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SUMMARY:Two stories on Ostwald ripnening in microfluidic devices
DTSTART:20171002T131500
DTEND:20171002T141500
DTSTAMP:20260916T003933Z
UID:ed5b3110d384245e4d9ddf5187fa564086ba538b43d1dbda905622a1
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Charles Baroud\, Ecole Polytechnique\, Palaiseau cedex - Fr
 ance\nI will first discuss the mechanical resistance of an armoured bubble
 \, as a microscopic model of a pickering emulsion. In particular I will sh
 ow measurements that contradict the classical elastic models of particle s
 hells. Instead we find scalings that show that the shell behaves in a plas
 tic way\, which has important implications on the stability of Pickering e
 mulsions. Next I will discuss the transition of how a highly monodisperse 
 population of bubbles reaches the self-similar regime of ripening foams. T
 he transition is found to take place through two successive dynamical regi
 mes\; the first corresponds to the nucleation and growth of disordered reg
 ions\, followed by a second period that sees the increase in the polydispe
 rsity within these regions.\n\n** References **\n\n-- Taccoen\, N.\, Leque
 ux\, F.\, Gunes\, D. Z. & Baroud\, C. N. Probing the Mechanical Strength o
 f an Armored Bubble and Its Implication to Particle-Stabilized Foams. Phys
 . Rev. X 6\, 11010 (2016).\n\n-- Dangla\, R.\, Kayi\, S. C. & Baroud\, C. 
 N. Droplet microfluidics driven by gradients of confinement. Proc. Natl. A
 cad. Sci. 110\, 853–858 (2013).\n\n\nBio: Charles Baroud was trained as 
 a physicist and engineer at MIT\, then received a PhD at the University of
  Texas at Austin. Since then he has founded and now leads the microfluidic
 s group at Ecole Polytechnique in Paris. The group has performed fundament
 al fluid dynamics research on multiphase flows in complex geometries\, as 
 well as developing a variety of technological approaches for droplet micro
 fluidics. This has led to a scientific production of over 50 articles and 
 8 patents. In 2012 Charles Baroud received an ERC starting grant to develo
 p applications of the microfluidic technologies for cell biology. This tra
 nsition has now been completed with projects now exploring the drug resist
 ane of bacteria\, the 3D culture of mammalian cells\, or the exploration o
 f single-cell behavior. He is also co-founder and scientific advisor to St
 illa Technologies\, a spinoff from the Polytechnique lab that now commerci
 alises a digital-PCR platform.\n\n 
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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