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Issue 15, 2014
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Ultrasensitive single crystalline TeO2 nanowire based hydrogen gas sensors

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Abstract

We report a high performance tellurium dioxide (TeO2) nanowire (NW)-based hydrogen gas sensor fabricated by standard photolithography. High-quality single crystalline TeO2 NWs were synthesized using gold as a catalyst with high reproducibility. The resulting NW diameters were as small as 30 nm. The gas sensing properties were investigated at various temperatures at two different H2 concentrations (0.5% and 1%). We observed ΔR/R responses of 28% and 57% at 25 °C and 140 °C, respectively. Furthermore, detailed sensitivity-versus-temperature analysis shows that sensitivity of up to 138% can be obtained at 140 °C for 1% H2 concentration.

Graphical abstract: Ultrasensitive single crystalline TeO2 nanowire based hydrogen gas sensors

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Publication details

The article was received on 09 Jan 2014, accepted on 24 Jan 2014 and first published on 24 Jan 2014


Article type: Paper
DOI: 10.1039/C4TA00135D
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2014,2, 5394-5398
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    Ultrasensitive single crystalline TeO2 nanowire based hydrogen gas sensors

    C. Yan, B. Huy Le and D. J. Kang, J. Mater. Chem. A, 2014, 2, 5394
    DOI: 10.1039/C4TA00135D

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