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SUMMARY:Contr. Talk 1 - Sedimentation Induced Flow and Anomalous Dynamics 
 in Field Driven Self-assembly of Magnetic Colloids Studied by XPCS
DTSTART;VALUE=DATE-TIME:20181210T131000Z
DTEND;VALUE=DATE-TIME:20181210T133000Z
DTSTAMP;VALUE=DATE-TIME:20260523T113053Z
UID:indico-contribution-497@lindico453.srv.lu.se
DESCRIPTION:Speakers: Antara Pal (Division of Physical Chemistry\, Lund Un
 iversity)\nWe have studied the non-equilibrium dynamics of self-assembled 
 magnetic peanut-shaped colloids in the presence of a magnetic field. The m
 icrometre‐sized particles align in a direction perpendicular to the appl
 ied external magnetic field\, and assemble into chains along the field dir
 ection. The anisotropic dynamics of these particles is investigated using 
 multispeckle ultrasmall‐angle X‐ray photon correlation spectroscopy (U
 SA‐XPCS). Perpendicular to the applied field\, which is also the directi
 on of gravity\, a sedimentation induced flow develops. XPCS allows us to i
 nvestigate the resulting anisotropic dynamics\, and in particular to decou
 ple contributions from the sedimentation induced flow\, thermal diffusion 
 of the assembled chains and individual particles\, and the internal collec
 tive dynamics of the assembled mesoscopic structures over a large range of
  length scales. Our experiments demonstrate the power of XPCS to investiga
 te complex dynamic processes that arise due to a combination of diffusive 
 and flow-induced processes. Given the very small scattering volume probed 
 in an XPCS experiments\, this opens up interesting possibilities for inves
 tigation spatially heterogeneous dynamics in highly turbid media that cann
 ot be probed with optical techniques.\n\nhttps://lindico453.srv.lu.se/even
 t/67/contributions/497/
LOCATION:Elite Hotel Ideon Tera
URL:https://lindico453.srv.lu.se/event/67/contributions/497/
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