Найдено научных статей и публикаций: 1, для научной тематики: PANI-CSA
1.
Savchenko D., Kassiba A.., Ogurtsov N., Errien N., Makoswka-Janusik M., Pud A., Kodjikian S., Oueriagli A.
- IEEE Conference Proceeding: ICTON Mediterranean Winter Conference (Angers, France, December 10-12), 2009. ICTON-MW 2009. 3rd , 2010
Electron paramagnetic resonance (EPR) investigations were carried out on hybrid Core-Shell nanomaterials
associating silicon carbide nanoparticles and conducting polyaniline. The performed experiments compare the
paramagnetic centres, the electronic transport features and the interface effects in ...
Electron paramagnetic resonance (EPR) investigations were carried out on hybrid Core-Shell nanomaterials
associating silicon carbide nanoparticles and conducting polyaniline. The performed experiments compare the
paramagnetic centres, the electronic transport features and the interface effects in two classes of materials, bare
polymers and core-shell nanocomposites. By EPR, large doping rates were demonstrated in the bare doped
polymers through important saturation phenomena which alter significantly the EPR spectrum features.
Furthermore, memory effects were involved in the bare doped polymer with regard to the EPR spectrum features
depending on the conditions of its thermal treatments. In the hybrid core-shell nanocomposites nor such
saturation and nor memory effects were found on the EPR signals even if similar paramagnetic centres exist in
both classes of samples. These behaviors were discussed taking into account the thermal stability and the doping
efficiency in the considered classes of materials. Optimal doping levels were then realized and their effects on
the polymers and the nanocomposites were clarified by using EPR and DRS (dielectric relaxation spectroscopy)
measurements. Also, it is demonstrated that the charge carriers consist in polarons in the nanocomposites while
bipolarons contributions dominate the electrical conductivity in the bare doped polymers