Fig. 1. Characterization of Hb@AuNCs. (A) Photographic image of free Hb (left) and Hb@AuNCs (right). (B) UV-vis absorption (Abs) spectrum of Hb@AuNCs. (C) Fluorescence intensity (FI) excitation (i) and emission (ii) spectra of Hb@AuNCs. The FI emission spectrum has been obtained using an excitation wavelength (λex) of 494 nm. (D) FI emission spectra of Hb@AuNCs excited at different wavelengths.
