The production and structure of pyrolytic carbon nanotubes (PCNTs)

Gas Sensors Based on Decorated Carbon Nanotubes

“…CNTs are formed during the condensation of vapor phase. The CVD process (Endo et al 1993) encompasses a wide range of synthesis techniques, from the gram-quantity bulk formation of nanotube containing materials to the formation of individual aligned SWCNTs on SiO 2 substrates for use in electronics. The majority of CNT methods are direct descendents of basic CVD.…”

Carbon Nanotubes – Imprinted Polymers: Hybrid Materials for Analytical Applications

“…Furthermore, it harnesses a variety of hydrocarbons in any state (solid, liquid, or gas), enables the use of various substrates, and allows CNTs growth in a variety of forms, such as powder, thin or thick films, aligned or entangled, straight or coiled, or even a desired architecture of nanotubes at predefined sites on a patterned substrate. MWNTs were grown from benzene, ethylene, methane, and many other hydrocarbons (Endo et al, 1993;José-Yacamán et al, 1993;Satiskumar et al, 1999;Hernadi et al, 1996). SWNTs were first produced by Dai et al from disproportionation of CO, and SWNTs were also produced from benzene, acetylene, ethylene, and methane using various catalysts.…”

Carbon Nanotubes and Carbon Nanotubes/Metal Oxide Heterostructures: Synthesis, Characterization and Electrochemical Property

“…However, although the catalyst was supplied in the gas-phase, nucleation of tube growth occurred only for iron species deposited on a quartz substrate, resulting in a surface growth mechanism and limiting yields to available surface area [51]. CVD techniques employing benzene pyrolosis [52] and the decomposition of ethylene [53] and acetylene [54] on supported metal catalysts have been demonstrated as viable large-scale production methods. MWCNTs have also been grown on supported metal particles or films via CVD [55][56][57][58][59], plasma-enhanced CVD [60][61][62][63][64][65][66][67][68][69][70], hot-wire chemical vapor deposition [71,72], and plasmawww.intechopen.com Carbon Nanotubes -Growth and Applications 8 enhanced HWCVD methods [73,74].…”