Abstract
Carbon Nanotubes are one the most important materials of future. Discovered in 1991, they have reached a stage of attracting the interests of many companies world wide for their large scale production. They possess remarkable electrical, mechanical, optical, thermal and chemical properties, which make them a perfect “fit” for many engineering applications. In this paper various methods of production of carbon nanotubes are discussed outlining their capabilities, efficiencies and possible exploitation as economic large scale production methods. Chemical vapor disposition (CVD) is proposed as a potential method for economic large scale production of carbon nanotubes due to its relative simplicity of operation, process control, energy efficiency, raw materials used, capability to scale up as large unit operation, high yield and purity.
Highlights
Carbon nanotubes (CNTs) are allotropes of carbon
Chemical vapor disposition (CVD) is proposed as a potential method for economic large scale production of carbon nanotubes due to its relative simplicity of operation, process control, energy efficiency, raw materials used, capability to scale up as large unit operation, high yield and purity
Multi walled nanotubes (MWNT), these comprise an array of nanotubes one concentrically placed inside another like rings of a tree trunk
Summary
A carbon nanotube is a one-atom thick sheet of graphite (called graphene) rolled up into a seamless cylinder with diameter of the order of a nanometer This results in a nanostructure where the length-to-diameter ratio exceeds 10,000. Such cylindrical carbon molecules have novel properties that make them potentially useful in a wide variety of applications in mechanical, structural, thermal, electrical & electronics, optical, biomedical and other fields of science, engineering & medicine. Ilijima’s discovery of carbon nanotubes in the insoluble material of arc-burned graphite rods created the buzz that greatly accelerated work on synthesis, production and properties of carbon nanotubes. Multi walled nanotubes (MWNT), these comprise an array of nanotubes one concentrically placed inside another like rings of a tree trunk
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