Fig. 3From: New Immunosensing-Fluorescence Detection of Tumor Marker Cytokeratin-19 Fragment (CYFRA 21-1) Via Carbon Quantum Dots/Zinc Oxide NanocompositeSpectroscopic spectra of CQDs (a) UV-Vis spectrum at 224 and 280 nm and (b) fluorescence spectrum of CQDs at λex = 360 and λem = 452 nmBack to article page