Tip Enhanced Raman Spectroscopy (TERS) is a powerful analytical technique that combines the high spatial resolution of Scanning Probe Microscopy (SPM) with the chemical sensitivity of Raman Spectroscopy. In TERS, a metallic or metallized tip, typically made of gold or silver, is brought very close to the sample surface. The tip acts as an antenna, enhancing the local electromagnetic field and thus amplifying the Raman signal from the molecules near the tip. This allows for the acquisition of chemical information at the nanoscale.
