Thermal CVD Growth of Carbon Nanotubes Thick Layers

Samuele Porro; Simone Musso; Mauro Giorcelli; Alberto Tagliaferro

doi:10.4028/www.scientific.net/AST.48.37

Paper Titles

Microplasma Synthesis of Carbon Nanostructured Materials
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Effect of Bias Voltage on the Physical Properties of Hydrogenated Amorphous Carbon Films Grown by Electron Cyclotron Resonance Chemical Vapour Deposition
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CVD Grow of Nano Diamond and Other Carbon Materials on Porous Carbon
p.24

Synthesis and Characterization of Single-Wall Carbon Nanotubes Grown by Chemical Deposition of Ethanol Vapor
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Thermal CVD Growth of Carbon Nanotubes Thick Layers
p.37

Nanocrystalline Diamond Films by Bias Enhanced Nucleation and Argon Assisted Growth in a HFCVD System
p.44

Purification of Multi-Walled Carbon Nanotubes Grown by Thermal CVD on Fe-Based Catalyst
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Influence of Temperature on Nano-Graphene Structuring of PLD Grown Carbon Films - An X-Ray Diffraction Study
p.55

XRDT and TEM Study of Defects and Polytypism in Natural Moissanite and Synthetic SiC Crystals
p.61

HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 48Thermal CVD Growth of Carbon Nanotubes Thick...

Thermal CVD Growth of Carbon Nanotubes Thick Layers

Abstract:

Since their discovery, carbon nanotubes received a great deal of attention because of unique physical and chemical properties. However, in order to become of interest in the field of super resistant fibers for nanocomposite materials or in the production of textile material, very long carbon nanotubes are needed. Massive samples of well packed, vertically aligned and very long selfstanding multi wall carbon nanotubes (MWNT) were synthesized on uncoated silicon by a very efficient thermal CVD process, which involved the co-evaporation of camphor and ferrocene in a nitrogen atmosphere. We obtained structures with diameter between 20 and 80 nm with an average growth rate of about 400 nm/s, organized in thick carpets of entangled nanotubes. By the weight of the deposited carpet of MWNTs (density circa 0.8 g/cm3) the conversion of about 30% of the total hydrocarbon feedstock was calculated. Morphology and physical properties were characterized by electron microscopy techniques, Micro- Raman spectroscopy and thermogravimetric analysis. The analyses performed showed the absence of secondary carbonaceous products, whereas only 6% in weight of ferromagnetic iron clusters are present. BET analysis was used to calculate the porosity and the specific surface area density of the as grown samples, which resulted approximately 70 m2/g. Hydrophobicity of the CNT carpet was also investigated.