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Chemistry

How Surface-Enhanced Raman Spectroscopy Amplifies Signal for Trace Detection

Quick fact

Surface-enhanced Raman spectroscopy (SERS) can amplify the Raman signal by factors up to 10^14 to 10^15, enough to detect a single molecule. The secret lies in metallic nanoparticles, typically gold or silver, which dramatically boost the local electromagnetic field due to plasmonic effects.

Why this is interesting

Have you ever tried to see something extremely faint, like a firefly in a stadium? Regular Raman spectroscopy gives a signal that is about one photon out of every ten million—so weak it's almost useless for trace detection. So how do scientists turn that faint glimmer into a blazing beacon?

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How Surface-Enhanced Raman Spectroscopy Amplifies Signal for Trace Detection

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