The influence of solvent, polymer concentration and molecular weight on the SERS activity of CV was measured based on the maximum intensity of the peak corresponding to the C-C ring stretching mode (1620 cm although there are no significant differences in maximum SERS intensity within a printed assembly, the SERS intensity distribution is more homogeneous in the patterns printed with PVP360K than with PVP10K (Figure ). Interestingly, the areas near the center of the pattern which are only sparsely-filled with AuNRs have similar SERS intensity as the outer rim (Figure ). No significant differences were observed by