Abstract
Graphene nanomaterial exhibit promising properties for use in future nanoelectronics application. This paper reported a study investigating the use of defective armchair graphene nanoribbon (AGNR) formed using oxygen ion bombardment process using atomistic simulation for sensing oxygen, O <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> gas molecules. The adsorption energy, charge transfer and device sensitivity were calculated when the O <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> molecules are placed on top of the flat defect area and top of the ripple area in the defective AGNR. The result shows that all types of defects formed resulting from the oxygen ion bombardment process greatly influence the sensing properties. It is noticed from the analysis that the ripple area is more sensitive than the flat area, of more than 50% improvement. The outcome of this study indicates that there is a possibility of improving the sensing properties of AGNR by modifying the surface morphology.
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