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3:30 p.m.
in Room 307 of the Optical Sciences Meinel Building
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Speaker: |
Ming Wu
University of California at Berkeley |
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Title: |
Optoelectronic Tweezers for Manipulating Cells and Nanowires |
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Host: |
Stanley Pau |
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Abstract: |
Optoelectronic tweezers (OET) is a new optical
manipulation technique developed recently at UC Berkeley. Based
on light-induced dielectrophoresis, OET can trap and sort
colloidal particles and biological cells. It requires 100,000
times less optical power than conventional laser tweezers. As a
result, we can use digital light projects to form massively
parallel dynamic traps. As many as 31,000 individually
addressable traps have been generated over an area of ~ 1 mm x 1
mm. Recently, we have succeeded in trapping semiconductor and
metallic nanowires (~ 100 nm diameter, a few micron in length).
Once trapped, we can use the same optical beam to excite and
measure the Raman spectra of the trapped single nanowire.
Potentially, we can also use trapped nanowire as a SERS probe
for in situ Raman characterization. Dynamic manipulation and
sorting of biological cells using phototransistor-based OET will
also be discussed.
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Bio: |
Ming Wu is Professor of Electrical Engineering
and Computer Sciences at the University of California, Berkeley,
and Co-Director of Berkeley Sensors and Actuators Center (BSAC).
His research interests include MEMS, optoelectronics, and
optofluidics. He received his M.S. and Ph.D. in Electrical
Engineering from UC Berkeley in 1985 and 1988, respectively.
Before joining the faculty of UC Berkeley, Dr. Wu was a Member
of Technical Staff at AT&T Bell Laboratories, Murray Hill, from
1988 to 1992, and Professor of Electrical Engineering at UCLA
from 1993 to 2004. In 1997, Dr. Wu co-founded OMM in San Diego,
CA, to commercialize MEMS optical switches. He is an IEEE
Fellow, a Packard Fellow (1992-7). He was recently awarded the
2007 Engineering Excellence Award from the Optical Society of
America. He has published over 440 technical papers, and holds
16 patents. |
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