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Issue 33, 2019
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First-principles study of Ni adatom migration on graphene with vacancies

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Abstract

A theoretical study based on first-principles calculations about the interaction and diffusion of Ni atoms on pristine graphene and graphene with a single vacancy is presented. In the first case, we explored the structural changes due to the adsorption of Ni on graphene and the effects on the electronic structure. In the case of graphene with a vacancy, we analyzed the impact of the adsorbed Ni atom on the distortion of the graphene structure and how it depends on the distance from the graphene defect. In the analysis, we observed the changes in the electron localization function and the charge density. By knowing the interaction map of Ni with graphene, and the structural changes of the network, we performed energy barrier calculations within the climbing image nudged elastic band methodology to study the nickel diffusion. Finally, we explored how the vacancy and structural distortions affect the minimum energy paths and the saddle points for nickel moving away, around, and towards the vacancy.

Graphical abstract: First-principles study of Ni adatom migration on graphene with vacancies

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Article information


Submitted
07 Feb 2019
Accepted
01 Jun 2019
First published
14 Jun 2019

This article is Open Access

RSC Adv., 2019,9, 18823-18834
Article type
Paper

First-principles study of Ni adatom migration on graphene with vacancies

E. E. Hernández-Vázquez, F. Munoz, S. López-Moreno and J. L. Morán-López, RSC Adv., 2019, 9, 18823
DOI: 10.1039/C9RA00999J

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