Droplets and microfluidic systems for nanomaterial synthesis
Event details
| Date | 19.11.2015 |
| Hour | 10:00 › 11:00 |
| Speaker | Prof. Yegân Erdem, Bilkent University, Ankara |
| Location | |
| Category | Conferences - Seminars |
Droplet-based microfluidic systems are promising for biological and chemical reactions as they provide rapid mixing times, precise concentrations and manipulation 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 on surfaces by creating energy gradients or they can be transported inside microchannels by using a carrier fluid. In the first part of this talk, the manipulation of liquid droplets on surfaces by using texture ratchets will be discussed. In this technique, droplets can be moved selectively based on their volume and viscosity. The second part of this talk will focus on using droplet-based microfluidics to synthesize nanoparticles. These microfluidic reactors – or microreactors – show promise for the synthesis of nanoparticles with well controlled size, size distribution and shape. Compared to batch-wise synthesis techniques, microfluidic technology can provide precise control of the reaction conditions such as temperature, residence time and mixing ratio of reagents.
Two different microreactors will be introduced. The first microreactor is made out of a polymer material and synthesizes magnetic iron-oxide nanoparticles by mixing two reagents at precise concentrations. The second microreactor is designed to produce monodisperse nanoparticles by utilizing thermally isolated heated and cooled regions for separating nucleation and growth processes. This reactor is made out of silicon and demonstrates the synthesis of TiO2 nanoparticles. At the end of this section, a method of assembling nanoparticles on a substrate will also be introduced.
The third part of this talk will focus on the future directions of this research. Functionalizing nanomaterials by using microfluidic systems and creating smart surfaces with these functionalized nanomaterials for biosensing and energy harvesting applications will be discussed.
Bio: Yegan Erdem received a B.Sc. in mechatronics engineering 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 received a Ph.D. from the Department of Mechanical Engineering at the University of California at Berkeley, in May 2013 with minors in materials science and electrical engineering. During her doctoral studies, she worked on the development of microfluidic systems for controlled synthesis of nanoparticles in Prof. Albert Pisano and Prof. Fiona Doyle's research laboratories.
Dr. Erdem joined Bilkent University in 2013 as an assistant professor in Mechanical Engineering Department. Her research interests include microfluidics, MEMS, nanomaterials, and nanosensors. She has published in journals such as IEEE MEMS, Advanced Materials, Small, Applied Physics Letters and Lab on a Chip. She was a recipient of the Jane Lewis and Berkeley Mechanical Engineering Fellowships. She also received Tubitak 2232 fellowship in 2014; Tubitak Early Career Grant and Tubitak 1003 priority grant in 2015.
Two different microreactors will be introduced. The first microreactor is made out of a polymer material and synthesizes magnetic iron-oxide nanoparticles by mixing two reagents at precise concentrations. The second microreactor is designed to produce monodisperse nanoparticles by utilizing thermally isolated heated and cooled regions for separating nucleation and growth processes. This reactor is made out of silicon and demonstrates the synthesis of TiO2 nanoparticles. At the end of this section, a method of assembling nanoparticles on a substrate will also be introduced.
The third part of this talk will focus on the future directions of this research. Functionalizing nanomaterials by using microfluidic systems and creating smart surfaces with these functionalized nanomaterials for biosensing and energy harvesting applications will be discussed.
Bio: Yegan Erdem received a B.Sc. in mechatronics engineering 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 received a Ph.D. from the Department of Mechanical Engineering at the University of California at Berkeley, in May 2013 with minors in materials science and electrical engineering. During her doctoral studies, she worked on the development of microfluidic systems for controlled synthesis of nanoparticles in Prof. Albert Pisano and Prof. Fiona Doyle's research laboratories.
Dr. Erdem joined Bilkent University in 2013 as an assistant professor in Mechanical Engineering Department. Her research interests include microfluidics, MEMS, nanomaterials, and nanosensors. She has published in journals such as IEEE MEMS, Advanced Materials, Small, Applied Physics Letters and Lab on a Chip. She was a recipient of the Jane Lewis and Berkeley Mechanical Engineering Fellowships. She also received Tubitak 2232 fellowship in 2014; Tubitak Early Career Grant and Tubitak 1003 priority grant in 2015.
Practical information
- Informed public
- Free
- This event is internal
Organizer
- The Institute of Microengineering (IMT)