Field Effect Nano Transistors (Nano Teransistor Mosfet)

Field effect nano transistors with elastic properties, conductivity, high strength 

Researcher  and author: Dr.   (   Afshin Rashid)



Note: In nanosciences, especially (nanoelectronics), carbon nanotubes are of great interest for the production of nanotransistors and nanochips due to their unique properties such as elasticity, conductivity, and high strength. The production methods of  these nanostructures are divided into two general categories of methods based on solid carbon and gaseous carbon.

Two common points in nanotube production methods are based on solid carbon source, such as laser abrasion, electric arc discharge and the use of  high temperature environment (between 0111 and 0111 K) and erosion of solid graphite as a carbon source. Despite these commonalities, the morphology, morphology of  the carbon nanostructure and the production efficiency of carbon nanotubes are significantly different according to the experimental conditions. Before the advent of  carbon nanotubes, fullerene was produced using these methods. The production of carbon nanotubes  requires the presence of a catalyst in addition to the necessary conditions for the production of fullerene at high temperature and the absence of oxygen. Various mechanisms, such as the separation process of carbon molecules and the recombination of atoms, etc., are involved in these high temperature methods. The main mechanism of these methods is the transfer of energy from the external radiation source of a laser beam or solar radiation to the target material. This leads  to the erosion of the target material and subsequently the formation of plasma. The degree of plasma ionization highlights the importance of energy transfer between the plasma and the target material. The characteristic of plasma and especially the temperature range and  concentration of different species in plasma depends not only on the nature and composition of the target substance but also on the amount of transferred energy.



For the production of nanotransistors and nanochips, one of the advantages of these methods is the ease of changing the process parameters and achieving optimal conditions for the production of carbon nanotubes. A major challenge of  these methods is the impurities in the products. Carbon nanotubes are produced together with other carbon phases and the remaining catalyst. Most of the available purification methods are based on oxidation, like acid-based methods, which will affect the structure of  single-walled nanotubes. A desirable approach for purification is to heat the material at 0011° under a neutral atmosphere. The graphite plate containing the catalyst is placed in the middle of the quartz tube containing neutral gas (such as helium and argon). Then this system is placed in the oven with a  temperature of 0.11 degrees. The laser beam is focused on the graphite plate and leads to uniform surface evaporation. Carbon vapor It is swept by the flow of neutral gas and deposited like soot on various surfaces, including the water-cooled copper collector, the wall of the quartz tube, and the end of the  graphite plate. This process depends on many parameters such as the characteristics of the laser beam, the applied power density, the nature of the target and the  surrounding environment. For example, a solid target can simply be heated, melted, or vaporized depending on the applied power. So far, several approaches have been taken to improve the production efficiency of carbon nanotubes and nanotransistors with laser abrasion.



Conclusion : 

In nanosciences, especially (nanoelectronics), it is of great interest to produce nanotransistors and nanochips from carbon nanotubes due to its unique properties such as elasticity, conductivity, and high strength. The production methods of  these nanostructures are divided into two general categories of methods based on solid carbon and gaseous carbon.

Researcher  and author: Dr.   (   Afshin Rashid)

Specialized doctorate in nano-microelectronics