Fig. 2From: Nitrogen and sulfur-doped carbon quantum dots as fluorescent nanoprobes for spectrofluorimetric determination of olanzapine and diazepam in biological fluids and dosage forms: application to content uniformity testingA Fluorescence emission spectrum of NS@CQDs at 430 nm after excitation at 360 nm (Inset: photographs of N-CQDs under visible light and UV light), B the UV–Vis absorption spectra of (a) citric acid, (b) thiosemicarbazide, (c) NS@CQDsBack to article page