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. 2023 May 23;13(23):15540–15553. doi: 10.1039/d3ra00689a

Fig. 9. Storage stability of Hb@AuNCs. (A) UV-vis spectra of re-dispersed Hb@AuNCs after three subsequent cycles of purging with compressed air and nitrogen (N2) gas. The table shows the wavelengths of the main peaks after each cycle. (B) Fluorescence excitation (i) and emission (ii) spectra of freshly prepared and freeze-dried Hb@AuNCs. The emission spectra was obtained using an excitation wavelength (λex) of 494 nm. (iii) Fluorescence intensity (FI) readings of Hb@AuNCs after preparation and after being re-dispersed. Free Hb was set as a control. (C) Normalized Soret peak height over time of free Hb, Hb@AuNCs and re-dispersed Hb@AuNCs. The samples were incubated in a 0.09 mM hydrogen peroxide solution. The re-dispersed Hb@AuNCs had been stored as a powder for 14 days at 25 °C. Data represent mean ± SD (n = 3).

Fig. 9