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SUMMARY:Droplets and microfluidic systems for nanomaterial synthesis
DTSTART:20151119T100000
DTEND:20151119T110000
DTSTAMP:20260508T120242Z
UID:cddf3cfd62469a5ae73dd3c1196c9f3c2ebe166622a499e045f15517
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Yegân Erdem\, Bilkent University\, Ankara\nDroplet-base
 d microfluidic systems are promising for biological and chemical reactions
  as they provide rapid mixing times\, precise concentrations and manipulat
 ion of samples as individual packages. These systems have several lab on a
  chip applications such as analysis of biological samples and synthesis of
  nanomaterials for sensor technology. Droplets can be either manipulated o
 n surfaces by creating energy gradients or they can be transported inside 
 microchannels by using a carrier fluid. In the first part of this talk\, t
 he manipulation of liquid droplets on surfaces by using texture ratchets w
 ill be discussed. In this technique\, droplets can be moved selectively ba
 sed on their volume and viscosity. The second part of this talk will focus
  on using droplet-based microfluidics to synthesize nanoparticles. These m
 icrofluidic reactors – or microreactors – show promise for the synthes
 is of nanoparticles with well controlled size\, size distribution and shap
 e. Compared to batch-wise synthesis techniques\, microfluidic technology c
 an provide precise control of the reaction conditions such as temperature\
 , residence time and mixing ratio of reagents.\nTwo different microreactor
 s will be introduced. The first microreactor is made out of a polymer mate
 rial and synthesizes magnetic iron-oxide nanoparticles by mixing two reage
 nts at precise concentrations. The second microreactor is designed to prod
 uce monodisperse nanoparticles by utilizing thermally isolated heated and 
 cooled regions for separating nucleation and growth processes. This reacto
 r is made out of silicon and demonstrates the synthesis of TiO2 nanopartic
 les. At the end of this section\, a method of assembling nanoparticles on 
 a substrate will also be introduced.\nThe third part of this talk will foc
 us on the future directions of this research. Functionalizing nanomaterial
 s by using microfluidic systems and creating smart surfaces with these fun
 ctionalized nanomaterials for biosensing and energy harvesting application
 s will be discussed.\nBio: Yegan Erdem received a B.Sc. in mechatronics en
 gineering from Sabanci University in 2006. In 2008\, she obtained an M.S. 
 degree in mechanical engineering from University of Washington\, where she
  worked in Karl Bohringer's research group on developing textured surfaces
  for droplet transport and characterization of a walking microrobot. She r
 eceived a Ph.D. from the Department of Mechanical Engineering at the Unive
 rsity of California at Berkeley\, in May 2013 with minors in materials sci
 ence and electrical engineering. During her doctoral studies\, she worked 
 on the development of microfluidic systems for controlled synthesis of nan
 oparticles in Prof. Albert Pisano and Prof. Fiona Doyle's research laborat
 ories.\nDr. Erdem joined Bilkent University in 2013 as an assistant profes
 sor in Mechanical Engineering Department. Her research interests include m
 icrofluidics\, MEMS\, nanomaterials\, and nanosensors. She has published i
 n journals such as IEEE MEMS\, Advanced Materials\, Small\, Applied Physic
 s Letters and Lab on a Chip. She was a recipient of the Jane Lewis and Ber
 keley Mechanical Engineering Fellowships. She also received Tubitak 2232 f
 ellowship in 2014\; Tubitak Early Career Grant and Tubitak 1003 priority g
 rant in 2015.
LOCATION:CM010 http://plan.epfl.ch/?lang=en&room=CM010
STATUS:CONFIRMED
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