Synthesis of Carbon Nanotubes at 600°C via Floating Catalyst Chemical Vapor Deposition Method

Carbon nanotubes (CNTs) are widely synthesized at high temperatures using floating catalytic chemical vapor deposition (FC - CVD). In order to promote the growth of CNTs, it is important to lower the synthesis temperature of CNT in order to prevent autothermal decomposition of hydrocarbons. This research aims to synthesize CNTs at low temperature by improving some of the techniques used. An in situ monitoring device is used to monitor the temperature distribution within the reactor to initiate the reaction.

Techniques for developing carbon nanotubes include arc discharge, laser ablation, chemical vapor deposition, and n-hexane pyrolysis. In order to produce carbon nanotubes, essentially three elements of carbon, heat and catalyst are essential. The process of producing carbon nanotubes is very complicated and expensive. These factors are presumed to limit the growth of the nanotube market during the forecast period. The world's nanotube market can be geographically separated into Europe, North America, Asia Pacific and other regions (lines). In the current situation, North America and Europe dominate the worldwide carbon nanotube market in terms of revenue. North America's major economies to promote market growth are the United States and Canada. Europe and North America are economic powers and invest in research and technology. The main European countries are the UK, Germany, France, Italy and Spain.

One of the most common manufacturing methods used for producing carbon nanotubes is called chemical vapor deposition (CVD). Of these, alkanes and alkenes are used to separate carbon from compounds in the presence of metal catalysts in which nanotubes settle. Thereafter, the nanotubes are separated from the metal surface using various decontamination procedures. However, CVD is an extremely expensive process, often hampering price trends and applicability of carbon nanotubes in the end user industry.

The evolution of material science and the development of the end user industry will change the carbon nanotube market

Production of the rectenna begins with a forest that grows vertically oriented carbon nanotubes on a conductive substrate. Using atomic layer chemical vapor deposition, the nanotubes are coated with alumina material to insulate the nanotubes. Finally, a thin layer of optically transparent calcium is deposited on top of the nanotube forest using physical vapor deposition and then aluminum metal is deposited. The work function difference between nanotubes and calcium provides a potential of about 2 eV which is sufficient to drive electrons out of the carbon nanotube antenna when electrons are excited by light.