Fig. 2

Atomic structural characterization of BSA-Cu SAN. a Cu K-edge XANES spectra and d Fourier-transform EXAFS spectra of BSA-Cu SAN, Cu foil, CuO, and Cu2O. c, d The corresponding EXAFS fitting of BSA-Cu SAN at c K space and d R space. e–h Wavelet transformation of Cu K-edge EXAFS of e BSA-Cu SAN, f Cu foil, g CuO, and h Cu2O. i O 1s XPS spectra of BSA-Cu SAN