Fig. 3 shows the FTIR spectra of all the prepared samples (A1–A4) comprising of all the characteristic bands of PPy. The N–H stretching vibration band of PPy is observed at ~3434 cm-1 in the samples A1 and A4 which shifts towards lower wavenumbers side at ~3404 and 3412, in the sample A2 and A3, respectively [4,8,18,19]. In the sample A3, one more significant band is present at ~3126 cm-1, which may be attributed to O–H group. The doublet observed at ~2855 and ~2926 cm-1 in all the spectra is attributed to C-H stretching vibration mode of methyl and methylene group, respectively. Along with this doublet, one more band at ~2950-2958 cm-1 is observed in all the samples which can be ascribed to C-...
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