Morphological and Structural Analysis of Polyaniline and Poly(o-anisidine) Layers Generated in a DC Glow Discharge Plasma by Using an Oblique Angle Electrode Deposition Configuration

Abstract

This work is focused on the structural and morphological investigations of polyaniline and poly(o-anisidine) polymers generated in a direct current glow discharge plasma, in the vapors of the monomers, without a buffer gas, using an oblique angle-positioned substrate configuration. By atomic force microscopy and scanning electron microscopy we identified the formation of worm-like interlinked structures on the surface of the polyaniline layers, the layers being compact in the bulk. The poly(o-anisidine) layers are flat with no kind of structures on their surfaces. By Fourier transform infrared spectroscopy we identified the main IR bands characteristic of polyaniline and poly(o-anisidine), confirming that the polyaniline chemical structure is in the emeraldine form. The IR band from 1070 cm −1 was attributed to the emeraldine salt form of polyaniline as an indication of its doping with H + . The appearance of the IR band at 1155 cm −1 also indicates the conducting protonated of polyaniline. The X-ray diffraction revealed the formation of crystalline domains embedded in an amorphous matrix within the polyaniline layers. The interchain separation length of 3.59 Å is also an indicator of the conductive character of the polymers. The X-ray diffraction pattern of poly(o-anisidine) highlights the semi-crystalline nature of the layers. The electrical conductivities of polyaniline and poly(o-anisidine) layers and their dependence with temperature are also investigated.

Green synthesis of conductive polyaniline by Trametes versicolor laccase using a DNA template

“…Both products exhibited typical FTIR bands of emeraldine form (Table 1) [18,20] even if some differences between the two polymers were found, as already observed by Junker and co-workers [9]. Interestingly, the 1070 cm −1 IR band characteristic of emeraldine salt form of PANI was present in both polymers (protonated NH + ), while only pDANI showed the presence of the 1405 cm −1 band, related to C-N + [40]. Moreover, pDANI displayed bands attributed to para substitutions in benzene ring whilst meta substitutions were present in PANI.…”

Radar Absorption Performance of Fe3O4/AC/PANI Nanocomposites Prepared from Natural Iron Sand

“…As shown in Figure 5 (a), the morphology of the nanocomposites consists of 3 particle shapes namely spheres, chunks, and worm-like structures. Sequentially, these shapes describe the Fe3O4 nanoparticles, AC [31,32], and PANI [33]. Qualitatively, it is observed that the sphere of Fe3O4 tends to agglomerate.…”

Promoting the effect of zinc‐rich epoxy via poly(aniline‐co‐anisidine)/iron waste composite on corrosion protection of steel

“…Figure presents the FTIR spectra of the copolymer, IWP, and COIW. The FTIR spectrum of the copolymer (Figure A) shows the characteristic bands of the poly(aniline‐ co ‐anisidine) . The N─H and C═N stretching vibrations appeared at 3403 and 1622 cm −1 , respectively.…”

“…Figure 1A) shows the characteristic bands of the poly(aniline-coanisidine). [25][26][27] The N─H and C═N stretching vibrations appeared at 3403 and 1622 cm −1 , respectively. C═C stretching bands for the quinonoid rings observed at 1564 cm −1 and those for benzenoid groups emerged at 1506 and 1457 cm −1 .…”