Vasiliev O. Thermodynamic properties of multiwalled carbon nanotubes and nanocrystalline diamond

Dissertation studies thermodynamic properties of multiwalled carbon nanotubes and nanocrystalline diamonds and their relationship with the corresponding values for graphite and diamond. For the first time by a comprehensive and systematic study reliable values of thermodynamic properties of multiwalled carbon nanotubes and nanocrystalline diamond have been obtained by measuring their heat capacity by adiabatic calorimetry in the temperature range 60-300 K. The peculiarities of the thermodynamic properties of these nanostructures over graphite and diamond have been shown and analised in terms of impact of aerogenic impurities, specific surface area and type of the structure of substance. On an example of carbon nanoforms it has been shown that, from a thermodynamic point of view, the transition of a substance to the nanostate is structurally sensitive.