Diffusivity of liquid argon in carbon nanotubes

Hiroki Akiyoshi, Kenichiro Koga

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    We present molecular dynamics simulation results on the system size dependence and the tube diameter dependence of the self-diffusion coefficient of liquid argon confined in carbon nanotubes. The tube diameter is varied from 1 nm to 10 nm under the condition of fixed temperature and fixed axial pressure. Variation of the diffusion coefficient in a nanoscale diameter range is large and intricate, which is caused by a variety of underlying structures of liquid argon in the carbon nanotube. In a mesoscopic range, as the diameter is increased, the diffusion coefficient gradually increases and approaches the limiting value of the bulk liquid. The rate of approach is significantly slow compared to the rate of approach of the density to the bulk density. A main reason is found to be formation of solid like structure in the vicinity of the cylindrical wall.

    Original languageEnglish
    Article numberSA022
    Journaljournal of the physical society of japan
    Volume81
    Issue numberSUPPL. A
    DOIs
    Publication statusPublished - Sep 2012

    Keywords

    • Argon
    • Carbon nanotube
    • Confined liquid
    • Cylindrical pore
    • Diffusion coefficient

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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