How to Catalyze Nano Particles in CNT and CNTs Carbon Nanotubes (PhD in Nano-Microelectronics)
Researcher and author: Dr. ( Afshin Rashid)
Note: The properties and characteristics of nanoparticles generally depend on their material and size and have so many applications in various industries that it is not possible to study all of them. All the properties and characteristics that are created in nanoparticles can be explained by two factors: increasing the surface area relative to the volume and breaking the energy levels.
By changing the size of the nanoparticles, the distance between the energy levels in them changes. The smaller the nanoparticle size, the greater the distance between the energy levels, and the larger the size, the smaller the distance between the energy levels. This makes it possible to adjust the distance between their energy levels by changing the size of the nanoparticles to determine the absorption frequency of certain waves. For example, the dimensions of nanoparticles of a certain material can be adjusted to absorb infrared, ultraviolet, radio, etc. waves. A catalyst is a substance that changes the rate of a chemical reaction (increase or decrease) but does not participate in the chemical reaction itself. The factor that has a great impact on the quality and performance of catalysts is a variable called its specific area. The larger the area of a catalyst, the more suitable its catalytic properties. The specific area of a catalyst is obtained using Equation 1:
This quantity is usually reported in terms of square meters per gram and its value for commercial catalysts is between 100 and 400 square meters per gram. 100 square meters per gram means that 1 gram of this material has an area of 100 square meters.
Nanoparticles can also be used as catalysts due to their high surface area. Of course, catalytic properties, like magnetic properties, occur in certain dimensions. In other words, nanoparticles usually have catalytic properties if their specific surface area is between 100 and 400 square meters per gram. Therefore, among nanoparticles with a certain volume, nanoparticles that have a higher surface area show more suitable catalytic properties. Samples of nanoparticles that act as catalysts on which various materials are placed on the surface and chemical reactions take place. Apart from the above, nanoparticles have many other applications in various medical industries (drug delivery, etc.), automobiles (anti-vaporization of glass, lightening of the body, hardening of rubber), electronics (manufacturing of transistors), etc. Strength Carbon-carbon bonds give carbon nanotubes amazing electronic properties. No previous material exhibits a combination of extraordinary mechanical, thermal and electronic properties attributed to them . However, their conductivity is what separates them. Laminated carbon nanotubes are the strongest electronically conductive materials humans have ever discovered. The highest tensile strength or fracture strain for a carbon nanotube was up to 63 GPa, which is about 50 times higher than the strongest conductors. Even the weakest types of multilayer carbon nanotubes have multiplier power in electronic conductivity. These properties, combined with the lightness of carbon nanotubes, give them great potential in applications such as aerospace. The electronic properties of carbon nanotube wall walls are also outstanding. It has high electrical conductivity (comparable to copper). It is particularly noteworthy that nanotubes can be metal or semiconductor. The rolling action breaks the symmetry of the planar system and imposes a certain direction with respect to the hexagonal lattice and the axial direction. Depending on the relationship of this axial direction and the unit vectors that describe the hexagonal lattice, nanotubes may behave electrically like metal or semiconductors , some nanotubes have a higher conductivity than copper, while Others behave more like silicon. And there are capabilities to make nanoelectronic devices from multilayer CNTs.
Conclusion :
The properties and characteristics of nanoparticles generally depend on their material and size and have so many applications in various industries that it is not possible to study all of them. All the properties and characteristics that are created in nanoparticles can be explained by two factors: increasing the surface area relative to the volume and breaking the energy levels.
Researcher and author: Dr. ( Afshin Rashid)
PhD in Nano-Microelectronics