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SUMMARY:Photopatternable superparamagnetic nanocomposite for the fabricati
 on of microstructures
DTSTART:20111122T110000
DTSTAMP:20260510T202332Z
UID:c7894781c8b72b0a06493b9207bea7e6bef187e3c8e9863f4e688d88
CATEGORIES:Conferences - Seminars
DESCRIPTION:Marcel Suter\, ETHZ\nThis talk will present a magnetic polymer
  composite\, the fabrication of microstructures and their use in microsyst
 em applications. Magnetic polymer composites (MPCs) combine the magnetic c
 haracteristics of a filler material and the properties of a polymer matrix
 \, enabling low cost fabrication processes. A photodefinable magnetic poly
 mer composite is obtained by dispersing superparamagnetic magnetite nanopa
 rticles (diameters of 11.4 ± 3.4 nm\, count average diameter by TEM) in a
  photosensitive epoxy\, SU-8. The composite is used to fabricate magnetic 
 microstructures such as microcantilevers and microrobots (e.g. artificial 
 bacteria flagellas) which can be actuated by magnetic fields. MPCs with up
  to a 4 vol.% particle concentration can be structured by using convention
 al photolithography techniques or laser writing techniques based on two-ph
 oton polymerization (TPP). Minimal line widths of 314 nm are obtained with
  a 2 vol.% MPC using the TPP technique. The composite exhibits superparama
 gnetic properties and can be remotely heated by alternating magnetic field
 s at high frequencies due to the incorporated nanoparticles. MPCs are prom
 ising candidates to advance research in the field of micromanipulation\, d
 rug delivery\, and self-assembly.
LOCATION:MXC315
STATUS:CONFIRMED
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