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Chlorinated holey double-walled carbon nanotubes for relative humidity sensor

Bulusheva, Lyubov G. and Sysoev, Vitalii I. and Lobiak, Egor V. and Fedoseeva, Yu. V. and Makarova, Anna A. and Dubois, Marc and Flahaut, Emmanuel and Okotrub, Aleksander V. Chlorinated holey double-walled carbon nanotubes for relative humidity sensor. (2019) Carbon, 148. 413-420. ISSN 0008-6223

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Official URL: https://doi.org/10.1016/j.carbon.2019.04.010

Abstract

A chemical procedure for modification of double-walled carbon nanotubes (DWCNTs) to enhance their response to humidity was developed. The DWCNTs walls were etched by hot concentrated sulfuric acid, after what the edge carbon sites were saturated by chlorine via reaction with CCl4 vapor. This treatment increases the dispersibility of DWCNTs in solvents, removes oxygen groups, and produces chlorine-decorated holes in the outer walls. Networks of chlorinated holey DWCNTs showed a high repeatable response to humid environment and a good reversible behavior after the sensor purging by dry air. The density functional theory calculations predict enhanced polarization of the DWCNTs when they contain chlorine-decorated holes in the outer walls and physisorption of H2O molecules near chlorine atoms. These two effects are the cause of an intense low-noise signal to gaseous H2O and easy sensor recovery.

Item Type:Article
HAL Id:hal-02181559
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Novosibirsk State University (RUSSIA)
Other partners > Université Clermont Auvergne - UCA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > SIGMA Clermont (FRANCE)
Other partners > Technische Universität Dresden - TUD (GERMANY)
Laboratory name:
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Deposited By: cirimat webmestre
Deposited On:12 Jul 2019 09:06

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