Novel surface vibrational spectroscopy: infrared-infrared-visible sum-frequency generation.
A novel type of surface vibrational sum-frequency generation spectroscopy is presented that enables a highly specific measurement of the coupling of molecules on surfaces. With this doubly vibrationally resonant technique, two-dimensional vibrational spectroscopy of molecules on surfaces becomes possible. The technique is demonstrated for the C-O stretch vibration of CO on a ruthenium (001) surface. It allows for the determination of the intermolecular coupling strength of dipole-coupled CO molecules on the surface.
Bonn
M
M
Leiden Institute of Chemistry, P.O. Box 9502, 2300 RA Leiden, The Netherlands. m.bonn@chem.leidenuniv.nl
Hess
C
C
Miners
J H
JH
Heinz
T F
TF
Bakker
H J
HJ
Cho
M
M