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TZID:Europe/Vienna
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DTSTART:20190331T030000
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TZOFFSETTO:+0200
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DTSTART:20191027T020000
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BEGIN:VEVENT
DTSTAMP:20260404T110031Z
UID:5c88f1db31582011466084@ist.ac.at
DTSTART:20190416T130000
DTEND:20190416T140000
DESCRIPTION:Speaker: Daniel Pearce\nhosted by Martin Loose\nAbstract: Activ
 e nematic liquid crystals are achieved experimentally by combining high co
 ncentrations of microtubules\, kinesin and ATP. These active nematic suspe
 nsions can then be localized to a 2D interface\, such as the surface of a 
 water droplet suspended in another medium. We will discuss the distributio
 n of topological defects within an active nematic liquid crystal confined 
 to the surface of a toroidal water droplet. Due to the topology of the sur
 face\, it is possible to coat a torus in a nematic material with no topolo
 gical defects. When the activity of the nematic is sufficiently high\, top
 ological defects will spontaneously form\, but they must preserve the net 
 topological charge of the system\, which is zero. Through experiment and s
 imulation we confirm that the local distribution of topological defects is
  proportional to the Gaussian curvature. As the activity of the system is 
 increased the reliance on the Gaussian curvature is diminished and the ava
 ilable area on different regions of the torus dictates the behavior.
LOCATION:Mondi Seminar Room 3\, Central Building\, ISTA
ORGANIZER:rsix@ist.ac.at
SUMMARY:Daniel Pearce: Controlling active matter with curvature and topolog
 y
URL:https://talks-calendar.ista.ac.at/events/1864
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