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Fig. 1 | Journal of Nanobiotechnology

Fig. 1

From: Fabrication of avidin-stabilized gold nanoclusters with dual emissions and their application in biosensing

Fig. 1

Characterization of Av–Au NCs. A Fluorescence spectra of Av–Au NCs (a, red lines) and avidin (b, grey line): dashed and solid lines represent the excitation and emission fluorescence spectra, respectively. Slit widths of excitation: 10 nm, slit widths of emission: 10 nm, and voltage: 700 V. Inset in part (A): photographs of the aqueous solutions of Av–Au NCs (a) and avidin (b) taken under 365 nm UV light. B Ultraviolet–visible absorption spectrum of Av–Au NCs (a, red lines) and avidin (b, grey line). C Fluorescence decay profiles of Av–Au NC solution at 449 nm (excitation at 374 nm). D Fluorescence decay profiles of Av–Au NCs solution at 651 nm (excitation at 374 nm). E High-resolution transmission electron microscopy image of the Av–Au NCs with 20 nm scale. F Size distribution histogram of Av–Au NCs

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