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. 2019 Dec 17;24(24):4629. doi: 10.3390/molecules24244629

Figure 2.

Figure 2

FTIR spectra of (a) toluene washed NPFe (solid line) in comparison with NH4Cl (dashed line), (b) ethanol washed NPFe (dotted line) and oleic acid treated NPFe (solid line).