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Issue 32, 2015
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Micro-wheels composed of self-assembled tungsten oxide nanorods for highly sensitive detection of low level toxic chlorine gas

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Abstract

Micro-wheels about 7 μm average diameter and 2.5 μm thick were formed by the self-assembly of tungsten oxide nanorods about 1.5 μm long and 10 nm in diameter. The micro-wheels were hydrothermally synthesized for the ppt level monitoring of highly toxic chlorine (Cl2) gas. The gas sensor based on the fabricated micro-wheels showed excellent performance within a wide range of Cl2 concentrations (100 ppb to 500 ppb), having a high response of ∼10- to 25-fold. This sensor also had an ultra-low detection limit of ∼18 ppt, which was significantly lower than its permissive environmental concentration. In addition, the transient stability of the sensor even after five cycles of switching on/off from air-to-gas demonstrated effective reusability of the device.

Graphical abstract: Micro-wheels composed of self-assembled tungsten oxide nanorods for highly sensitive detection of low level toxic chlorine gas

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Publication details

The article was received on 16 Jan 2015, accepted on 05 Mar 2015 and first published on 05 Mar 2015


Article type: Communication
DOI: 10.1039/C5RA00916B
Author version available: Download Author version (PDF)
Citation: RSC Adv., 2015,5, 25204-25207
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    Micro-wheels composed of self-assembled tungsten oxide nanorods for highly sensitive detection of low level toxic chlorine gas

    P. Van Tong, N. D. Hoa, N. Van Duy and N. Van Hieu, RSC Adv., 2015, 5, 25204
    DOI: 10.1039/C5RA00916B

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