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Synthesis and Electromagnetic Wave Absorption Properties of Multi-Walled Carbon Nanotubes Decorated by BaTiO3 Nanoparticles

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Abstract:

A hybrid composite material, consisting of BaTiO3 and multi-walled carbon nanotubes, was synthesized by an efficient solvent-thermal route. Transmission electron microscopy images clearly indicate that the surfaces of the multi-walled carbon nanotubes were uniformly decorated by well-crystallized BaTiO3 particles, with diameters of 15–30 nm. Electromagnetic wave absorption properties analysis, determined by the electromagnetic parameters measured by a vector network analyzer, shows that the reflection loss in the BaTiO3/multi-walled carbon nanotube composite was higher than that occurring in pure multi-walled carbon nanotubes or BaTiO3 and that was resulted from a better matched characteristic impedance and an enhanced complex permeability in the high frequency, which was improved by the decrease of eddy currents owing to the finite increase in resistivity. The maximum reflection loss of −37.5 dB in the BaTiO3/multi-walled carbon nanotube composite was obtained at a frequency of 10.4 GHz and the absorption range under −10 dB was from 9.6–13.1 GHz range as the absorber thickness was 2 mm.

Keywords: BATIO3; CARBON NANOTUBES; ELECTROMAGNETIC WAVE ABSORPTION PROPERTIES; HYBRID COMPOSITES; NANO PARTICLES

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.3046

Publication date: February 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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