Extended Data Fig. 5: Standard SERS spectra.

(a) The standard SERS spectrum of 10⁻⁷ M crystal violet enhanced by Hya-Ag colloids (red) and the averaged spectrum of the null control (black). The signature window of crystal violet at 780 to 820 cm⁻¹ is indicated by the red stripe. (b) The standard SERS spectrum of 10⁻⁷ M Nile blue enhanced by Hya-Ag colloids. The signature window of Nile blue at 565 to 605 cm⁻¹ is indicated by the red stripe. For both panels, the noise window is at 1,700 to 1,740 cm⁻¹ as indicated by the gray stripes.

Source Data