Seemingly simple nanoscale systems in miniaturization and performance improvement of electronic devices

Seemingly simple nanoscale systems in miniaturization and performance improvement of electronic devices (PhD in nano-microelectronics)

Researcher  and author: Dr.   (   Afshin Rashid)

Note: The seemingly simple nanoscale systems are very effective in miniaturizing and improving the efficiency of electronic devices. These systems also show interesting features in the occurrence of phenomena based on quantum interference. 

Conductive effects can be mentioned especially in the case of annular nanostructures. One of the most important cyclic systems is graphene, which is known as the first stable two-dimensional structure in dense matter. The advent of graphene has had a major impact on the development of molecular electronics. However, due to the lack of a gap in its energy spectrum, it is difficult to precisely control its conductivity. A possible solution to this bottleneck is to limit graphene to one dimension and create graphene nanofibers that create a gap in the energy spectrum. The size of this gap can be controlled by the width and circumference of the  structure, and according to the structure of nanofibers that are composed of graphene rings, the effect of their electrical conductivity can be controlled by the magnetic flux passing through the rings of nanotubes.If the width of a narrow strip of thin graphene changes, in this case from seven to nine atoms, a special region is created in the transition, because the electronic properties of the two regions are "protected" differently by a special, so-called topological method. Therefore, a very strong new quantum state is created in the transition region. This local electronic quantum state can now be used as a primary property for the production of special semiconductors, metals, or insulators - and possibly even as a property in nanoelectronics.

Based on these novel quantum chains, precision nanotransistors can be made. The strength of the joints increases due to the scattering of the grain boundary and the scattering of the side wall of the electrons. Increased joule heating and low current carrying capacity of nanoscale joints,  and  due to its remarkable electrical properties and other properties,  graphene becomes a reliable candidate for next-generation joints. Graphene is the lowest resistance material with high current density, large average free path and high electron mobility. For practical implementation, narrow graphene sheet or graphene nanoribbon (GNR) is the most suitable bonding material. However, the geometric structure changes the electrical properties of GNR slightly compared to the ideal behavior of graphene film. 

Conclusion : 

 Nanoscale seemingly simple systems are very effective in miniaturizing and improving the efficiency of electronic devices. These systems also show interesting features in the occurrence of phenomena based on quantum interference. 

Researcher  and author: Dr.   (   Afshin Rashid)

PhD in Nano-Microelectronics