Levich Institute Seminar Announcement, 10/29/2013
Tuesday, 10/29/2013
2:00 PM
Steinman Hall, Room #312
(Chemical Engineering Conference Room)

Professor Zachary Gagnon
Johns Hopkins University
Department of Chemical and Biomolecular Engineering

"Electrokinetic Polarization at Microfluidic Liquid Interfaces: Application to Fluidic Routing and Biosensing "

ABSTRACT


To date, electrokinetic effects have been exploited to pump liquid (electro-osmosis) and manipulate particles, biomolecules and cells (dielectrophoresis) in microfluidic devices. Research and application in this area, however, has been primarily limited to polarizable solid/liquid interfaces. The influence of alternating current (AC) electrical fields at liquid/liquid interfaces remains relatively unexplored. As the majority of microfluidic applications involve aqueous liquid flows at low Reynolds number, liquid interfaces formed between co-flowing fluid streams are a natural occurrence in microfluidic systems. In this talk, I explore the influence of electrical fields at microfluidic-generated liquid/liquid electrical interfaces for biosensing and fluidic routing applications, and demonstrate how these interfacial microfluidic “force fields” can be used to produce a portable and robust microfludic platform.

BRIEF ACADEMIC/EMPLOYMENT HISTORY
  • Assistant Professor, Johns Hopkins University, Chemical and Biomolecular Engineering, 2011 - Present
  • Postdoctoral Fellow, Johns Hopkins University School of Medicine, 2009 - 2011
  • Ph.D, University of Notre Dame, Chemical and Biomolecular Engineering, 2009
  • B.S., University of Massachusetts, Amherst, Chemical Engineering, 2003


RECENT RESEARCH INTERESTS

Microfluidics, Electrokinetics, Biosensing



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