[HTROCSC-Ann.] FW: Special Seminar on Thursday July 8, 2010

Chao-Min Cheng ccheng at gmwgroup.harvard.edu
Tue Jul 6 16:40:44 EDT 2010

FYI...a talk at Wyss Institute...if you are interested in microfluidics, please stop by. All the best,
Post-doc. working with GMW

From: Nisbet, Jeanne Marie [mailto:jeanne.nisbet at wyss.harvard.edu] 
Sent: Tuesday, July 06, 2010 4:08 PM
To: Kelley, Susan L.; A.vandenBerg at ewi.utwente.nl; Bayoumi, Ahmed Samir; Ali Khademhosseini; Brock, Amy Monique Lepre; Anna Laromaine; Borna Dabiri; Yung, Chong W. (forwarding); Huh, Dongeun; Demirel, Melik; Gee, Elaine Pei-San (forwarding); Erin M. Anderson @gmail; Hamilton, Geraldine A; Kim, Hyun Jung; Kang, Joo Hun; Domansky, Karel; Kyung-Jin Jang; Mira Guo; Korin, Netanel; Ratmir Derda; Ryan Cooper; Won Jae Choi; Torisawa, Yusuke; Zhihong Nie; Super, Mike; Chu, Zen; Didier, Jon; Sean Sheehy; Tony Bahinski; Dan Leslie; Kevin Kit Parker; George M. Whitesides
Cc: Ingber, Donald Elliott; Nisbet, Jeanne Marie; Tolikas, Mary; Antoniou, P. Ayis
Subject: Re: Special Seminar on Thursday July 8, 2010 
Importance: High


Hello everyone,

There will be a special seminar on Thursday, July 8, 1 - 2 PM in CLSB room 521.  Dr. Sun Min Kim (CV attached) from the Department of Mechanical Engineering at Inha University in South Korea will give a talk about his work on microfluidic systems for biochemical analysis.  Below is an abstract of his talk.  

In this seminar two components of microfluidic systems for biochemical analysis will be presented. Firstly, active and passive micromixer devices for protein sample pretreatment will be introduced.  A simply fabricated microfluidic device that has a micro/nanochannel interface enhances the active electrokinetic mixing of two fluid streams and a new passive micromixer which uses flow variation by microchannel geometry was also investigated by experimental and numerical studies.  Secondly, two novel protein preconcentration devices will be introduced. Sample preconcentration is a critical operation required for the determination of trace amounts of analytes of interest for which the concentration in the original solution is lower than the detection limits of the instrumentation.  In this research, two novel techniques, embodied in microdevices, were created. A simple PDMS device was fabricated by weak bonding between PDMS and glass substrate. Upon application of electric fields, sample concentration is enhanced 103~106 - fold in 30 minutes. Another simple PDMS device using Temperature-Gradient Focusing (TGF) will be described. High electric potential applied to the device induced a temperature gradient within the microfluidic channel due to the channel's variable-width, and analytes were focused at a specific location as a result of temperature-dependent species mobility.  These microfluidic devices can be a component of integrated Lab-on-a-chip systems for biochemical analysis.  At the end, the current researches in our group will be briefly introduced. 


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