Figure 3 | Scientific Reports

Figure 3

From: NIR multiphoton ablation of cancer cells, fluorescence quenching and cellular uptake of dansyl-glutathione-coated gold nanoparticles

Figure 3

Aqueous suspensions of a-G-AuNPs and a-DG-AuNPs (700 μg/mL) under UV (a,b) and visible light (c) irradiation. Emission spectra of a-G-AuNPs (d) and a-DG-AuNPs (e) at variable wavelengths of excitation. Emission spectra with excitation at 287 nm (f) of l-tryptophan (1.5 × 10–5 mol/L) in absence and in presence of a-G-AuNPs or a-DG-AuNPs (125 µg/mL). * λex; # Diffraction at 2λex due to diffraction from the grating of the spectrometer monochromator.

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