Fig. 1
A TEM image, B–E elemental mapping images, and F, G HRTEM images of Au@Cu2-xSe NPs. H Size distribution of Au@Cu2-xSe NPs counted from A. I XRD pattern of Au@Cu2-xSe NPs. J Cu 2p XPS spectrum of Au@Cu2-xSe NPs. K FTIR spectra of Au@Cu2-xSe NPs and pure PVP. L Hydrodynamic size of Au@Cu2-xSe NPs dispersed in water (100 µg mL−1)