_ Nanoreactors and (nanostructures) section

Structure and function of active nanoparticles  in  the process of simulating  nanoreactors Nano reactor 

Researcher  and Author: Dr.   (   Afshin Rashid)

Note: Active Nano particles  are  of great interest in both industry and natural sciences due to their wide range of applications.  While natural materials have constant physical properties regardless of size, the size of a nano particle determines its physical and chemical properties.

 Therefore, the properties of a material change as its size approaches the nanoscale and the percentage of atoms on the surface of the material becomes significant. An important feature of all nanostructures is that the number of surface atoms in them is greater than the number of atoms in the volume. This ratio increases with decreasing nanoparticle size. Therefore, the size of the nanoparticle is its important feature. The range of change in the activity of nanoparticles depends on the nature and shape of the nanostructure.  However, if the energy of the nanoparticle field is comparable to the energy of electromagnetic radiation and if  significant changes occur in the material under irradiation within a certain wavelength range due to the occurrence of chemical reactions, the activity of nanoparticles  up to 100 nm will be significant.



The use of particles from the micro to nanoscale provides advantages for various scientific fields, but since a large percentage of their atoms are located on the surface, nanomaterials can react a lot and carry potential risks for humans. The atoms on the surface of nanoparticles are not compensated in terms of energy. In general, the results of the growth of the energy of  nanoparticles can be expressed as the total energy of the atoms on the surface of the particle. The freedom of movement of the atoms on the surface of nanostructures  is limited and only vibrational movements and electron motion are possible. These two electrokinetic reactions  are interdependent because the displacement of the electron clouds of atoms necessarily changes the vibrational frequencies of the bonds of the atoms of nanoparticles  . On the other hand, the change in the location of the valence electrons in the bonds changes the polarity of the bond and the so-called supermolecules  . In this case, the electron transfer to a higher energy level becomes possible. In this respect, carbon nanotubes (CNTs) are the most interesting species under investigation. In these, carbon nanotubes  interact, which protects them from the environment, and for this reason, these CNTs are  called metal/carbon nanotubes.


Conclusion: 

The use of particles from microscale to nanoscale provides advantages for various scientific fields, but because a large percentage of their atoms are on the surface, nanomaterials can react greatly and pose potential risks to humans.

Researcher  and Author: Dr.   (   Afshin Rashid)

Specialized PhD in Nano-Microelectronics