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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3365
DTSTART:20140630T190000Z
DURATION:PT1H0M0S
DTSTAMP:20260305T113802Z
LAST-MODIFIED:20140627T130928Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Infrared Spectroscopy via Scanning Tunneling Microscope: Recen
 t Advances and Future Outlook\, R. G. Herb Condensed Matter Seminar\, 
 Ivan Pechenezhskiy\, University of California\, Berkeley
DESCRIPTION:Vibrational spectroscopy of molecules on surfaces provides
  valuable insights into their surface behavior\, including molecule-su
 rface and molecule-molecule interactions\, self-assembly\, as well as 
 chemical and structural properties. Traditionally this information is 
 obtained via infrared spectroscopic techniques that contain little or 
 no real-space information. Combining this type of optical vibrational 
 spectroscopy with atom-scale microscopy would be extremely useful for 
 better understanding microscopic phenomena. In this talk I will presen
 t a new technique whereby a scanning tunneling microscope can be used 
 to perform vibrational spectroscopy of molecular adsorbates at the sub
 monolayer coverage through the use of a tunable infrared laser source.
  Using this technique\, infrared absorption spectra of several diamond
 oid molecules deposited on a Au(111) surface were obtained. I will dis
 cuss the performance of the new technique and the physical insights th
 at were deduced from the measurements\, as well as the feasibility of 
 achieving single molecule resolution in the future.
URL:https://www.physics.wisc.edu/events/?id=3365
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