SERS experiments were performed on different smooth surfaces of metals and
non-metallic materials. A satisfactory SERS-activation of these surfaces wa
s obtained by deposition of silver colloidal nanoparticles after adsorption
of 2,2'-bipyridine adopted as organic ligand. The morphology of the SERS-a
ctive surfaces has been investigated by scanning electron microscopy. (C) 2
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