| Abstract |
The quantum-dot cellular automata are one of the emerging nanoscale technologies for creating nanoelectronic circuits for smart cities and smart computational systems. Quantum-dot nanoelectronic technology is a rapidly evolving field that encompasses the development of nano-sensors in nanoscale dimensions for applications, such as smart cities, Cityzenith, and digital twins. Nanoelectronic-based nano-devices are significantly used in the creation of high-performance analysis. The nanomaterials and nanoelectronic circuits play an important role in developing the 5G wireless communications technology, smart equipment, and building construction for smart cities. It will become the backbone of future microelectronic and photonic devices capable of trapping electrons in three dimensions. In this chapter, a coplanar single-layer hybrid half adder-subtractor (SHHAS) and a multilayer hybrid half adder-subtractor (MHHAS) on nanoscale-based circuits for the development of smart nanoelectronic devices for smart cities are discussed. The proposed designs used smart QCADesigner-E (Energy) version 2.2 tool to implement circuits and optimize energy dissipation. The presented work of coplanar single-layer HHAS and multi-layer HHAS digital computational circuits occupied a minimum design area of 0.0248 μm2 and 0.300 μm2 with 0.50 clock cycle latency and 32 and 41 QCA cells, respectively, using synchronize clocking and routing algorithm. Finally, the proposed quantum-dot-based nanoelectronic smart circuits design compared with the two existing designs, such as adjoined adder-subtractor and controlled half adder-subtractor, in terms of the design area, cost, delay, and quantum-cell counts. © 2023 selection and editorial matter, Alex Khang, Sita Rani, and Arun Kumar Sivaraman. All rights reserved. |
