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. 2018 Jul 11;3(7):7663–7672. doi: 10.1021/acsomega.8b00785

Figure 5.

Figure 5

Absorption (A) and emission (B) spectra of high-loading PMMA–PTE nanoparticles with PTE loading varied from (-⧫-) 5 wt %, (-▼-) 10 wt %, (-▲-) 17.5 wt %, and (-●-) 25 wt % (effective PTE concentration ranging from 33 to 165 μM in the final nanoprecipitated solution). All fluorescence measurements were measured with an excitation at 450 nm, path length of 1 cm, and concentration of 400 ppm. The fluorescence of diluted nanoparticle solutions (20 ppm) is shown in the Supporting Information (Figure S4). The arrows indicate the effects of increasing the concentration of the PTE dye.