Gas adsorption evidence of single-wall and multi-wall carbon nanotube opening

Moulay Rachid Babaa; Edward McRae; Nicole Dupont-Pavlovsky; Sandrine Delpeux; Francois Beguin; Fabrice Valsaque; Jaafar Ghanbaja

doi:10.1557/proc-782-a9.5

Gas adsorption evidence of single-wall and multi-wall carbon nanotube opening

Moulay Rachid Babaa, Edward McRae, Nicole Dupont-Pavlovsky, Sandrine Delpeux, Francois Beguin, Fabrice Valsaque, Jaafar Ghanbaja

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

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, CCl₄ on single-wall (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 CO₂ oxidation. TEM investigations and physisorption studies clearly revealed tube opening and that the inner channels became accessible to Kr molecules.

Original language	English
Pages (from-to)	421-426
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	782
DOIs	https://doi.org/10.1557/proc-782-a9.5
Publication status	Published - 2003
Externally published	Yes
Event	Micro- and Nanosystems - Boston, MA, United States Duration: Dec 1 2003 → Dec 3 2003

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/proc-782-a9.5

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title = "Gas adsorption evidence of single-wall and multi-wall carbon nanotube opening",

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, CCl4 on single-wall (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 CO2 oxidation. TEM investigations and physisorption studies clearly revealed tube opening and that the inner channels became accessible to Kr molecules.",

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T1 - Gas adsorption evidence of single-wall and multi-wall carbon nanotube opening

AU - Babaa, Moulay Rachid

AU - McRae, Edward

AU - Dupont-Pavlovsky, Nicole

AU - Delpeux, Sandrine

AU - Beguin, Francois

AU - Valsaque, Fabrice

AU - Ghanbaja, Jaafar

PY - 2003

Y1 - 2003

N2 - 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, CCl4 on single-wall (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 CO2 oxidation. TEM investigations and physisorption studies clearly revealed tube opening and that the inner channels became accessible to Kr molecules.

AB - 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, CCl4 on single-wall (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 CO2 oxidation. TEM investigations and physisorption studies clearly revealed tube opening and that the inner channels became accessible to Kr molecules.

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JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Micro- and Nanosystems

Y2 - 1 December 2003 through 3 December 2003

ER -

Gas adsorption evidence of single-wall and multi-wall carbon nanotube opening

Abstract

ASJC Scopus subject areas

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