Keywords
charge carrier hopping mechanism.
cross-linked carbon nanotubes
electron paramagnetic resonance
electronic structure
spark plasma sintering
transmission electron microscopy
X-ray photoelectron spectroscopy
Abstract
Covalently cross-linked carbon nanotube network has been synthesized using spark plasma sintering followed by nitric acid treatment. EPR investigation of its electronic structure in comparison with pristine carbon nanotubes has revealed that the covalent cross-linking leads to a decrease in the number of paramagnetic centers, while the oxidation results in an increase in their number. The oxidation affects the cross-linked and pristine materials in a different manner
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