Abstract
We report the observation of enhanced Raman scattering from pyridine co-deposited with Ag on a Pt substrate. The spectrum was consistent with an electron-deficient Ag site onto which the pyridine was bonded. This held true for the Ag multilayer situation as well as for conditions under which the order of one monolayer of Ag was on the Pt. Since Pt alone is not able to support surface plasmon-polariton resonances this confirms earlier reports that the optical field enhancement mechanism can be removed thus leaving enhancement through the resonant Raman process in an adsorbed complex. Our results also show that the substrate has a secondary influence on the form of the resonant complex.
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