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Article Dans Une Revue MRS Online Proceedings Library Année : 2011

Gas Adsorption Evidence of Single-Wall and Multi-Wall Carbon Nanotube Opening

Résumé

ABSTRACT Carbon nanotubes offer a surface very similar to that of graphite, a reference substrate in physisorption experiments aimed at studying substrate-adsorbate interactions. The curvature, however, introduces new questions. What are the effects of this on condensation pressures or heats of adsorption? Can one experimentally distinguish between different adsorption sites? In this study, we compare adsorption isotherms of several simple gases (Kr, Xe, CCl 4 ) on singlewall (SWNTs) and multi-wall carbon nanotubes (MWNTs), before and after opening. For mechanically opened SWNTs, the accessibility of the adsorption sites and the molecular arrangements of the adsorbed gases are discussed. With the much bigger, well-defined MWNTs, the “cutting method” called upon a nitric acid treatment followed by a CO 2 oxidation. TEM investigations and physisorption studies clearly revealed tube opening and that the inner channels became accessible to Kr molecules.
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Dates et versions

hal-03313565 , version 1 (06-05-2023)

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Moulay-Rachid Babaa, Edward Mcrae, Nicole Dupont-Pavlovsky, Sandrine Delpeux, Francois Beguin, et al.. Gas Adsorption Evidence of Single-Wall and Multi-Wall Carbon Nanotube Opening. MRS Online Proceedings Library, 2011, 782 (A9.5), ⟨10.1557/PROC-782-A9.5⟩. ⟨hal-03313565⟩
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