Study of surface defects and crystallinity of MWCNTs growth in FCCVD
Source abstract
Abstract
Abstract This research investigated the structural growth of multiwalled carbon nanotubes (MWCNTs) in a double stage horizontal chemical vapor deposition (CVD) reactor. Ethylene was used as a carbon source for nucleation of nanotubes. Ferrocene catalyst weight was varied from 0.1 to 0.2 g to demonstrate the growth of MWCNTs on Si/SiO 2 /Al 2 O 3 substrate. The obtained data revealed that the weight of the catalyst significantly affects the diameter, crystallinity, alignment and yield of the nanotubes. Lower inner-shell spacing and the ratio of D-Raman peak intensity and G-Raman peak intensity (I D /I G ratio) were obtained with 0.15 g of ferrocene, which was an indication of relatively pure carbon nanotubes (CNTs) growth. Raman spectra also confirmed the highly crystalline and relatively pure CNTs structures with I D /I G ratio of 0.700. TGA data revealed the formation of 97% pure nanotubes with oxidation temperature of 620°C. However, above and below the optimum (0.15 g of ferrocene), some of the grown CNTs were found defective and few black spots were also seen in TEM micrographs.
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Research context
OpenAlex topics: Carbon Nanotubes in Composites · Graphene research and applications · Nanotechnology research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Center of Innovative Nanostructures and Nanodevices , Universiti Teknologi PETRONAS , 32610 Bandar Seri Iskandar, Perak , Malaysia
Department of Fundamental and Applied Sciences , Universiti Teknologi PETRONAS , 32610 Bandar Seri Iskandar, Perak , Malaysia
Department of Mechanical Engineering , Universiti Teknologi PETRONAS , 32610 Bandar Seri Iskandar, Perak , Malaysia
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