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. 2016 Mar 24;6:23557. doi: 10.1038/srep23557

Figure 4. PL spectra of ZnO nanoparticles synthesized by the hydrolysis of ZnEt2 with different concentrations of PAAH (bottom curve: 0 wt% of PAAH; lower middle curve: 0.063 wt% of PAAH; higher middle curve: 0.63 wt% PAAH and top curve: 6.3 wt% of PAAH).

Figure 4

The plots are shifted along the y-axis for clarity.