fig3

Figure 3. (A) XRD patterns of WS₂, WS₂@D-His/Ag, WS₂@L-His/Ag, WS₂@D,L-His/Ag, and WS₂@Ag. (B) Raman spectra of WS₂. (C) XPS survey spectrum and high-resolution XPS spectra of WS2@L-Ag High-resolution XPS spectra of WS₂@L-Ag (D) W 4f, (E) S 2p, and (F) Ag 3d.