Utilization of binary information encoded in the charge configuration of quantum-dot cells (the quantum-dot cellular automata, QCA, paradigm) requires surface-bound molecule-sized dots for room temperature operation. Molecular QCA cells are mixed-valence complexes, and the evaluation of a surface-bound unsymmetrical, heterobinuclear, two-dot, Fe-Ru molecular QCA cell is described. The tailed co...

The current Very Large-Scale Integration (VLSI) technology has reached its peak due to the fundamental physical limits of Complementary Metal-Oxide-Semiconductor (CMOS). Quantum-dot Cellular Automata (QCA) is considered a proper alternative CMOS in digital circuit design. QCA features like low power, small area, and high speed nanoscale A code converter that converts determined another one. Cod...

A quantum-dot cellular automata(QCA) is important technology to be with CMOS. QCA is expected to reach very high operating frequencies and significant reduction of power consumption. Reversible logic is an one-to-one mapping between the input and output vectors. Reversible logic is significant in QCA circuit with almost zero power dissipation. In this paper we propose a new reversible gate usin...

Quantum-Dot Cellular Automata (QCA) is a radical technology, which works at Nanoscale. Due to its numerous advantages over the conventional CMOS-based digital circuits, researchers are now concentrating more on designing digital circuits using this technology. Researchers have reported various findings in this field till now. In this paper, a modular 2:1 Multiplexer has been designed followed b...

Quantum-dot cellular automata (QCA) is important technology to be replaced with CMOS. QCA is a new paradigm for digital computing that, theoretically, is expected to reach very high operating frequencies and significant reduction of power consumption. A multiplexer is an important element and it is used in many logic gates and functional circuits. A NAND gate is smaller, area-wise and faster th...

In this paper, different circuits of Quantum-dot Cellular Automata (QCA) are proposed for the so-called coplanar crossing. Coplanar crossing is one of the most interesting features of QCA because it allows for mono-layered interconnected circuits, whereas CMOS technology needs different levels of metalization. However, the characteristics of the coplanar crossing make it prone to malfunction du...

Conventional lithography-based VLSI design technology deployed to optimize low-powered-computing and higher scale integration of semiconductor components. However, this downscaling trend confronts serious challenges of tunneling and leakage current increment to the Complementary Metal-Oxide-Semiconductor (CMOS) technology on nanoscale regimes. To resolve the physical restriction of the CMOS, Qu...

Although QCA (Quantum-dot Cellular Automata) has been introduced as a new kind of technology for over a decade, it still continued to be so and its merits and flaws were yet under study for future practical use. One of the problems of this technology has been the dependency of its circuit timing to its layout. An asynchronous design methodology for QCA has been offered to solve this problem. Th...