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- W1993549592 abstract "Methane gas (CH4) is a chemical compound comprising a carbon atom surrounded by four hydrogen atoms, and carbon nanotubes have been proposed as possible molecular containers for the storage of such gases. In this paper, we investigate the interaction energy between a CH4 molecule and a carbon nanotube using two different models for the CH4 molecule, the first discrete and the second continuous. In the first model, we consider the total interaction as the sum of the individual interactions between each atom of the molecule and the nanotube. We first determine the interaction energy by assuming that the carbon atom and one of the hydrogen atoms lie on the axis of the tube with the other three hydrogen atoms offset from the axis. Symmetry is assumed with regard to the arrangement of the three hydrogen atoms surrounding the carbon atom on the axis. We then rotate the atomic position into 100 discrete orientations and determine the average interaction energy from all orientations. In the second model, we approximate the CH4 molecule by assuming that the four hydrogen atoms are smeared over a spherical surface of a certain radius with the carbon atom located at the center of the sphere. The total interaction energy between the CH4 molecule and the carbon nanotube for this model is calculated as the sum of the individual interaction energies between both the carbon atom and the spherical surface and the carbon nanotube. These models are analyzed to determine the dimensions of the particular nanotubes which will readily suck-up CH4 molecules. Our results determine the minimum and maximum interaction energies required for CH4 encapsulation in different tube sizes, and establish the second model of the CH4 molecule as a simple and elegant model which might be exploited for other problems." @default.
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- W1993549592 date "2011-01-01" @default.
- W1993549592 modified "2023-10-17" @default.
- W1993549592 title "Encapsulation of methane molecules into carbon nanotubes" @default.
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- W1993549592 doi "https://doi.org/10.1016/j.physb.2010.10.027" @default.
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