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Journal of Nanomaterials
Volume 2013 (2013), Article ID 702094, 7 pages
http://dx.doi.org/10.1155/2013/702094
Research Article

Multifunctional Logic Gate by Means of Nanodot Array with Different Arrangements

Graduate School of Information Science and Technology, Hokkaido University, Sapporo 060-0814, Japan

Received 8 November 2012; Revised 11 February 2013; Accepted 12 February 2013

Academic Editor: Sung Oh Cho

Copyright © 2013 Yasuo Takahashi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Multifunctional logic gate devices consisting of a nanodot array are studied from the viewpoint of single electronics. In a nanodot array, the dots come in a random variety of sizes, which sometimes has a negative effect on the performance of electrical device applications. Here, this feature is used in a positive sense to achieve higher functionality in the form of flexible logic gates with low power consumption in which the variability of logic functions is guaranteed. Nanodot arrays with two input gates and one control gate in a variety of arrangements are considered, in which the two-input logic functions (such as NAND, NOR, or exclusive-OR (XOR) gates) are selected by changing the voltage applied to the control gate. To ensure the flexibility of the device, it is important to guarantee the performance with any one of the six important logic functions: NAND, AND, NOR, OR, XOR, and XNOR. We ran a selection simulation using a nanodot array consisting of six nanodots with different dot arrangements to clarify the relation between the variability of the logic functions and the dot arrangements.