Isotopic and spin selectivity ofadsorbed in bundles of carbon nanotubes
- 16 January 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 67 (3), 035410
- https://doi.org/10.1103/physrevb.67.035410
Abstract
Due to its large surface area and strongly attractive potential, a bundle of carbon nanotubes is an ideal substrate material for gas storage. In addition, adsorption in nanotubes can be exploited in order to separate the components of a mixture. In this paper, we investigate the preferential adsorption of versus (isotope selectivity) and of ortho versus para (spin selectivity) molecules confined in the one-dimensional grooves and interstitial channels of carbon nanotube bundles. We perform selectivity calculations in the low coverage regime, neglecting interactions between adsorbate molecules. We find substantial spin selectivity for a range of temperatures up to 100 K, and even greater isotope selectivity for an extended range of temperatures, up to 300 K. This isotope selectivity is consistent with recent experimental data, which exhibit a large difference between the isosteric heats of and adsorbed in these bundles.
Keywords
This publication has 46 references indexed in Scilit:
- Hindered rotation of H2 adsorbed interstitially in nanotube bundlesThe Journal of Chemical Physics, 2002
- Single Crystals of Single-Walled Carbon Nanotubes Formed by Self-AssemblyScience, 2001
- Helium in One-Dimensional Nanopores: Free Dispersion, Localization, and Commensurate/Incommensurate Transitions with Nonrigid OrbitalsPhysical Review Letters, 2001
- Size Selectivity of Narrow PoresPhysical Review Letters, 2000
- Determination of the binding energy of methane on single-walled carbon nanotube bundlesPhysical Review B, 2000
- Molecular simulation of hydrogen adsorption in charged single-walled carbon nanotubesThe Journal of Chemical Physics, 1999
- Adsorption of Nitrogen in Carbon Nanotube ArraysLangmuir, 1999
- High H 2 Uptake by Alkali-Doped Carbon Nanotubes Under Ambient Pressure and Moderate TemperaturesScience, 1999
- Hydrogen adsorption and cohesive energy of single-walled carbon nanotubesApplied Physics Letters, 1999
- Laser isotope separationContemporary Physics, 1990