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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-82@lptms.universite-paris-saclay.fr
DTSTART:20121211T110000Z
DTEND:20121211T120000Z
DTSTAMP:20121210T102432Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-thomas-salez/
SUMMARY:Séminaire du LPTMS: Thomas Salez - LPTMS\, salle 201\, 2ème étag
 e\, Bât 100\, Campus d'Orsay - 11 Déc 12 11:00
DESCRIPTION:Polymers in Flatland: Self-Similarity and Nanorheology\nThomas 
 Salez\, ENS/ESPCI\nThe study of ultra-thin polymer nanofilms is a rich an
 d productive field for applied mathematics\, fundamental physics\, physio
 logy and engineering. It has been enlightened by the recent results on dew
 etting\, nanoindentation\, electrostatic instabilities and micro-bubbles. 
 We report here on a novel and simple technique based on capillary leveling
  of a thin polystyrene stepped film far above the glass transition temper
 ature [1]. We present as well the analytical [2] and numerical [3] tools t
 hat allow one to precisely understand the experimental profiles in variou
 s conditions. In particular\, we study the self-similar intermediate asymp
 totics of the solutions and we describe how they provide a direct and accu
 rate viscosity probe for polymer materials and viscous flows in general. F
 inally\, we show how those solutions can give quantitative insights on fun
 damental questions such as : the effect of confinement on the macromolecu
 lar mobility\, the slip condition at the substrate in hydrodynamics\, the 
 spreading of a droplet onto a precursor film [4]\, or the evolution of th
 e superficial mobility through the glass transition.\n[1] McGraw\, Salez\
 , Baumchen\, Raphael\, Dalnoki-Veress\, PRL 109 128303 (2012) [2] Salez\, 
 McGraw\, Baumchen\, Dalnoki-Veress\, Raphael\, PoF in press (2012) [3] Sal
 ez\, McGraw\, Cormier\, Baumchen\, Dalnoki-Veress\, Raphael\, EPJE in pres
 s (2012) [4] Cormier\, McGraw\, Salez\, Baumchen\, Raphael\, Dalnoki-Veres
 s\, PRL 109 154501 (2012)
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
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  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
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