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Fig. 9 | Nanoscale Research Letters

Fig. 9

From: New Immunosensing-Fluorescence Detection of Tumor Marker Cytokeratin-19 Fragment (CYFRA 21-1) Via Carbon Quantum Dots/Zinc Oxide Nanocomposite

Fig. 9

Optimization of fluorescence determination of CYFRA 21-1 antigen at λex = 470 and λem = 520 nm. a Effect of added immobilized CQDs/ZnO-BM 19.21 nanocomposite, b effect of phosphate buffer saline of pH range 7.3–7.5, c effect of buffer concentration using PBS in the concentration range of 0.01–0.05 mol L−1, and d effect of immunoreaction time using 10–60 min

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