%0 Journal Article %T Novel Design of n-bit Controllable Inverter by Quantum-dot Cellular Automata %J International Journal of Nanoscience and Nanotechnology %I Iranian Nanotechnology Society %Z 1735-7004 %A Kianpour, M. %A Sabbaghi-Nadooshan, R. %D 2014 %\ 06/01/2014 %V 10 %N 2 %P 117-126 %! Novel Design of n-bit Controllable Inverter by Quantum-dot Cellular Automata %K Exclusive OR(XOR) gate %K Inverter %K Majority Gate %K Quantum-dot Cellular Automata(QCA) %R %X Application of quantum-dot is a promising technology for implementing digital systems at nano-scale.  Quantum-dot Cellular Automata (QCA) is a system with low power consumption and a potentially high density and regularity. Also, QCA supports the new devices with nanotechnology architecture. This technique works based on electron interactions inside quantum-dots leading to emergence of quantum features and decreasing the problem of future integrated circuits in terms of size. In this paper, we will successfully design, implement and simulate a new 2-input and 3-input XOR gate (exclusive OR gate) based on QCA with the minimum delay, area and complexities. Then, we will use XOR gates presented in this paper, in 2-bit, 4-bit and 8-bit controllable inverter in QCA. Being potentially pipeline, the QCA technology calculates with the maximum operating speed. We can use this controllable inverter in the n-bit adder/subtractor and reversible gate. %U https://www.ijnnonline.net/article_6117_77887abb402c5ffd6484f1e27ac00869.pdf