Аннотация:Electronic structure of covalently cross-linked carbon nanotubes network (CL-CNTs) affected by spark plasma sintering followed by nitric acid treatment, was studied for the first time by electron paramagnetic resonance and compared with that for pristine CNTs. It has been found that cross-linking decreases the number of paramagnetic centers (NCP), while the oxidation increases the NCP. Oxidation affects differently the cross-linked and pristine materials.