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. 2019 May 23;9(5):792. doi: 10.3390/nano9050792

Figure 2.

Figure 2

Fourier Transform Infrared spectroscopy (FTIR) spectra of (a) CuO nanoparticles (CuO NPs) pristine and treated with Arg and Val; (b) free Cys, Cu-Cys complex and CuO NPs treated with Cys; (c) free Glu, Cu-Glu complex and CuO NPs treated with Glu (d) free Asp, Cu-Asp complex and CuO NPs treated with Asp; (e) free Leu, Cu-Leu complex and CuO NPs treated with Leu; (f) Cu-Phe complex, CuO NPs treated with Phe, Cu-Tyr complex and CuO NPs treated with Tyr.