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Detailed investigation on single water molecule entering carbon nanotubes

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Abstract

The behavior of a water molecule entering carbon nanotubes (CNTs) is studied. The Lennard-Jones potential function together with the continuum approximation is used to obtain the van der Waals interaction between a single-walled CNT (SWCNT) and a single water molecule. Three orientations are chosen for the water molecule as the center of mass is on the axis of nanotube. Extensive studies on the variations of force, energy, and velocity distributions are performed by varying the nanotube radius and the orientations of the water molecule. The force and energy distributions are validated by those obtained from molecular dynamics (MD) simulations. The acceptance radius of the nanotube for sucking the water molecule inside is derived, in which the limit of the radius is specified so that the nanotube is favorable to absorb the water molecule. The velocities of a single water molecule entering CNTs are calculated and the maximum entrance and the interior velocity for different orientations are assigned and compared.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Guilan, Rasht, 3756, Iran

    R. Ansari & E. Kazemi

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  1. R. Ansari
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  2. E. Kazemi
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Correspondence to R. Ansari.

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Ansari, R., Kazemi, E. Detailed investigation on single water molecule entering carbon nanotubes. Appl. Math. Mech.-Engl. Ed. 33, 1287–1300 (2012). https://doi.org/10.1007/s10483-012-1622-8

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  • DOI: https://doi.org/10.1007/s10483-012-1622-8

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Chinese Library Classification

2010 Mathematics Subject Classification

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