Chlorinated holey double-walled carbon nanotubes for relative humidity sensor - Archive ouverte HAL Access content directly
Journal Articles Carbon Year : 2019

Chlorinated holey double-walled carbon nanotubes for relative humidity sensor

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.
Fichier principal
Vignette du fichier
bulusheva_23693.pdf (1.49 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02181559 , version 1 (12-07-2019)

Identifiers

Cite

Lyubov G. Bulusheva, Vitalii I. Sysoev, Egor V. Lobiak, Yu. V. Fedoseeva, Anna A. Makarova, et al.. Chlorinated holey double-walled carbon nanotubes for relative humidity sensor. Carbon, 2019, 148, pp.413-420. ⟨10.1016/j.carbon.2019.04.010⟩. ⟨hal-02181559⟩
159 View
114 Download

Altmetric

Share

Gmail Facebook X LinkedIn More