Condensed phases of gases inside nanotube bundles

Details Condensed phases of gases inside nanotube bundles Condensed phases of gases inside nanotube bundles

2001-03-29

arxiv.org/abs/cond-mat/0103607v1

Physics

Condensed Matter

Soft Condensed Matter

12 fig., submitted to Review of Modern Physics Colloquia

Scientific paper

An overview is presented of the various phases predicted to occur when gases are absorbed within a bundle of carbon nanotubes. The behavior may be characterized by an effective dimensionality, which depends on the species and the temperature. Small molecules are strongly attracted to the interstitial channels between tubes. There, they undergo transitions between ordered and disordered quasi-one dimensional (1D) phases. Both small and large molecules display 1D and /or 2D phase behavior when adsorbed within the nanotubes, depending on the species and thermodynamic conditions. Finally, molecules adsorbed on the external surface of the bundle exhibit 1D behavior (striped phases), which crosses over to 2D behavior (monolayer film) and eventually 3D behavior (thick film) as the coverage is increased. The various phases exhibit a wide variety of thermal and other properties that we discuss here.

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