Table 1.

For the excitation wavelength of 633 nm and four Raman peaks (RS) studied here, ${\lambda }_{Raman}$ associated to RS, the intensities $I_{Raman}$ and $I_{SERS}$, RSDs associated to $I_{SERS}$ values, analytical enhancement factors (AEF) and EF values (in arbitrary unit) obtained with the $E^4$ model are presented.

Name	RS (cm${}^{-1}$)	${\lambda }_{Raman}$ (nm)	$I_{Raman}$	$I_{SRRS}$	RSD (%)	AEF	EF (a.u.)
1	1000	676	16	271	6.6	1.7 × 10${}^7$	0.220
2	1025	677	11	209	4.8	1.9 × 10${}^7$	0.222
3	1075	679	20	409	4.4	2.1 × 10${}^7$	0.224
4	1575	703	14	334	3.6	2.4 × 10${}^7$	0.238