Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
91 (1989), S. 2683-2688
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
A combination of second harmonic generation (SHG) and a simple dipole–dipole interaction model is presented as a new technique for determining adsorbate geometries on surfaces. The polarization dependence of SHG is used to define possible geometries of the adsorbate about the surface normal. General formulas for absorption band shifts using the geometry constraints imposed by the SHG data are derived for a dimer constructed from two arbitrarily placed monomers on the surface using the dipole–dipole interaction potential. These formulas can be used to determine the orientation of the two monomers relative to each other. A simplified version of this formalism is used to interpret absorption band shifts for a system of rhodamine B adsorbed on quartz.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.456978
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