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Fig. 3 | Cancer Nanotechnology

Fig. 3

From: Quantum dots as targeted doxorubicin drug delivery nanosystems in human lung cancer cells

Fig. 3

Fluorescence quenching of QDs by FA in 0.02 M phosphate-buffered saline of pH 7.4 (n = 5). Insets: Stern–Volmer plots of QD quenching fluorescence as a function of FA concentrations. Experimental conditions: CQD = 1 mg·mL−1; CFA = 0.025, 0.05, 0.25, 0.5, 1.5, 2, 3, 4, and 5 µM; λex. = 350 nm; PMT voltage: 700 V; PMT integration time: 20 ms; scan speed: 600 nm·min−1. QD Ag–In–Zn–S nanocrystals modified with: 11-mercaptoundecanoic acid (MUA), Cys L-cysteine, LA lipoic acid, FA folic acid

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