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SUMMARY:Ultrafast charge transfer in pyridine on Cu(110) - Heike Arnolds\,
  Surface Science Research Centre\, University of Liverpool
DTSTART:20110512T150000Z
DTEND:20110512T160000Z
UID:TALK29898@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:The nature of the molecule-surface interaction determines the 
 properties of molecular electronic devices and ideally we want to control 
 this interaction. Here we initiate ultrafast charge transfer in pyridine o
 n Cu(110)\, with femtosecond 532 nm pump pulses and probe the molecule-sur
 face interaction with IR-visible sum frequency generation (SFG).  We detec
 t a response on two very different timescales - within a few 100 fs after 
 the pump pulse\, we detect ultrafast charge transfer from the surface to a
  pyridine π* orbital\, leading to a tilted\, metastable species with a li
 fetime of tens of picoseconds\, which has potential to be used as a switch
  in molecular electronics.  
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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