An overview of carbon nanotubes and their fabrication method
Subject Areas : The Application of Chemistry in Environment
1 - Department of Physics, Naragh Branch, Islamic Azad University, Naragh, Iran
Keywords: Composite, Synthesis, Electrical Conductivity, Graphite, Carbon Nanotubes (CNTs),
Abstract :
Carbon nanotubes (CNTs) represent one of the most unique inventions in the field of nanotechnology. They have unique properties and characteristics. They have unique properties and characteristics. Carbon nanotubes have strong bonds between their atoms, and for this reason, they show great resistance and strength against tensile forces. But interatomic bonds in nanotubes, in addition to creating high strength, enable easy plasticity and even twisting in them. While steel only has resistance against tensile forces and does not have the necessary flexibility for twisting. The methods used to produce carbon nanotubes include laser ablation, electric arc discharge, chemical vapor deposition, plasma enhanced chemical vapor deposition, pulsed laser deposition, use of low-frequency ultrasound, bulk polymer heating, and bulk sputtering. CNTs have very good mechanical and thermal properties that strongly depend on their structure. Functionalized magnetic CNTs are involved in magnetic force microscopy used in biomedicine. The liquid and plastic limit of kaolinite can be increased by adding CNT to it. In the field of medicine, CNTs have many applications, including gene transfer to cells, cancer therapy, drug delivery, and tissue regeneration. Their antioxidant nature also allows them to be used in cosmetic and dermatological products. The most important property of nanotubes is their electrical conductivity, which varies depending on the arrangement of atoms. applications and their properties can be improved by making their composites with metals. Such metals may be introduced into the core of carbon nanotubes by various methods including solid state reaction, arc discharge method and electrochemical techniques. The amount of hydrogen gas absorbed in CNTs varies between 0.4 and 67% by mass.
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