This work is devoted to the CVD-synthesis of arrays of carbon nanotubes (CNTs) on Co-Zr-N-(O), Ni-Nb-N-(O), Co- Ta-N-(O) catalytic alloy films from gas mixture of C2H2+NH3+Ar at a substrate temperature of about 550°C.Heating of the amorphous alloy causes its crystallization and squeezing of the catalytic metal onto the surface. As a result, small catalyst particles are formed on the surface. The CNT growth takes place after wards on these particles. It should be noted that the growth of CNT arrays on these alloys is insensitive to the thickness of alloy film, which makes this approach technically attractive. In particular, the possibility of local CNT growth at the ends of the Co-Ta-N-(O) film and three-level CNT growth at the end of more complex structure SiO2/Ni-Nb-N-O/SiO2/Ni-Nb-N-O/SiO2/Ni-Nb-N-O/SiO2 is demonstrated.
In the present work we investigated silver and gold cluster array formation on non-heated thin film substrate of amorphous carbon by means vacuum-thermal evaporation of small quantity of material. In basic experiments two series of samples with a different thickness (1-20 nm) were prepared from weight portion 0.6-11 mg, the distance between evaporator and deposition surface was 20 cm. The investigation of the samples of both series by TEM showed the significant dependence of the particle size and the density of their location on the surface on the quantity of condensing Ag and Au or on the virtual film thickness. The interesting results obtained in the work formed the basis of the model which expands understanding condensation processes, nucleation and growth of the crystalline phase from the gas phase.
In this paper we study the process of plasma enhanced chemical vapor deposition (PECVD) of carbon nanostructures in the form of a film, the pillars, the flakes at a temperature of 100-350 °C from the vapor-gas mixture H2+CO+Ar. Also in the paper presents the structural features of the carbon nanopillars obtained at 250 °C. Determined mechanical stresses occurring during the growth of carbon nanostructures. Investigated the features of the growth of carbon pillars and proposed a phenomenological description of the process of their formation during PECVD process.