Single-walled nanotubes (CNTs) and efforts to replace them in the nanoelectronics industry, based on their excellent mechanical and electrical conductivity properties such as metals (Nano-electronics)

Single-walled nanotubes (CNTs) and efforts to replace them in the nanoelectronics industry, based on their excellent mechanical and electrical conductivity properties such as metals (PhD in Nano-Microelectronics)

Researcher  and author: Dr.   (   Afshin Rashid)

Note: Single-walled carbon nanotubes, or CNTs, can be very conductive or semiconductor. This high electrical conductivity depends on the exact geometry of the carbon atoms. Single-walled carbon nanotubes, or CNTs, are referred to as a one-dimensional phenomenon.

The reason for the interest in these single-walled nanotubes (CNT) and the attempt to replace them in the industry is based on their excellent mechanical properties and electrical conductivity like metals. Of course, the production of single-walled nanotubes has a high cost and production It is difficult to stabilize their properties during the processing of nanotube polymers. Although nanotubes are manufactured using a technique that involves horizontal and vertical movements, in addition to being kept stationary, they are structurally controllable.

One of the disadvantages of multi-walled nanotubes compared to single-walled is that their strength is lower because the joints of the  inner plates are weak. However, since the current applications of CNT single-layer nanotubes in the amplification of electrical transmission line devices improve thermal and electrical properties to improve the mechanical properties and application of multi-walled carbon nanotubes or CNTs is very high. On the other hand, the existing techniques are not efficient enough to produce single-walled nanotubes and do not bring the necessary purity. Purification of these materials is very laborious and may ultimately damage the electrically conductive structure of CNT single-walled carbon nanotubes. CNT carbon nanotubes according to their geometric shape and single layer carbon nanotubes according to how their graphite plates are rolled into conductive or semiconductor in Coming. In other words, because the nanotubes appear at the molecular level as an intertwined wire beam,  the carbon atoms are connected in a hexagonal pattern, forming hexagonal cylindrical walls  that are only a few nanometers in size. . The torsion angle of a nanotube, defined as the angle between the axis of its hexagonal pattern  and the axis of the tube, determines whether it is conductive or non-conductive. Changing the radius also makes it  possible to close the band length and insulate the metal nanotube. So we can say that two basic parameters that play a key role in this  , one is the structure of the nanotube and the other is its diameter and size. 

Conclusion :

In electrical conductivity from a conductor to a semiconductor or an electrically changeable insulator of nanotubes depending on their structure and molecular chiral angle  . Because carbon nanotubes are able to pass electric current through their surface by frictional electron ballistic transfer  - this current is 100 times greater than the current passing through copper wire - so nanotubes are an ideal choice for  many applications. Are microelectronics.

Researcher  and author: Dr.   (   Afshin Rashid)

PhD in Nano-Microelectronics