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Hybrid polyaniline–TiO2 nanocomposite Langmuir–Blodgett thin films: Self-assembly and their characterization



Polyaniline (PANi)–titanium dioxide (TiO2) nanocomposite materials were prepared by chemical polymerization of aniline doped with TiO2 nanoparticles. Surface pressure–area (π-A) isotherms of these nanocomposites show phase transformations in the monolayer during compression process. Multiple isotherms indicate that the monolayer of the nanocomposite material can retain its configuration during compression-expansion cycles. Langmuir–Blodgett thin films of PANi–TiO2 nanocomposite were deposited on the quartz and indium tin oxide coated conducting glass substrates. Fourier transfer infrared spectroscopy and UV–visible spectroscopy study indicates the presence of TiO2 in PANi, whereas X-ray Diffraction study confirmed the anatase phase of TiO2 and particle size (∼nm) of PANi–TiO2. The morphology of Langmuir–Blodgett films of these nanocomposites was also characterized by atomic force microscopy. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41386.

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