Fig. 2
Physical characterizations and RONS scavenging activity of Cu NDs. a TEM image of Cu NDs. Scale bars = 50 μm. b Hydrodynamic diameter distribution of Cu NDs. c XRD pattern of Cu NDs. d FTIR spectra of Cu NDs. e UV-vis spectra of Cu NDs. f H2O2 scavenging activity of Cu NDs at various concentrations. g NO· scavenging activity of Cu NDs at various concentrations. h ·O2- scavenging activity of Cu NDs at various concentrations. i ·PTIO scavenging activity of Cu NDs at various concentrations. j NO· scavenging activity of Cu NDs at various concentrations. k ABTS·+ scavenging activity of Cu NDs at various concentrations. The inset is ABTS·+ test solution treated with various concentrations of Cu NDs. l ·DPPH scavenging activity of Cu NDs at various concentrations. The inset is ·DPPH solution treated with various concentrations of Cu NDs. In f–l, data represent means ± SD from three independent replicates