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- Title
FERROCENE WEIGHT OPTIMIZATION FOR CVD GROWTH OF CARBON NANOTUBES OVER Si/SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub>.
- Authors
KHAN, Y.; SHUKRULLAH, S.; NAZ, M. Y.; GHAFFAR, A.; AHMAD, I.; ALSUHAIBANI, S.
- Abstract
In this study, the ferrocene weight was increased from 0.1 to 0.2 g to demonstrate the growth of MWCNTs on Si/SiO2/Al2O3 substrate. Ethylene was used as carbon precursor for CNTs nucleation. The as-grown multiwalled carbon nanotubes (MWCNTs) were investigated for the effect of ferrocene weight on yield and crystallinity of nanotubes. TEM, Raman and TGA studies revealed that an increase in ferrocene weight to a certain limit significantly improves the diameter, crystallinity, alignment and %yield of the product. However, above 0.15 g of ferrocene, few nanotubes were having surface defects and some black spots were also evident in TEM images. The lowest inner-shell spacing and ID/IG ratio were evident for 0.15 g ferrocene catalyst which was an indication of relatively pure CNTs growth. Raman spectra also confirmed the highly crystalline and relatively pure CNTs structures with ID/IG ratio of 0.851 for 0.15 g ferrocene. TGA data also revealed the formation of pure MWCNTs especially for 0.15 g ferrocene with oxidation temperature of 620°C.
- Subjects
FERROCENE; CHEMICAL vapor deposition; CRYSTAL growth; MULTIWALLED carbon nanotubes; SILICON oxide; ALUMINUM oxide
- Publication
Digest Journal of Nanomaterials & Biostructures (DJNB), 2017, Vol 12, Issue 4, p957
- ISSN
1842-3582
- Publication type
Article