Fig. 4From: Thiolation and characterization of regenerated Bombyx mori silk fibroin films with reduced glutathioneXPS survey spectrum of Ag-loaded silk fibroin film (a). High-resolution XPS spectrum of the Ag 3d region measured from an Ag-loaded silk fibroin film (b). Raw data are represented with a solid black line, and individual Voigt-fit components are represented with solid colored linesBack to article page