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DTSTAMP:20260409T134657Z
UID:1695978000@ist.ac.at
DTSTART:20230929T110000
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DESCRIPTION:Speaker: Michael Engel\nhosted by Carl Goodrich\nAbstract: The 
 spontaneous organization of building blocks is extensively used in nature 
 and found at all length scales\, from crystallization processes\, via comp
 osite (nano)materials\, to living cells. Understanding the relationship be
 tween building blocks\, formation pathways and the resulting structure is 
 of fundamental importance as well as for controlling materials properties.
  Colloidal crystallization is a particularly useful model because it can b
 e controlled and characterized with high resolution and high precision. Si
 gnificant thermal fluctuations must be present to assemble well\, which me
 ans entropy plays a central role.This presentation investigates the divers
 ity of entropic effects in colloidal systems. Our tools are computer simul
 ations and advanced statistical sampling to efficiently explore phase spac
 e. We start with the hard sphere model system\, which goes back to the ear
 liest computer simulations but still has open questions and many relations
 hips to real materials. In particular\, we investigate icosahedral local o
 rder in size-disperse mixtures as found in alloys\, the appearance of magi
 c numbers under the effect of confinement as found in atomic clusters\, an
 d complex crystallization processes involving multi-step formation pathway
 s as found in biomineralization. Our results lead to a new interpretation 
 of entropy and help tame entropy in colloid and nanoparticle experiments.
LOCATION:Moonstone Bldg / Ground floor / Seminar Room F\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Michael Engel: Taming Entropy in Colloidal Crystallization
URL:https://talks-calendar.ista.ac.at/events/4396
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