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SERS Substrate: Advancing Precision in Molecular Detection
Surface-Enhanced Raman Scattering (SERS) substrates have emerged as essential tools in modern analytical science, enabling ultra-sensitive detection of molecules at extremely low concentrations. A SERS substrate typically consists of metallic nanostructures—most commonly silver or gold—engineered to amplify Raman signals when molecules interact with the surface. This amplification allows researchers to capture detailed molecular fingerprints that were previously difficult or impossible to observe with conventional Raman spectroscopy. The technology has become especially valuable in applications requiring high sensitivity, such as trace chemical analysis, biomedical diagnostics, environmental monitoring, and food safety testing.
A well-designed SERS substrate enhances electromagnetic fields at “hot spots,” the nanoscale regions where the local electric field is intensified. When a target molecule is positioned near these hot spots, its Raman signal can be increased by several orders of magnitude. This phenomenon enables detection down to single-molecule levels in some cases. Today,…
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