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DTSTAMP:20260404T133058Z
UID:62861d048e3ef704026012@ist.ac.at
DTSTART:20220525T110000
DTEND:20220525T120000
DESCRIPTION:Speaker: Katharine Jensen\nhosted by Carl Goodrich\nAbstract: E
 stablishing an adhesive contact between two materials requires both that t
 he surface energies favor the creation of interfacial area and that it is 
 possible to form contact area given the geometry and material properties. 
 While elasticity has long been understood to be important in determining t
 he relative stickiness between non-conformal surfaces\, in recent years ca
 pillarity has also emerged as playing key roles in adhesion with highly co
 mpliant materials in multiple ways. For example\, recent studies have demo
 nstrated that solid surface tension can compete with or dominate over bulk
  elasticity in governing contact mechanics on small length scales\, and mo
 unting evidence suggests that the internal free fluid phase of compliant p
 olymer gels also contributes significantly to mechanical response via both
  poroelasticity and classic capillary wetting. In this work\, we investiga
 te the adhesion between polydimethylsiloxane (PDMS) gel microspheres and r
 igid glass substrates. By varying the stiffness and size of the microspher
 es as well as the surface energy of the substrate and directly imaging the
  adhered microspheres\, we observe a range of adhesive contact geometries 
 from classic elastic to quantitatively wetting-like behavior\, always medi
 ated by a phase-separated fluid contact zone. We understand our data with 
 a theoretical model that incorporates elasticity\, capillarity\, and phase
  separation to capture the complete range of adhesive contact behavior.
LOCATION:Raiffeisen Lecture Hall\, Central Building\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Katharine Jensen: Elastocapillary Adhesion
URL:https://talks-calendar.ista.ac.at/events/3785
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