Electrokinetics due to Stern-Layer Conductance Coupled to Reaction Kinetics. Phys. Rev. Lett., 120:264502 (2018). arXiv
  4. B. Bet, S. Samin, R. Georgiev, H. B. Eral, and R. van Roij. Steering particles by breaking symmetries. J. Phys.: Condens. Matter, 30:224002 (2018). journal
  5. B. Bet, R. Georgiev, W. Uspal, H.B. Eral, R. van Roij, and S. Samin. Calculating the motion of highly confined, arbitrary-shaped particles in Hele-Shaw channels. Microfluid. Nanofluid., 22:77 (2018). arXiv
  6. 2017

  7. N. Tasios, S. Samin, R. van Roij, and M. Dijkstra. Microphase separation in oil-water mixtures containing hydrophilic and hydrophobic ions. Phys. Rev. Lett., 119:218001 (2017). arXiv
  8. J.R. Gomez-Solano, S. Samin, C. Lozano, P. Ruedas-Batuecas, R. van Roij, and C. Bechinger. Tuning the motility and directionality of self-propelled colloids. Sci. Rep., 7:14891 (2017). arXiv
  9. S. Samin and R. van Roij. Solvo-osmotic flow in electrolytic mixtures. J. Fluid Mech., 819:R1 (2017). arXiv
  10. S. Samin and R. van Roij. Interplay between adsorption and hydrodynamics in nanochannels: towards tunable membranes. Phys. Rev. Lett., 118:014502 (2017). arXiv
  11. S. Chung, S. Samin, C. Holm, J. G. Malherbe, and S. Amokrane. Dynamics of field-driven population inversion in a confined colloidal mixture. Phys. Rev. E, 95:022605 (2017). journal
  12. J.C. Everts, S. Samin, N.E. Elbers, J.E.S. van der Hoeven, A. van Blaaderen, and R. van Roij. Colloid-oil-water-interface interactions in the presence of multiple salts: charge regulation and dynamics. Phys. Chem. Chem. Phys., 19:14345 (2017). arXiv
  13. M. Hod, A. Dobroserdova, S. Samin, C. Dobbrow, A. M. Schmidt, M. Gottlieb, and S. Kantorovich. Dilution Effects on the Combined Magnetic and Electric Dipole Interactions: A Study on Ferromagnetic Cobalt Nanoparticles with Tuneable Interactions. J. Chem. Phys., 147:084901 (2017). journal
  14. 2016

  15. S. Faez, S. Samin, D. Baasanjav, S. Weidlich, M. Schmidt, and A.P. Mosk. Nanocapillary electrokinetic tracking for monitoring charge fluctuations on a single nanoparticle. Faraday Discuss., 193:447 (2016). journal
  16. J. C. Everts, S. Samin, and R. van Roij. Tuning Colloid-Interface Interactions by Salt Partitioning. Phys. Rev. Lett., 117:098002 (2016). arXiv
  17. S. Samin and Y. Tsori. Reversible pore gating in aqueous mixtures via external potential. Colloid Interface Sci. Commun., 12:9 (2016). arXiv
  18. J. C. Everts, M. T. J. J. M. Punter, S. Samin, P. van der Schoot, and R. van Roij. A Landau-de Gennes theory for hard colloidal rods: Defects and tactoids. J. Chem. Phys., 144:194901 (2016). arXiv
  19. V. Prymidis, S. Samin, and L. Filion. State behaviour and dynamics of self-propelled Brownian squares: a simulation study. Soft Matter, 12:4309 (2016). journal
  20. A. Härtel, S. Samin, and R. van Roij. Dense ionic fluids confined in planar capacitors: in- and out-of-plane structure from classical density functional theory. J. Phys.: Condens. Matter, 28:244007 (2016). arXiv
  21. 2015 and before

  22. S. Samin and R. van Roij. Self-propulsion mechanism of active Janus particles in near-critical binary mixtures. Phys. Rev. Lett., 115:188305 (2015). arXiv
  23. A. Härtel, M. Janssen, S. Samin and R. van Roij. Fundamental measure theory for the electric double layer: implications for blue-energy harvesting and water desalination. J. Phys.: Condens. Matter, 27:194129 (2015). arXiv
  24. S. Samin, M. Hod, E. Melamed, M. Gottlieb and Y. Tsori. Experimental Demonstration of the Stabilization of Colloids by Addition of Salt. Phys. Rev. Applied, 2:024008 (2014). arXiv
  25. J. Galanis, S. Samin, and Y. Tsori. Controlling the fluid-fluid mixing-demixing phase transition with electric field. In D.S. Dean, J. Dobnikar, A. Naji, and R. Podgornik, editors, Electrostatics of Soft and Disordered Matter. Pan Stanford Publishing, (2014).
  26. S. Samin and Y. Tsori. Stabilization of charged and neutral colloids in salty mixtures. J. Chem. Phys., 139:244905 (2013). arXiv
  27. S. Samin, Y. Tsori, and C. Holm. Vapor–liquid coexistence of the stockmayer fluid in nonuniform external fields. Phys. Rev. E, 87:052128 (2013). arXiv
  28. S. Samin and Y. Tsori. The interaction between colloids in polar mixtures above tc. J. Chem. Phys., 136:154908 (2012). arXiv
  29. S. Samin and Y. Tsori. Attraction between like-charge surfaces in polar mixtures. EPL, 95:36002 (2011). arXiv
  30. S. Samin and Y. Tsori. Vapor–liquid equilibrium in electric field gradients. J. Phys. Chem. B, 115:75 (2011). journal
  31. S. Samin and Y. Tsori. Stability of binary mixtures in electric field gradients. J. Chem. Phys., 131:194102 (2009). arXiv
  32. S. Samin, G. Marcus, and Y. Tsori. Phase-separation transition in binary mixtures near charged cylindrical surfaces. In P. G. J. Marro and P. I. Hurtado, editors, Proceedings of Modeling and Simulation of New Materials: Tenth Granada Lectures, AIP Conference Proceedings vol. 1091 (2009).
  33. G. Marcus, S. Samin, and Y. Tsori. Phase-separation transition in liquid mixtures near curved charged objects. J. Chem. Phys., 129:061101 (2008). arXiv