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SUMMARY:Microfluidics: A tool to shape materials
DTSTART:20150323T131500
DTEND:20150323T141500
DTSTAMP:20260502T151851Z
UID:1dd626e63fb50a03158dcc20c1255e1257ce7f6336b80e969ebee89a
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Esther Amstad\, Soft Materials Laboratory\, EPFL\nMicrof
 luidics offers a unique control over the fluid flow and enables the format
 ion of highly monodisperse drops. These drops can be used as templates to 
 produce monodisperse particles with sizes spanning more than four orders o
 f magnitude. I will present a microfluidic spray drier\, a nebulizer\, tha
 t produces very small\, air-born drops that rapidly evaporate. These minus
 cule drops enable the production of amorphous nanoparticles made from almo
 st any material including those with a very high propensity to crystallize
 . By contrast\, much larger drops are often used as templates to produce p
 olymeric microparticles and microcapsules. I will present one example wher
 e I used double emulsion drops as templates to produce thermo- and photo-r
 esponsive polymersomes. However\, the limited throughput achieved with typ
 ical microfluidic drop makers restricts the application of microfluidics i
 n material science\; this is especially the case if particles are used as 
 building blocks of macroscopic materials. In the last part of my talk\, I 
 will present a highly parallelized microfluidic drop maker\, a centipede d
 evice\, that produces monodisperse emulsion drops with sizes ranging from 
 20 µm to 200 µm at a throughput more than 100 times higher than that of 
 a conventional microfluidic drop maker. This device thus has the potential
  to make microfluidic technologies useful for a much broader range of mate
 rial science applications.\nReference:\nAmstad\, E.\; Kim\, S.-H.\; Weitz\
 , D. A. Angewandte Chemie International Edition 2012\, 12499-12503\nUtada\
 , A. S.\; Chu\, L. Y.\; Fernandez-Nieves\, A.\; Link\, D. R.\; Holtze\, C.
 \; Weitz\, D. A. Mrs Bulletin 2007\, 32 (9)\, 702-708.\nDatta\, S. S.\; Ab
 baspourrad\, A.\; Amstad\, E.\; Fan\, J.\; Kim\, S.-H.\; Romanowsky\, M.\;
  Shum\, H. C.\; Sun\, B.\; Utada\, A. S.\; Windbergs\, M.\; Zhou\, S.\; We
 itz\, D. A. Advanced Materials 2014.\nBio: Esther Amstad studied material 
 science at ETH in Zurich where she also carried out her PhD thesis under t
 he supervision of Prof. Marcus Textor (2007-2010). Her thesis was devoted 
 to the steric stabilization of iron oxide nanoparticles. As a Postdoctoral
  fellow\, she joined the experimental soft condensed matter group of David
  A. Weitz at Harvard University (2011-2014). She developed new microfluidi
 c devices\, studied early stages of the crystallization of nanoparticles\,
  and assembled microcapsules for triggered release. Since June 2014\, she 
 heads the Soft Materials Laboratory (SMAL) at EPFL as a tenure tracked ass
 istant professor.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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