BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:A stochastic model for bacteria-driven micro-swimmers - Christian 
 Esparza Lopez (University of Cambridge)
DTSTART:20180419T120000Z
DTEND:20180419T130000Z
UID:TALK103870@talks.cam.ac.uk
CONTACT:Anne Herrmann
DESCRIPTION:In recent years\, experiments have shown the feasibility of ut
 ilising bacteria as micro-scale robotic devices. There has been special at
 tention paid to the development of bacteria-driven microswimmers\, as it i
 s possible to take advantage of the built-in actuation and sensor mechanis
 ms in the cells. Several studies have proposed stochastic models to descri
 be the diffusive behaviour of microscopic particles propelled by surface-a
 ttached bacteria\, but no theoretical framework has been proposed to predi
 ct their motility characteristics. Here I present a stochastic fluid dynam
 ic model for microscopic particles driven by E. coli bacteria attached to 
 their surface. Assuming low Reynolds number flow\, a large number of attac
 hed bacteria N and negligible thermal noise compared to the random activit
 y of each cell\, I compute analytical expressions for the rotational diffu
 sion coefficient and the mean squared displacement (MSD)\, in the ballisti
 c and diffusive regimes. Next I discuss the effects of external chemical g
 radients and the possibility of artificial chemotaxis.\n
LOCATION:MR11\, Centre for Mathematical Sciences\, Wilberforce Road\, Camb
 ridge
END:VEVENT
END:VCALENDAR