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BEGIN:VEVENT
DTSTAMP:20261020T213830Z
LAST-MODIFIED:20160119T164620Z
DTSTART:20160128T150000Z
DTEND:20160128T160000Z
UID:event1537@bu.edu
URL:http://physics.bu.edu/internal/events/show/1537
SUMMARY:Pushing the Limits of Nanofabrication:  Using Micromachines to Asse
	mble Nanostructures
DESCRIPTION:Featuring Han Han\n\nPart of the Departmental Seminars.\n\nDiss
	ertation Committee:  David Bishop\, Shyam Erramilli\, Steve Ahlen\, Pankaj 
	Mehta\n\nAbstract:\n\nIn this talk I will discuss the concept of a "Fab on 
	a Chip" where we construct a palette of MEMS-based micron scale tools to cr
	eate nanoscale structures.  We've built lithography tools\, novel atomic de
	position sources\, atomic mass sensors\, thermometers\, heaters\, shutters 
	and interconnect technologies that allow us to precisely fabricate nanoscal
	e devices and structures using these micron scale devices.  I will showcase
	 the power of the technique by discussing a series of experiments on quench
	 condensed superconducting Pb films where we are able to gently place atoms
	 upon a surface\, creating a uniform\, disordered amorphous film and precis
	ely tune the superconducting properties.  Conventional deposition technique
	s produce films where the metal "balls up" and superconductivity occurs bec
	ause of Josephson tunneling between the metallic regions.  Because our tech
	nique places atoms on the surface in a tunable manner with very little subs
	trate heating\, the atoms appear to stay put where they land upon the subst
	rate and we can obtain a very different film morphology with much smaller g
	rain size than conventional method.  I will discuss how this new set of tec
	hniques for nanofabrication will open up an unexplored regime for the study
	 of the physics of devices and structures with small numbers of atoms.\n\n!
	[Han](/resources/event-image/1537/03f0702_small)
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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