Figure 3

(a,b) XPS spectra for GSH-AuNCs and Zn-GSH-AuNCs within the range of Au 4f binding energy and (c) XPS spectrum for Zn-GSH-AuNCs within the range of Zn binding energy.

(a,b) XPS spectra for GSH-AuNCs and Zn-GSH-AuNCs within the range of Au 4f binding energy and (c) XPS spectrum for Zn-GSH-AuNCs within the range of Zn binding energy.