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Polyaniline and polyaniline-neodymium oxide composites were synthesized by in-situ polymerization method using ammonium persulfate as an oxidizing agent. Composites were made by mixing polyaniline and neodymium oxide in different weight% (10, 20, 30, 40 and 50). The structural and morphological changes in the composite were investigated by Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM). FTIR spectrum showed the formation of the composite with well agreed characteristic peaks. FESEM images of the composite revealed the branch-like granular morphology of the composite. The dielectric behavior of the composite is measured in the frequency range from 50 to 5 M Hz. Variation of dielectric constant of the composites with the applied frequency is attributed to the Maxwell-Wagner polarization and Koops phenomenological model. [ABSTRACT FROM AUTHOR]

Polypyrrole and polypyrrole/tungsten disulfide composites (10, 20, 30, 40 and 50wt%) were synthesized by chemical polymerization method using ammonium persulfate as an oxidizing agent. The composites were characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR) so as to study the structural and morphological changes in the composite. FESEM images of the composite reveals the granular morphology and FTIR spectrum shows the formation of the composite. AC frequency dependent dielectric studies were obtained by using Hioki model 3532-50, programmable computer interfaced digital LCR meter with a frequency range of 50 to 5 M Hz. Variation of dielectric constant of the polypyrrole composites with the applied frequency is attributed to Maxwell-Wagner polarization model. [ABSTRACT FROM AUTHOR]

Here in this article, we report Li-intercalated titanium disulfide (TiS2) two-dimensional (2D) nanosheets, exfoliated in 1-methyl-2-pyrrolidinone (NMP) forming a quite stable dispersions of pale brownish color. As synthesized TiS2 nanosheets were characterized by transmission electron microscopy (TEM). Selected area electron diffraction (SAED) pattern confirmed the hexagonal lattice structure of the exfoliated nanosheets. [ABSTRACT FROM AUTHOR]