“…2c, PPy doped with CS showed the characteristic peaks located at 1538 cm −1 and 1289 cm −1 , which were ascribed to the C\N and C_C vibrations of the Py ring [11,32], respectively. And the peaks at 1085 cm − 1 , 668 cm − 1 and 965 cm −1 , emerged on the spectrum, were attributed to the in-plane vibrations of C\H [33,34]. According to the XPS and FTIR results, it could be concluded that Py monomers were successfully polymerized into PPy.…”