chicksvef.blogg.se - Carbon nanotubes ppt powerpoint

Carbon is vaporized between two carbon electrodes.The diameter of the nanotubes depends on the Nanotube (middle) and a (10, 5) chiral nanotube. Shown here is a (5,ĥ) armchair nanotube (top), a (9, 0) zigzag Sheet into a cylinder and capping each end with Nanotubes are formed by rolling up a graphene By this way itĬan be identified whether if the carbon atoms areĪrranged in a zig-zag, armchair or in a helical The way to find out how the carbon atoms areĪrranged in a molecule can be done by joining the Carbon nanotubesĪpplications, including their application in Single-walled carbon nanotubes, or one of smaller Nanotubes pack either in bundles (one next to Long (several hundreds of nanometers and more).įullerenes. How large is the graphene area that is folded

Many different radii can be found (depending on

Within a particular type, carbon nanotubes with Three types of carbon nanotubes are obtained. The graphene plane is 'cut' before rolled up, the Thought of as graphene planes 'rolled up' in aĬylinder (the closing ends of carbon nanotubesĬannot be obtained in this way). Types of carbon nanotubes armchair, zig-zag andĬhiral (helical) nanotubes. TheĬylinders are typically closed at their ends by

This is a nanoscopic structure made of carbonĪtoms in the shape of a hollow cylinder.

Graphitic structures including nanoparticles and He found that the central core of theĬathodic deposit contained a variety of closed Studying the material deposited on the cathodeįullerenes.

They were discovered in 1991 by the JapaneseĮlectron microscopist Sumio Iijima who was.

Structures which consist of graphene cylindersĬlosed at either end with caps containing