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DTSTART:20260329T030000
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DTSTAMP:20260424T143507Z
UID:68776e696ce62156687372@ist.ac.at
DTSTART:20260319T110000
DTEND:20260319T120000
DESCRIPTION:Speaker: Thomas Salez\nhosted by Jérémie Palacci\nAbstract: C
 olloidal motions near complex boundaries are ubiquitous in fundamental phy
 sics and biology\, as well as in industrial applications. This class of pr
 oblems invariably involves the intricate coupling between confined fluid f
 lows\, soft boundaries\, charges\, external forces and fluctuations. Using
  a combination of interferometric microscopy and advanced statistical infe
 rence\, we address such a coupling in two main situations. First\, we cons
 ider the Brownian motion of a rigid particle near a rigid wall. All the ke
 y statistical-physics observables are reconstructed with high precision\, 
 allowing for nanoscale resolution of local mobilities and femtonewton infe
 rence of conservative and nonconservative forces. Furthermore\, we charact
 erize the displacement non-Gaussianities induced by the flow boundary cond
 ition at the wall\, and their drastic consequences on target-finding dynam
 ics. Then\, we investigate the Brownian motion of soft micrometric oil dro
 plets near rigid walls. The analysis reveals the existence of a novel\, tr
 ansient but large\, soft-Brownian force. The latter might be of importance
  for microbiological and nanophysical transport\, as well as for chemical 
 reactions in crowded environments and hence the whole life machinery.
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Thomas Salez: Brownian motion near complex interfaces
URL:https://talks-calendar.ista.ac.at/events/6356
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