255 citations · 1.5k across the 27 of their papers we have counts for
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Polarization of active Janus particles
Thomas Bickel, Guillermo Zecua, Alois Würger
We study the collective motion of Janus particles in a temperature or concentration gradient. Because of the torque exerted by an external or self-generated field, the particles al…
Trapping energy of a spherical particle on a curved liquid interface
Joseph Léandri, Alois Würger
We derive the trapping energy of a colloidal particle at a liquid interface with contact angle h and principal curvatures c1 and c2. The boundary conditions at the particle surface…
Collective thermoelectrophoresis of charged colloids
Arghya Majee, Alois Würger
Thermally driven colloidal transport is, to a large extent, due to the thermoelectric or Seebeck effect of the charged solution.We show that, contrary to the generally adopted sing…
Thermodiffusion in binary liquids: the role of irreversibility
Alois Würger
We study thermal diffusion in binary mixtures in the framework of non-equilibrium thermodynamics. Our formal result displays the role of partial enthalpies and Onsager's generalize…
Stokes-Einstein diffusion of colloids in nematics
Frédéric Mondiot, Jean-Christophe Loudet, Olivier Mondain-Monval +3
We report the experimental observation of anisotropic diffusion of polystyrene particles immersed in a lyotropic liquid crystal with two different anchoring conditions. Diffusion i…
Leidenfrost Gas Ratchets Driven by Thermal Creep
Alois Würger
We show that thermal creep is at the origin of the recently discovered Leidenfrost ratchet, where liquid droplets float on a vapor layer along a heated sawtooth surface and acceler…
Transport in Charged Colloids Driven by Thermoelectricity
Alois Würger
We study the thermal diffusion coefficient DT of a charged colloid in a temperature gradient, and find that it is to a large extent determined by the thermoelectric response of the…
Charging of Heated Colloidal Particles Using the Electrolyte Seebeck Effect
Arghya Majee, Alois Würger
We propose a novel actuation mechanism for colloids, which is based on the Seebeck effect of the electrolyte solution: Laser heating of a nonionic particle accumulates in its vicin…
Flow pattern in the vicinity of self-propelling hot Janus particles
Thomas Bickel, Arghya Majee, Alois Würger
We study the temperature field and the resulting flow pattern in the vicinity of a heated metal-capped Janus particle. If its thickness exceeds about 10 nm, the cap forms an isothe…
Specific Salt Effects on Thermophoresis of Charged Colloids
Kyriakos A. Eslahian, Arghya Majee, Michael Maskos +1
We study the Soret effect of charged polystyrene particles as a function of temperature and electrolyte composition. As a main result we find that the Soret coefficient is determin…