Chemical – Electronic Coupling and the InAs Two-Dimensional Electron Gas (2DEG): Highly Sensitive and Selective Sensing of Surface- Based Biomolecule Interactions
April S. BrownJohn Cocke Professor of Electrical and Computer Engineering
Friday, March 14, 2014|
2:00pm - 3:00pm
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About the Event
The origin of surface donors yielding the InAs surface-potential confined
two-dimensional electron gas (2DEG) remains unknown, but is believed to be defect-based
and therefore related to surface reconstruction, strain, and/or native defects associated with
surface processes such as oxidation. We show that the surface oxide (either engineered or
“native”) can be used as a reagent in surface-based chemical interactions modifying surface
molecular attachment, both conformation and coverage, in a concentration-dependent fashion.
These molecular interactions can be, in turn, “sensed” through changes in the 2DEG density and
Dr. April S. Brown is the John Cocke
Professor of Electrical and Computer Engineering at
Duke University. She received her Ph.D. degree from
Cornell University in 1985. She worked at the Hughes
Research Laboratories (now HRL LLC) in Malibu, Ca.
from 1986-1993, and spent one year at the Army
Research Office in the Physics Division (1988). She was
at the Georgia Institute of Technology (1994-2002) as
the Pettit Professor in Microelectronics where she also
served as Associate Dean in the College of Engineering
and as Executive Assistant to the President. She joined
Duke University as Professor and Chair in July 2002.
She is currently Sr. Associate Dean for Research in
the Pratt School of Engineering. Professor Brown’s
research has focused on epitaxial growth of InP - and
GaN-based semiconductors, material characterization
and microelectronic devices.
Contact: Lisa Vogel
Open to: Public