Gold and silver nanoparticles have been electrodeposited onto fluorine-doped tin oxide by a two pulse method. The
statistical distribution of the size and interparticle spacing of nanoparticles can be controlled by altering the
overpotential and duration of the nucleation and growth pulses. Isolated gold and silver nanoparticle covered surfaces
prepared in this way display a localized surface plasmon absorption. Raman spectra for immobilized trans-1,2-bis(4-
pyridyl) ethylene have been recorded from isolated gold and silver nanoparticle surfaces with different mean particle
size, and at different excitation wavelengths. The optimal SERS conditions determined for isolated gold and for silver
nanoparticles produce enhancement factors of 5.6 x 102 and 4.0 x 103 , respectively. Reproducibility is typically 20-
30% RSD due to variations in the SERS active area exposed in different measurements and perhaps variations in the
enhancement factor at different sites on a single electrodeposited surface.
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