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SUMMARY:Fabrication\, assembly and propulsion of artificial microswimmers 
 and nanorobotic systems - Prof. Peer Fischer\, Max Plank Institute for Int
 elligent Systems
DTSTART:20190208T160000Z
DTEND:20190208T170000Z
UID:TALK111130@talks.cam.ac.uk
CONTACT:Lorenzo Di Michele
DESCRIPTION:Dynamic assembly\, self-organization and motion is a common ph
 enomenon in living systems. Artificial systems that mimic this behavior ar
 e currently a research area of intense activity. The goal is to realize sy
 stems that can move and exhibit the complex self-organization found in nat
 ural systems. Symmetry-breaking appears to be a pre-requisite for achievin
 g many interesting functions including locomotion\, but is in general diff
 icult to realize with most colloidal and molecular systems. I will discuss
  how one can nevertheless obtain motion in molecular and chemically-active
  colloidal systems. A fabrication process is described that permits us to 
 obtain large numbers of designer micro- and nanostructures with defined sh
 ape and material composition. These enable a number of applications\, incl
 uding as nanopropellers that can penetrate biological tissue\, and as self
 -propelled autonomous chemical nanomotors. Whether enzymes can also self-p
 ropel is currently being debated and I will discuss recent diffusion measu
 rements that address this question. Finally\, it is shown that a recent ad
 vance in the generation of complex ultrasound fields promises “one shot
 ” assembly of soft-matter into arbitrary shapes. 
LOCATION:Ryle Seminar Room\, Cavendish Laboratory
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