Abstract
Substrates for surface enhanced Raman scattering (SERS) are mainly produced by electrochemical roughening of noble metal electrodes, sputtering of noble metals on glass slides or preparation of colloids. In this work SERS of pyridine and nicotinic acid on a newly developed SERS substrate was obtained using an FT-Raman spectrometer with excitation in the near-IR employing a Nd:YAG laser at 1064 nm. This new technology is based on the electrochemical deposition of silver on surface roughened non-ferrous metals and alloys. Although this new preparation method needs only few quantities of noble metals and no expensive equipment, excellent SERS signals being approximately 700 000 times (nicotinic acid) up to 1.4 million times (pyridine) stronger than those of conventional Raman measurements could be observed. Finally, the dependency of the signal enhancement on the chloride concentration was investigated for pyridine.
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