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Nanotechnology and Functional Materials for Engineers by Yaser Dahman

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Chapter 7

Nanotubes*

Abstract

Carbon nanotubes (CNTs) are one of the most valuable nano-scaled materials that are still under investigation with lots of potential toward the field of nanotechnology. CNTs are generally described as carbon cylindrical molecules. They can be classified into single-walled nanotubes (single layer of graphene) and multi-walled nanotubes (multiple layers of graphene). The properties of nanotubes are classified based on mechanical properties (e.g., high tensile strain), electrical properties (semiconductivity), and thermal properties (high thermal conductors). Production methods of the CNTs include to date arc discharge (produced through arc vaporization), laser ablation (continuous or pulsed laser is used to vaporize ...

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