What is the SERS Mechanism

The points to be considered when analyzing the various theoretical models in the light of the available experimental evidence are the following  

Can the theoretical model explain apparent enhancements 10 and as high as 10 This evaluation should have been done after considering the approximations in the models and the effect the removal of these approximations may have on the calculated enhancement. 

Is the surface morphology required by the model shown to be unquestionably present in the experimental setups Can the model explain the dependence on the metal substrate  

Can the model explain the electric potential dependence How does the predicted excitation profile agree with the experimental one  

Regarding the distance dependence, how does theory compare with experiment  

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