Surface
Enhanced Resonance Raman Spectroscopy
When the excitation energy, which is in resonance with the electronic
transition of the molecule adsorbed on the nanostructured Ag, Au, or Cu
surface, corresponds to the energy of the surface plasmons of the
metal, coupling of the radiation field with the plasmon energy gives
origin to the SERR effect. The intensity of the Raman scattering
increases up to six orders of magnitude for the adsorbed molecules: RR
+ SER → SERR
SERR of the molecules immobilized on coated metal electrodes
allows studying of potential-dependent processes of the adsorbed
species. In the SERR studies of metalloproteins the electrodes can
serve as electron sources for driving the catalytic cycle of enzyme,
while SERRS provides simultaneous insight into the active site.
