BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//wp-events-plugin.com//6.4.7.2//EN
TZID:Europe/Paris
X-WR-TIMEZONE:Europe/Paris
BEGIN:VEVENT
UID:1-498@lptms.universite-paris-saclay.fr
DTSTART:20170322T110000Z
DTEND:20170322T120000Z
DTSTAMP:20170321T081600Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/physics-biology-i
 nterface-seminar-greg-grason/
SUMMARY:Physics-Biology interface seminar: Greg Grason - LPTMS\, salle 201\
 , 2ème étage\, Bât 100\, Campus d'Orsay - 22 Mar 17 11:00
DESCRIPTION:Block Copolymer Assemblies Beneath the Surface: Modeling Intra-
 Domain Textures and Chirality Transfer to Mesodomains\nGreg Grason (U. of 
 Massachussets\, Amherst)\nThis seminar replaces that of Thierry Bizebard\,
  was rescheduled to May 31st. Please note the more soft matter focus.\n\nS
 elf-assembled block copolymer (BCP) melts are a chemically-versatile platf
 orm for generating a rich spectrum of periodically-ordered nanostructures 
 of various morphologies\, from arrays of layers and columns to cubic array
 s of spheres and bicontinuous networks. They are also a model system for u
 nderstanding processes and properties of self-assemblies\, more broadly. D
 ecades of study of BCP assembly have uncovered the principles that connect
  molecular BCP structure to the translational order of the (scalar) compos
 ition profiles in the ordered states. In this talk\, I will describe recen
 t efforts to understand the generic\, yet poorly known\, patterns of orien
 tational ordering of constituent chain segments that underlie the otherwis
 e well-known “standard” BCP morphologies1. From generic properties of 
 the random-walk statistics in BCPs\, we show that the direction and degree
  of alignment of segments varies non-trivially from place-to-place in self
 -organized domains\, and from one morphology to another\, leading to new o
 pportunities to manipulate and harness the physics sub-domain textures. Sp
 ecifically\, I will discuss how our efforts to model chiral BCPs2 which ha
 ve been observed to transfer handedness of chain chemistry to the chiral s
 ymmetry of mesodomain shapes that are not formed in achiral BCPs. Our gene
 ralized orientational self-consistent field (oSCF) theory framework3 shows
  that the thermodynamic drive for twisted\, or cholesteric\, packings of s
 egments of chiral blocks stabilizes observed helical cylinder morphologies
 \, and suggests new mechanisms for driving formation as of yet\, unobserve
 d mesochiral domain symmetries4.\n\nReferences\n\n	I. Prasad\, Y. Seo\, L.
  Hall and G. M. Grason arxiv.org/1612.07994 (2016)\n	G. M. Grason ACS Macr
 oLetters 4\, 526 (2015). Front Cover Story\n	W. Zhao\, T. Russell and G. M
 . Grason\, J. Chem. Phys. 137\, 104911 (2012).\n	W. Zhao\, T. Russell and 
 G. M. Grason\, Phys. Rev. Lett. 110\, 058301 (2013).\n
CATEGORIES:physbio,seminars
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=15 Rue Georges Clemenceau\,
  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
END:VEVENT
END:VCALENDAR