Fig. 1. Cyclic voltammetry curves of silver at different scan rates on glassy carbon electrode surface

Fig. 2. SEM images of Ag SERS substrate with different magnifications and EDS image of SERS substrate

Fig. 3. Raman spectra of R6G solution with two kinds of excitation light on different substrates surfaces

Fig. 4. Raman spectra of R6G solution with different excitation wavelengths on electrodeposited silver SERS substrates surfaces

Fig. 5. Raman spectra of R6G solution with various concentrations on electrodeposited silver SERS substrates surfaces

Fig. 6. SEM images of Ag SERS substrates with different roasting temperatures

Fig. 7. Raman spectra of R6G solution on SERS substrates surfaces with different roasting temperatures

Fig. 8. In-situ normal Raman spectra and in-situ SERS spectra of EMImCl at different temperatures