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PRODID:-//Memento EPFL//
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SUMMARY:Unveiling self-phoretic colloidal propulsion
DTSTART;VALUE=DATE:20251203
DTSTAMP:20260525T100722Z
UID:7c3da8a6f955c3d7722b9796bf60b6f1bf9ab9b2c395305d65cc306e
CATEGORIES:Conferences - Seminars
DESCRIPTION:You can apply to participate and find all the relevant informa
 tion (speakers\, abstracts\, program\,...) on the event website: https://
 www.cecam.org/workshop-details/unveiling-self-phoretic-colloidal-propulsio
 n-1378.\n\nRegistration is required to attend the full event\, take part i
 n the social activities and present a poster at the poster session (if any
 ).  However\, the EPFL community is welcome to attend specific lectu
 res without registration if the topic is of interest to their research. Do
  not hesitate to contact the CECAM Event Manager if you have any questio
 n.\n\nDescription\n\nPhoretic transport refers to the propulsion of colloi
 dal particles driven by local gradients of scalar fields such as solute co
 ncentration\, electrostatic field\, or temperature. When the particle itse
 lf is capable of generating such gradients we speak of self-phoretic collo
 idal transport. This phenomenon has sparked significant research efforts 
 in recent years to understand its fundamental mechanisms and implications 
 through theory\, simulations and experiments. In addition\, applied resear
 ch on micro/nanorobots has experienced important progress in view of the p
 ossible applications in a range of technologies (e.g. drug delivery system
 s). \nPhoretic —and self-phoretic— transport of colloids is generally
  understood from a hydrodynamic perspective as driven by interfacial tange
 ntial flows originated by the interaction of the particle’s surface and 
 the surrounding liquid within a very thin layer. To understand the underly
 ing mechanisms of transport in the different kinds of self-phoresis and de
 epen the hydrodynamic description\, extensive numerical work has been perf
 ormed. A variety of simulation techniques have been employed to investigat
 e through a range of time and lengthscales the effects of local gradients 
 on colloidal self-propulsion. These include simulation methods such as Bro
 wnian Dynamics\, Stokesian Dynamics\, Multi-Particle Collision Dynamics\, 
 Lattice-Boltzmann\, Dissipative Particle dynamics\, or Molecular Dynamics.
  As a result of these investigations evidence has accumulated showing that
  propulsion in self-phoretic systems can be influenced and perhaps dominat
 ed by a competition of physico-chemical effects. For example\, propulsion 
 due to the flow field caused by a sudden localized volume expansion in the
  fluid or by osmotic pressure gradients have been recently discussed. Othe
 r well-known results showed that direct solvent-colloid momentum transfer 
 in asymmetric exothermic chemical reactions can be a source of self-propul
 sion. Morevoer\, the  surface properties can completely change the reacti
 on pathways taken place on them and be also key to determine the dominant 
 phoretic mechanism.  Recent investigations revealed the importance of Mar
 angoni stresses on self-propulsion of colloids at liquid-liquid interfaces
 . In addition\, research was done to reduce self-phoretic particles to the
  nanoscale\, a challenge in the field. In this regime\, the mechanisms wh
 ich originate local field gradients should be different from those of micr
 oparticles\, and the understanding of propulsion might be influenced by th
 e molecular nature of the solvent. \nA detailed description of self-pho
 retic propulsion and of the fields involved (hydrodynamic flow\, but also 
 the solute concentration\, temperature or electrostatic field) is also imp
 ortant to determine the nature of the mutual interactions between self-pho
 retic particles. The interplay of these fields at different scales –from
  the nano to the mesoscale–\, plays a determinant role in the emergence
  of collective behavior in suspensions of self-phoretic agents. This point
  is crucial to understand dense systems of self-propelling particles\, 
 known to exhibit a very rich phenomenology including out-of-equilibrium p
 hase transitions.  \nAt this point\, and despite the advances made\, we l
 ack a clear unifying picture of the different effects which contribute to 
 transport in self-phoretic systems. Without that description\, a realistic
  account of interactions between self-phoretic agents is not possible.  I
 n this context\, exchanging ideas and brainstorming new ones on self-phore
 sis from different perspectives and scales is thus a crucial and timely to
 pic at the leading edge of research\, and one that would benefit from in-d
 epth discussion. This is the aim of the workshop. \n\nReferences\n\n[1] J
 . Anderson\, Annu. Rev. Fluid Mech.\, 21\, 61-99 (1989)\n[2] R. Golestani
 an\, T. Liverpool\, A. Ajdari\, New J. Phys.\, 9\, 126-126 (2007)\n[3] C.
  Bechinger\, R. Di Leonardo\, H. Löwen\, C. Reichhardt\, G. Volpe\, G. Vo
 lpe\, Rev. Mod. Phys.\, 88\, 045006 (2016)\n[4] J. Moran\, J. Posner\, An
 nu. Rev. Fluid Mech.\, 49\, 511-540 (2017)\n[5] G. Gompper\, R. Winkler\,
  T. Speck\, A. Solon\, C. Nardini\, F. Peruani\, H. Löwen\, R. Golestania
 n\, U. Kaupp\, L. Alvarez\, T. Kiørboe\, E. Lauga\, W. Poon\, A. DeSimone
 \, S. Muiños-Landin\, A. Fischer\, N. Söker\, F. Cichos\, R. Kapral\, P.
  Gaspard\, M. Ripoll\, F. Sagues\, A. Doostmohammadi\, J. Yeomans\, I. Ara
 nson\, C. Bechinger\, H. Stark\, C. Hemelrijk\, F. Nedelec\, T. Sarkar\, T
 . Aryaksama\, M. Lacroix\, G. Duclos\, V. Yashunsky\, P. Silberzan\, M. Ar
 royo\, S. Kale\, J. Phys.: Condens. Matter\, 32\, 193001 (2020)\n[6] F. S
 agués Mestre\, Colloidal Active Matter\, 2022\n[7] S. Eloul\, W. Poon\, O
 . Farago\, D. Frenkel\, Phys. Rev. Lett.\, 124\, 188001 (2020)\n[8] M. De
  Corato\, X. Arqué\, T. Patiño\, M. Arroyo\, S. Sánchez\, I. Pagonabarr
 aga\, Phys. Rev. Lett.\, 124\, 108001 (2020)\n[9] G. Elfring\, J. Brady\,
  J. Fluid Mech.\, 952\, A19 (2022)\n[10] C. Calero\, E. Sibert III\, R. R
 ey\, Nanoscale\, 12\, 7557-7562 (2020)\n[11] J. Palacci\, S. Sacanna\, A.
  Steinberg\, D. Pine\, P. Chaikin\, Science\, 339\, 936-940 (2013)\n[12] 
 K. Dietrich\, N. Jaensson\, I. Buttinoni\, G. Volpe\, L. Isa\, Phys. Rev. 
 Lett.\, 125\, 098001 (2020)\n[13] A. Solon\, J. Stenhammar\, R. Wittkowsk
 i\, M. Kardar\, Y. Kafri\, M. Cates\, J. Tailleur\, Phys. Rev. Lett.\, 11
 4\, 198301 (2015)\n[14] K. Zhang\, J. Fraxedas\, B. Sepulveda\, and M. J. 
 Esplandiu\, ACS Appl. Mater. Interfaces\, 9\, 51\, 44948 (2017)
LOCATION:BCH 2103 https://plan.epfl.ch/?room==BCH%202103
STATUS:CONFIRMED
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