Fig. 3

(a) XPS full spectrum of Cu-Cy, Cu-Cy-PEG and Cu-Cy-PEG@AgNPs; XPS spectrum peaks of (b) C 1s, (c) N 1s, (d) Cu 2p, (e) S 2p and (f) Ag 3d of the Cu-Cy-PEG@AgNPs.

(a) XPS full spectrum of Cu-Cy, Cu-Cy-PEG and Cu-Cy-PEG@AgNPs; XPS spectrum peaks of (b) C 1s, (c) N 1s, (d) Cu 2p, (e) S 2p and (f) Ag 3d of the Cu-Cy-PEG@AgNPs.