Title

First principles Investigation on the elastic properties of Mg, Ca, K-decorated planar aluminene

College

College of Science

Department/Unit

Physics

Document Type

Conference Proceeding

Source Title

2019 IEEE 11th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment, and Management, HNICEM 2019

Publication Date

11-1-2019

Abstract

With 2D materials rising as candidates for hydrogen storage media, it is important to understand their mechanical properties. Using density functional theory, this study investigated Mg, Ca, and K as dopants to aluminene to determine their effects on its physical properties. Calculations were carried out using Vienna ab initio simulation package (VASP) with Perdew-Burke-Erzernhof (PBE) as generalized gradient approximation (GGA) exchange correlation functional. The brillouin zone sampling was set to 8 by 8 by 1 mesh size, and the energy cut-off of 450 eV. Density functional theory were employed to determine the best possible site (either at the hollow, bridge, or top) for adsorption, and to obtain stress-strain graphs. Among the three sites it was found that the Mg, Ca, and K decorations all prefer the hollow site for adsorption. With its shortest distances also located at that site. As for the stress-strain graph it was found to have a low strain as seen by its linear behavior. Lastly obtaining the slope gave the elastic modulus and stiffness, and with the introduction of the decorations at the hollow site increases its property values. Results showed better stiffness and modulus compared to pristine aluminene. © 2019 IEEE.

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Digitial Object Identifier (DOI)

10.1109/HNICEM48295.2019.9073435

Keywords

Elasticity; Density functionals

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