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SUMMARY:Ions at surfaces: the decisive role of hydration water
DTSTART:20130923T110000
DTSTAMP:20260428T061524Z
UID:46a0abbbf95785ad3ce32c5e8a33a51a2e2e21b67c11229aaf4bf6d9
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Jordi Faraudo\, Institut de Ciència de Materials de Barce
 lona (Prof. Eyal Heifetz)\nThere is growing evidence that water mediated e
 ffects play a substantial (even dominant) effect in colloidal and surface 
 interactions in electrolyte solutions. For example\, hydrophilic systems s
 how enhanced stability due to the hydration force\, a repulsive interactio
 n whose molecular origin is still controversial.  Ions adsorb at interfac
 es (or are repeled from them) depending on the relative hydration properti
 es of the surfaces and the ions. The effect can be strong enough to induce
  giant charge reversal of the surface charge at an interface. Even for the
  case of multivalent ions\, in which electrostatic correlations were suppo
 sed to dominate\, the surface-ion interaction can be driven by solvation e
 ffects.\nIn this talk\, I’ll show a few examples of these phenomena\, in
 cluding experimental results and their microscopic interpretation coming f
 rom MD simulations.
LOCATION:INM201 http://plan.epfl.ch/?lang=en&room=INM201
STATUS:CONFIRMED
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