Fig. 4From: Carbon Dots @ Platinum Porphyrin Composite as Theranostic Nanoagent for Efficient Photodynamic Cancer TherapyUV-Vis absorption (a) and fluorescence (b) spectra of CQDs, PtPor, and CQDs@PtPor. Fluorescence spectra (c) of CQDs with different excitation wavelengths. Fluorescence decays (d) of CQDs and CQDs@PtPor. The concentration of samples: CQDs (5 μg/mL), CQDs@PtPor (5 μg/mL, 3 μg/mL), and PtPor (3 μg/mL)Back to article page