Tip-enhanced Raman spectroscopy (TERS)

Tip-enhanced Raman spectroscopy (TERS) is an advanced analytical technique that combines a sharp, nanoscale tip with laser light to study materials at extremely small scales. When the laser illuminates the tip-sample junction, the local electromagnetic field intensifies, amplifying the Raman signal emitted by molecules near the tip. This enhancement allows scientists to obtain detailed chemical and structural information with resolution down to a few nanometers—far beyond traditional Raman spectroscopy. TERS is valuable in fields like nanotechnology, materials science, and biology for analyzing tiny samples or specific features with high precision.