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Figure 3 | Nanoscale Research Letters

Figure 3

From: Folic-acid-conjugated pullulan/poly(DL-lactide-co-glycolide) graft copolymer nanoparticles for folate-receptor-mediated drug delivery

Figure 3

Fluorence excitation and plots of intensity ratios. Fluorescence excitation of pyrene (6.0 × 10 − 7 M) vs. the concentration of PuLG (a), FAPuLG-1 (b), and FAPuLG-2 (c) nanoparticles in distilled water (λem = 390 nm). Plots of the intensity ratios, I338/I335, from the pyrene excitation spectra vs. log c of the PuLG (d), FAPuLG-1 (e), and FAPuLG-2 (f) nanoparticles in distilled water. Each point was derived from the fluorescence spectra curve. The arrows indicate the signal changes in the crossover region.

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