ArticleAnalytical chemistry2025
The Role of Chloride in Raman Signal Enhancement by Electrochemical Silver Oxidation Revealed by Dark Field Microscopy.
Article in Analytical chemistry, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Raman spectroscopy is a widely used technique in several contexts, including chemical analysis, materials characterization, and catalysis. However, to exploit the high capacities of this technique, signal enhancement is needed. For this purpose, several methodologies can be used, and those known as surface enhanced Raman scattering (SERS), or resonance Raman (RR) have been widely used. However, there are some new strategies, such as electrochemical surface oxidation enhanced Raman scattering (EC-SOERS), that require further understanding for optimum exploitation in diverse analytical contexts. In EC-SOERS, the enhancement of the Raman signal is observed during the electrochemical oxidation of silver in the presence of a precipitating agent, but only for specific concentrations of this agent. In this work, we use electrochemical dark-field microscopy (DFM) to explore and reveal the origin of this concentration dependency by monitoring the oxidative formation of EC-SOERS substrates in solutions of different chloride concentrations. These
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