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DTSTAMP:20260921T231451Z
LAST-MODIFIED:20170515T132109Z
DTSTART:20170518T150000Z
DTEND:20170518T160000Z
UID:event1769@bu.edu
URL:http://physics.bu.edu/internal/events/show/1769
SUMMARY:Defect dynamics of the 2D confined active nematic liquid crystals
DESCRIPTION:Featuring Achini Opathalage\, Dogic Lab\, Brandeis University\n
	\nPart of the Biophysics Seminars.\n\nBoundaries modify active matter in wa
	ys that have no counterpart in equilibrium materials. Presently there is no
	 universal theory in active matter to account for boundaries\, making it es
	sential to proceed experimentally with a well-controlled system. In this ta
	lk I will talk about the role of boundary conditions on a simplified experi
	mental model of biological active matter system composed of extensile filam
	entous bundles of microtubules driven by clusters of kinesin motors. These 
	bundles form a dense quasi-2D active nematic liquid crystals when sediment 
	onto a surfactant-stabilized oil-water interface. When this system is furth
	er confined onto different boundary conditions\, imposing total topological
	 charge\, unique dynamical behavior can be observed under high circular con
	finement\, in the order of hundred micrometers. The experimental results il
	lustrate how this system can serve as a platform for testing theoretical mo
	dels of non-equilibrium statistical mechanics and potentially aid in unders
	tanding self-organization processes in living biological systems.
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STATUS:CONFIRMED
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