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DTSTAMP:20260406T042021Z
UID:61691ed053c8d382278700@ist.ac.at
DTSTART:20220602T110000
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DESCRIPTION:Speaker: Eric Dufresne\nhosted by Scott Waitukaitis\nAbstract: 
 Living organisms build optical and mechanical metamaterials.  These intri
 cate nano- and micro-structures rival the best we can manufacture in a cle
 an room\, yet they are constructed from naturally abundant resources with 
 sustainable low-energy processes.   Made from a wide variety of organic a
 nd inorganic components\, these materials can be found across nature\, fro
 m single-celled organisms to vertebrates.   In recent decades\, basic res
 earch has revealed many of the structure-property relationships governing 
 their function\, and inspired a wealth of synthetic structures that mimic 
 them.  However\, an essential question remains:  how do living systems p
 recisely control the structure of materials at the nano- and micro-scales?
 In this talk\, I’ll introduce some fascinating structures found in algae
  and birds.  Although the former are made of silica\, and the latter of p
 rotein\, both structures are thought to share a common physical origin: ph
 ase separation.  Phase separation is a generic process where a mixture is
  destabilized and its components spontaneously create multiple domains wit
 h different chemical compositions or physical structures.  While nano- an
 d micro-architectures naturally emerge during any classical phase separati
 on process\, interfacial energy destabilizes them\, driving coarsening as 
 the system approaches thermodynamic equilibrium.  I will describe our rec
 ent experiments showing how elastic forces that emerge during phase separa
 tion can prevent coarsening and control the size\, shape\, and stability o
 f micro- and nano-domains.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Eric Dufresne: Putting the Squeeze on Phase Separation
URL:https://talks-calendar.ista.ac.at/events/3768
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