Abstract
The article presents the results of experiments on the synthesis of carbon nanofibers by thermal chemical vapor deposition using copper nanopowders obtained by electric explosion of wire as catalysts. Stable growth of carbon nanofibers was carried out at temperatures significantly lower than normally used. The process parameters that are optimal for low-temperature growth of carbon nanofibers have been identified during the performed experiments. The synthesized samples have different diameters and morphology (from spiral to direct). Copper clusters are both at the ends and inside the fibers. The results of IR spectroscopy indicate that the structure of the obtained carbon nanofibers is polymeric. X-ray analysis revealed the presence of a halo on the diffraction patterns at small values of the angle 2θ, which proves that the grown<br />structures have an amorphous nature. There are no groups that are responsible for long-range order in all Raman spectra. Studies by transmission electron microscopy showed that nanostructures do not have an internal channel and nanofibers are solid.
Highlights
IntroductionCarbon nanotubes (CNTs) have been targets of numerous experimental and theoretical studies
Since their discovery, carbon nanotubes (CNTs) have been targets of numerous experimental and theoretical studies
The experiments were performed at different temperatures (200‒700 °C) and pressures (100‒400 mbar) to determine the optimal conditions for low temperature synthesis of carbon nanostructures (CNs)
Summary
Carbon nanotubes (CNTs) have been targets of numerous experimental and theoretical studies. The purposes of these experiments were study on the conditions of obtaining and analysis of their unique mechanical, chemical and electrical properties. The existence of carbon nanotubes was reported earlier by Soviet scientists L.V. Radushkevich and V.M. Lukyanovich in 1952 [2]. Over the past two decades such methods as various types of chemical vapor deposition CVD (in RF and microwave discharge, DC plasma, as well as the method of hot filament), the synthesis in flames of hydrocarbons and arc discharge have been developed for producing carbon nanotubes [1, 3,4,5]. Despite the fact that these methods achieved a high level of quality, they are still
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