Rhodiun as a Ubiquitous Substrate for Surface Enhanced Raman Spectroscopy

摘要

Rman Spectroscopy is a powerful technique in characterizing the molecular structur at the molecular level. However, only after the idsocvery of surface enhanced Raman scattering (SERS) effect, has it become one of the most widely used techniqeu in surface sciences. The limitation that only Ag, Au and Cu can produce prominent SERS isganl of practical significane, greatly hinders the application of this techniqeu. Recently our group has made great progress in extending SERS to pure transition metal surfaces, such as Pt,Ni, Fe, Co etc ~(1). Rh, due ot its special application as catatlysts in the aatalytci or electrochemcial reaction has made it one most important materials in surface sciences. It will be great helop for understanding the interfacial phenomenon and possibly the SERS mechanisms if we can extend SERS to the Rh surface. However, It has been found that, Rh is very difficult to be roughened since it will grow naturally in air an ozide layer which will reard the further formation of sruface oxides. Furthermore, Rh is ~(2). How to select a method to roughen the surface and to extend SERS to Rh seems not an easy task.