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Sensors 2019, 19(6), 1295; https://doi.org/10.3390/s19061295

Electrical Properties of Two-Dimensional Materials Used in Gas Sensors

Departamento de Ingeniería en Materiales, Instituto Tecnológico Superior de Irapuato (ITESI), Carretera Irapuato-Silao Km. 12.5, Irapuato, Guanajuato 36821, Mexico
Received: 3 January 2019 / Revised: 10 February 2019 / Accepted: 8 March 2019 / Published: 14 March 2019
(This article belongs to the Special Issue Graphene Based Sensors and Electronics)
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Abstract

In the search for gas sensing materials, two-dimensional materials offer the possibility of designing sensors capable of tuning the electronic band structure by controlling their thickness, quantity of dopants, alloying between different materials, vertical stacking, and the presence of gases. Through materials engineering it is feasible to study the electrical properties of two-dimensional materials which are directly related to their crystalline structure, first Brillouin zone, and dispersion energy, the latter estimated through the tight-binding model. A review of the electrical properties directly related to the crystalline structure of these materials is made in this article for the two-dimensional materials used in the design of gas sensors. It was found that most 2D sensing materials have a hexagonal crystalline structure, although some materials have monoclinic, orthorhombic and triclinic structures. Through the simulation of the mathematical models of the dispersion energy, two-dimensional and three-dimensional electronic band structures were predicted for graphene, hexagonal boron nitride (h-BN) and silicene, which must be known before designing a gas sensor. View Full-Text
Keywords: mathematical modeling; gas sensors; two-dimensional materials; graphene; transition metal dichalcogenides; field effect transistors; chemiresistors mathematical modeling; gas sensors; two-dimensional materials; graphene; transition metal dichalcogenides; field effect transistors; chemiresistors
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Vargas-Bernal, R. Electrical Properties of Two-Dimensional Materials Used in Gas Sensors. Sensors 2019, 19, 1295.

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