MULTIWALLED CARBON NANOTUBES AND NANOFIBERS: SIMILARITIES AND DIFFERENCES FROM STRUCTURAL, ELECTRONIC AND CHEMICAL CONCEPTS; CHEMICAL MODIFICATION FOR NEW MATERIALS DESIGN

Present work points out the differences between possible tubular carbon structures: nanotubes and nanofibers, as well as describes ways of their modification for utilization for new materials design. For material characterization, XRD, XPS, Raman spectroscopy, thermal analysis, HRTEM and SEM, pore size distribution, EELS, elemental analysis and adiabatic bomb calorimetry were used. Heats of formation for nanotubes and nanofibers and their dependence on carboxylation extent as well as properties of the modified materials are also discussed. The perspectives of applications of modified carbon nanotubes in catalysis and polymers chemistry are given.