Gas molecule sensing (CO) with defect silicene monolayer: a turbo EELS study

Document Type : Full length research Paper

Authors

1 Department of Physics, Central Tehran Branch, Islamic Azad University, Tehran, Iran

2 Isfahan University of Technology

Abstract

Increasing demand for highly sensitive, selective, affordable, low-consumption, durable and portable sensors has led to extensive research into the use of two-dimensional materials. Two-dimensional materials are very suitable for making gaseous sensors due to good optical clarity, high flexibility, high mechanical strength, and special electronic and optoelectronic properties. In this paper, the electronic, optical and magnetic properties of pure and defected silicene monolayer in the presence of carbon monoxide gas has been studied using first principles calculations based on density functional theory and time-dependent density functional theory. According to the investigations, we find that the optical and electronic properties of the system are altered by the absorption of the gas molecule and the vacancy defect. Here, the electron energy loss spectroscopy for pure silicene monolayer in the presence of gaseous molecule and vacancies defect have been investigated. The spectrum associated with them indicates that the plasma peak changes (Collective modes).

Keywords

References

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History

  • Receive Date: 28 August 2018
  • Revise Date: 26 November 2019
  • Accept Date: 09 May 2020

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