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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-294@lptms.universite-paris-saclay.fr
DTSTART:20150112T110000Z
DTEND:20150112T120000Z
DTSTAMP:20150105T152904Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/physics-biology-i
 nterface-seminar-thomas-gibaud/
SUMMARY:Physics-Biology interface seminar: Thomas Gibaud - Moyen Amphi\, Bu
 ilding 510\, Université Paris-Saclay Orsay - 12 Jan 15 11:00
DESCRIPTION:Shape controlled filaments suspensions – rheology and dynamic
 s\nThomas Gibaud (ENS Lyon)\nThe mechanical behavior of a suspension of ri
 gid and semiflexible filaments has been studied in great detail. In compar
 ison the effect of the filament geometry has been relatively unexplored. H
 ere\, we hijack flagellar filaments from their original purpose in order t
 o develop a versatile model rod-like bio-colloid whose shape and length ca
 n be tuned. We present experimental results on the rheological behavior of
  suspensions of (1) straight\, (2) curly and (3) semi-straight/semi-curly 
 flagella with an identical average contour length. We find that (1) and (2
 ) show an elastic behavior at intermediate time but that (3) remains elast
 ic and does not flow at long times. Using fluorescence microscopy\, we tra
 ck individual filament and find that this elastic plateau is related to a 
 cage in which the filament is trapped for a certain among of time.  Taken 
 together\, this highlights the role of filament geometry in suspension mec
 hanics.
LOCATION:Moyen Amphi\, Building 510\, Université Paris-Saclay Orsay\, 15 R
 ue Georges Clemenceau\, orsay\, France
GEO:48.698187;2.181768
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  orsay\, France;X-APPLE-RADIUS=100;X-TITLE=Moyen Amphi\, Building 510\, Un
 iversité Paris-Saclay Orsay:geo:48.698187,2.181768
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