Carbon nanotubes grown by catalytic CO2 laser-induced chemical vapor deposition on core-shell Fe/C composite nanoparticles

Carbon nanostructures from Fe–C nanocomposites by activated CVD methods

“…Two types of Fe-C nanoparticles, labelled CF15 NP and CF32 NP, were synthesized by laser pyrolysis of Fe(CO) 5 , C 2 H 4 and C 2 H 2 mixtures, using a three nozzle set-up (see details in [18]). The main parame-ters of the catalyst synthesis are presented in Table 1.…”

“…These nanocomposites were previously employed to grow nanotubes /nanofibers by laserassisted CVD [17,18] or by vacuum annealing [19]. Starting from these nanoparticles, different carbon nanostructures were grown, depending on the utilization of hot filaments alone or in combination with glow discharge plasma by using similar temperature, pressure and reactive gas flows conditions.…”

Infrared Lasers in Nanoscale Science

“…Mainly depending on the ethylene concentration, nanotube mean diameters between 10 and 60 nm were found. By increasing ethylene precursor flow rate, not only larger mean diameters of the CNTs were found but also the distribution of the CNT diameters became broader [28] .…”

“…Using an open-air pyrolitic LCVD system in which the role of gas-phase reactions are minimized, the growth of highly oriented and aligned single-and multiwall carbon nanotubes have been reported [28] . The LCVD technique in general has several prominent advantages including high deposition rates that are favorable for scale-up production of CNTs.…”

“…For a better control of CNT growth conditions, it proved to be advantageous to carry out separately the catalyst deposition and carbon nanotube growth. Thus, as a main advantage, C-LCVD allows ex-situ prepared metal-based particles with the desired properties and dispersion degree to provide the nucleation conditions for the growth of CNTs [28] . The temperature is measured with a thermocouple positioned behind the substrate.…”