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SUMMARY:IMX/IPHYS Talks - Unravelling the multiscale surface mechanics of 
 soft solids
DTSTART:20250430T140000
DTEND:20250430T150000
DTSTAMP:20260430T220208Z
UID:8cef2f036fa2c4c4ed3a071d1c17ecba217774568c93b2cc459bb690
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Nicolas Bain\, Institut Lumière Matière\, Lyon\nThe mech
 anics of soft solid interfaces is key to the response of many natural and
  artificial systems at small scales. Yet\, their underlying properties ar
 e vigorously debated\, particularly for polymer networks. While molecular-
 scale theory predicts no interfacial changes with macroscopic deformation\
 , multiple experiments suggest that interfacial tension increases with str
 ain. In this presentation\, I will detail two experimental systems that ai
 m at settling this issue. This first one exploits the topography of rough 
 surfaces under stretch\, and the second focuses on the measurement of disp
 lacement fields near the interface of a deformed silicone gel. Their resu
 lts demonstrate that the mechanical response of soft polymeric solids is i
 ntrinsically multi-scale\, and that the interfacial elastic properties are
  modulated by the composition of the outer medium.\n\nBio: Nicolas Bain is
  a CNRS Researcher at the Institut Lumière Matière\, in Lyon. After stud
 ying at the École Polytechnique\, where he specialised in Mechanical Engi
 neering\, he went on to do a Master's degree in Civil and Environmental En
 gineering at MIT\, and a PhD at the Physics Laboratory of the ENS in Lyon 
 entitled ‘Hydrodynamics of polarized crowds\, experiments and theory’.
  He then spent four years as a post-doctoral fellow in the Materials Scien
 ce department at ETH Zürich\, where he focused on the interfacial mechani
 cs of polymer gels.\n\nHis research focuses on two themes\, at the crossro
 ads of physics and mechanics. Active matter\, and the mechanics soft solid
 s. In both areas\, he has designed model experiments\, developed advanced 
 analysis tools\, and used continuous theories to quantify fundamental beha
 viours that were previously inaccessible. Recently\, he has been developin
 g micromechanics experiments\, which measure 3D deformations inside transp
 arent polymer solids\, with the aim of understanding the mechanical respon
 se of heterogeneous materials.\n 
LOCATION:BM 5202 https://plan.epfl.ch/?room==BM%205202 https://epfl.zoom.u
 s/j/61220432731
STATUS:CONFIRMED
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