Tip-enhanced Raman Spectroscopy Recent Developments and Future Prospects

Tip-enhanced Raman Spectroscopy -Recent Developments and Future Prospects 

Using standard Raman spectroscopy for surface studies leads to rather tedious experiments because of its generally very low sensitivity. In contrast, SERS often provides high sensitivity due to a giant enhancement. The first paper on SERS pubhshed by the Van Duyne group reported a million-fold enhanced Raman intensity for pyridine molecules adsorbed on a silver electrode compared with the Raman intensity for unbound pyridine molecules [21]. Hence, SERS makes it possible to detect submonolayer quantities of adsorbates. 

The aim of this book chapter is to review developments leading to the new and very promising approach of tip-enhanced Raman spectroscopy, which have taken place in recent years. The chapter is organized as follows. After the general introduction (10.1), Section 10.2 sketches the attempts at Raman spectros- 

An Outlook is given in Section 10.5, sketching first of all the most recent TERS experiments and then possible developments in a number of directions. 

All these observations support the importance of steps, i.e. of roughness, for the enhancement Recently, the Tian group pubhshed a series of papers describ- 

---

J78 I 10 Tip-enhanced Raman Spectroscopy - Recent Developments and Future Prospects... 

---