Principles and Methods of SERS

It is now well accepted that an enhancement of the electromagnetic field represents a dominant contribution towards the SERS effect [32-34], Such an enhancement derives 

Recalling Equation (7.1), which describes the Raman intensity contributed from free molecules, the SERS intensity can expressed in general terms by  

As the surface-plasmon-enhanced electromagnetic field is the dominant contribution to most cases of SERS, in the next section attention will be focused on the electromagnetic mechanism of SERS. 

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