Combined Electrostatic-Covalent Building of Au NPs Multilayers and Their Size-Enhanced Cohesive and SERS Properties

Table 2

Assignment of the main peaks of the SERS spectra of methylene blue adsorbed on NPs multilayer structure.

Cm^−1	Assignments
1623	C–C and C–N–C
1438	C–C
1398	C–C
	C–N–C
1190	COO–