Levich Institute Seminar Announcement, 10/29/2013
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 "
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
RECENT RESEARCH INTERESTS
Microfluidics, Electrokinetics, Biosensing