Wave number (cm−1) Assignment 2907 C-H stretch (strong) 2848 Five member ring C- H stretching 1558 N-H bending vibration of C = C and C–C in the pyrrole ring 1284 C-N stretching mode of vibration 1313 C-H in plane deformation of the Polypyrrole and N-H bending 1159 Aromatic C-H in plane bending vibration 1031 SO3− vibration 667 Fundamental vibration mode of SO4 770 C-H out of plane bending vibration

Table 1: Characteristic frequencies of DBSA doped PPy-SiC nanocomposites.