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VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260831T065503Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20080321T173000Z
DTEND:20080321T183000Z
UID:event256@bu.edu
URL:http://physics.bu.edu/internal/events/show/256
SUMMARY:Controlling Complex Molecules with Light
DESCRIPTION:Featuring Adam E. Cohen\, Harvard University\nHosted by: Mikkel
	 Jensen\n\nPart of the Biophysics/Condensed Matter Seminar Series.\n\nAbstr
	act: To study a single molecule\, one would like to hold the molecule still
	\, without perturbing its internal dynamics.  I will present a machine that
	 achieves this goal.  The Anti-Brownian Electrokinetic trap (ABEL trap)\, t
	racks the Brownian motion of a single molecule using fluorescence microscop
	y\, and applies electrical kicks to the molecule that are timed to induce a
	n electrokinetic drift that cancels the Brownian motion.  The ABEL trap can
	 immobilize single biomolecules for extended observation and has been used 
	to study the dynamics of individual DNA molecules and protein chaperonins. 
	 I will give examples of new things that can be learned from trapped molecu
	les.\n\nIn a second example\, I will discuss using light to control an inte
	rnal degree of freedom: molecular chirality.  Electromagnetic fields may be
	 engineered to excite molecules of a single handedness in a mixture contain
	ing equal numbers of left- and right-handed molecules.  This observation pr
	ovides a new route to using light to impart a chiral bias to a photochemica
	l reaction.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
END:VEVENT
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