This article presents, for the first time, a comparative analysis of the emission characteristics of large-area field-effect cathodes (LAFE) based on carbon nanotubes (CNTs) of various morphologies according to key parameters using a unique computerized technique. The work presents a description of a technology for creating various CNT arrays and their comprehensive structure characterization. All CNT arrays synthesized by the catalytic PECVD method on a silicon substrate showed a high degree of chemical purity under the presented technological conditions. In some cases, nanoisland films of Fe were used as a catalyst; in others, thin films of NiO were used, which were deposited on a silicon wafer by chemical vapor deposition (CVD) and atomic layer deposition (ALD), respectively. As a result of these studies, it turned out that an array with a thick CNT coating has good resistance to the action of strong electric fields, fairly good uniformity of distribution of emission centers, a fairly high selection current (2.88 mA/cm² at 4.53 V/μm), and compliance with the normal current mode according to the “orthodox” test, which makes the morphology of such structures the most promising for further technological optimization of CNT-based cathodes for various practical applications.

The temperature dependence of the electrical resistivity (ρ) and current-voltage characteristics of composite films based on multi-walled carbon nanotubes and a 95/5 wt % polymer have been...

The heat capacity and thermal diffusivity of a polymer composite based on multiwalled carbon nanotubes (95%), produced by electrospinning in the temperature range of 300 ≤ Т < 450 K, are investigated during heating and cooling. Temperature hystereses are detected characteristic of first-order phase transitions.

The Raman spectra and the temperature dependence of the electrical resistance of graphene oxide in the process of continuous heating and cooling in an argon atmosphere in the temperature...

Technologies for producing liquid-phase polymer composites of carbon nanofibers and their modifications are presented: carboxylated carbon nanotubes, polyaniline-modified nanotubes, supercondensate of multiwalled carbon nanotubes in epoxy phenol–formaldehyde resins. Polymeric composites with microwave absorption capabilities are considered.

Investigations concerning the heat capacity of high-carbon multi-wall nanotube-based polymer composite (95: 5%) are performed in the temperature range of 300 ≤ T < 450 K during heating and cooling. Anomalies in the heat capacity and the thermal diffusion responsible for structural first order phase transitions are found. A way of interpreting the obtained results is proposed.