Horizontally networked carbon nanotubes grown on Au–Fe catalyst nanoparticles
Source abstract
Abstract
Horizontally networked carbon nanotubes grown on Au–Fe catalyst nanoparticles were achieved through the decomposition of acetylene by plasma-enhanced chemical vapor deposition (PECVD) method. It has been ascertained that conditions governing the formation of the bilayer Au–Fe catalyst nanoparticles dictate the resultant growth of the nanotubes. From the FESEM and AFM studies, the average nanoparticle size was found to increase in the range of 13.3–87.0 nm as the catalyst film thickness increases. A net-like structure of multi-walled carbon nanotubes network with the remains of Au clusters on the substrate was observed for the thicker catalyst, suggesting the absence of nanotube growth on these Au clusters due to catalyst deactivation. Possible mechanisms of nanotube growth dependent catalyst formation are discussed in the paper, which explain the role of Au film in the growth stage. The influence of ammonia to acetylene gas ratios on the sheet resistance, sheet concentration, average sheet Hall coefficient, and magnetoresistance of the grown nanotubes was discussed.
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Research context
OpenAlex topics: Carbon Nanotubes in Composites · Graphene research and applications · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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