Synthesis and Optical Properties of Iodinated Multi-walled Carbon Nanotubes

CVD Conditions for MWCNTs Production and Their Effects on the Optical and Electrical Properties of PPy/MWCNTs, PANI/MWCNTs Nanocomposites by In Situ Electropolymerization

“…Meanwhile, the I G’ /I G ratio also confirms that the structural defects are higher in the as-obtained sample (0.55) in comparison with commercial CNTs (0.21). The I D /I G ratio has been widely used to evaluate the structure’s order; thus, a value near zero is desirable [ 89 ]. The I D /I G and I G’ /I G ratios were obtained using the maximum heights of the D, G, and G’ bands after subtracting a baseline.…”

“…On the other hand, the FT-IR spectrum of pure PANI displays the following bands: NH stretching vibration of secondary amine overlapped with the free and hydrogen bonded NH at 3440 cm −1 , C-H bending of benzenoid ring at 2890 cm −1 , C=C vibrations of quinoid units, quinoid ring-stretching at 1500 cm −1 , bending of CH in CH 2 at 1452 cm −1 , N-H bending mode at 1400 cm −1 , CN stretching in benzene and quinoid rings at 1305 cm −1 , CH bending at 1250 cm −1 and 1000 cm −1 , C-H in-the-plane at 1130 cm −1 , electronic transition of electrons in PANI structure at 1100 cm −1 , C-H in-plane bending at 1000 cm −1 , and the CH deformation of 1,4-disubstituted ring/Q ring at 826 cm −1 [89,[100][101][102][103]. The spectra of electrodeposited PANI/MWCNTs showed an increase in the intensity in the bands of the functional groups that they have in common; one example is the overlap of OH in carboxylic groups adhered to the surface of CNTs as well as the NH stretching in the CN bands.…”