Title

Enhanced negative magnetoresistance with high sensitivity of polyaniline interfaced with nanotitania

Document Type

Article

Publication Date

1-1-2016

Abstract

Unique negative giant magnetoresistance (GMR) of up to -43% at room temperature was observed in the 10 wt% titania/polyaniline (TiO2/PANI) nanocomposites prepared by simple oxidation polymerization. And the negative MR value was further evaluated using forward interference model. Other properties were tested and comparatively reported. The resistivity of TiO2/PANI nanocomposites decreased with increasing temperature, indicating a semiconductor behavior. The Mott variable range hopping (VRH) approach indicated that TiO2/PANI nanocomposites are disordered systems in the 3-dimensional VRH regime. The scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) were also used to study morphology, chemical and crystal structure of the nanocomposites. The thermogravimetric analysis (TGA) was used to study the thermal stability of the TiO2/PANI nanocomposites.

Publication Source (Journal or Book title)

Journal of the Electrochemical Society

First Page

H664

Last Page

H671

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