_ Department (Nano and Micro Electromechanical MEMS )
(Nano and Micro Electromechanical MEMS ) in Nano-Optical Devices (xAs-AlxGa1) in (45.0<x)
Researcher and author: Dr. ( Afshin Rashid)
Note: (Nano and Micro Electro -Mechanical MEMS ) systems in nano-optical devices find (xAs-AlxGa1) in (45.0 < x) condition along with changes in the distance between the valence band edge and the conduction band edge with changing x in three different directions of wave propagation.
Due to the lack of suitable insulators for use in transistor gates, as well as the high cost of the elements and the deposition process of compound semiconductors, silicon and ultimately the silicon-germanium alloy continue to be the main semiconductors used. It should be noted that (nano and micro- electromechanical MEMS) systems , which can be easily deposited with high purity, are very suitable insulators for this purpose. Today, in integrated circuits with channel lengths below 50nm, alternative oxides with higher dielectric constants such as zirconium oxide ZrO2 and hafnium oxide are used. The use of HfO2 in ternary alloys of compound materials can be achieved by changing the ratio of the two elements present, different properties for the semiconductor. For example, in xAs-AlxGa1 and xN-InxGa1, changing x leads to a change in the energy gap and many of the properties of these semiconductor compound materials are due to the band structure energy.
In the structure of (nano and micro- electromechanical MEMS) systems, one of the most important properties of metal nanoparticles is their electronic properties. Metal nanoparticles are a semiconductor with a zero band gap and high electrical conductivity. As we know, each carbon atom has 1 electron that participates in chemical bonds, but in graphene, each carbon atom is connected to 9 other carbon atoms in a two-dimensional space. The remaining single atoms create p orbitals at the top and bottom of the graphene plane, and these orbitals create carbon-carbon double bonds. The electronic properties in (nano and micro- electromechanical MEMS) systems are imposed on graphene by (bonding orbitals) and ( antibonding orbitals) of double bonds. Graphene shows very high electron mobility at ambient temperature.
In the structure of (nano and micro- electro-mechanical MEMS) systems, the optical strength of metal nanoparticles is 22, the breaking strength is 12 m N and its Young's modulus is 4 Tpa. Despite its high hardness and strength, it is very light and its density is (1.77 ml/mg). The (optical) properties of the monolayer membrane of metal nanoparticles are measured by the AFM technique.
Conclusion:
(Nano and Micro Electromechanical MEMS ) systems in nano-optical devices find (xAs-AlxGa1) in (45.0 < x) with variations in the distance between the valence band edge and the conduction band edge with changes in x in three different directions of wave propagation.
Researcher and author: Dr. ( Afshin Rashid)
Specialized PhD in Nano-Microelectronics