Abstract
Surface-enhanced Raman scattering (SERS) is a powerful technique based on the intensification of the Raman signal because of the interaction of a molecule with a nanostructured metal surface. Electrochemically roughened silver has been widely used as SERS substrate in the qualitative detection of analytes at the ultratrace level. The combination of time-resolved Raman spectroelectrochemistry with silver screen-printed electrodes is proposed as methodology for the preparation of SERS substrates. The in situ activation process is used to obtain a suitable SERS signal for tris(bipyridine)ruthenium(II) quantification. The detection of this analyte at concentrations of a few tens of nM is possible with a low integration time (2s) and good precision. The main objective of this chapter is that students become familiar with Raman spectroelectrochemical techniques. They can know the SERS effect and compare it with the electrochemical SERS effect. Assessment questions for students and indications for writing a lab report are also included.
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