Effect of UV-Light Illumination on Room Temperature ZnO Nanotubes for Ethanol Gas Sensing

Authors

  • B. Ydir LETSMP, Department of Physics, Faculty of Science, Université Ibn Zohr, Agadir 80000
  • O. Boualiouaat LETSMP, Department of Physics, Faculty of Science, Université Ibn Zohr, Agadir 80000
  • H. Lahlou LETSMP, Department of Physics, Faculty of Science, Université Ibn Zohr, Agadir 80000
  • M. Bousseta LETSMP, Department of Physics, Faculty of Science, Université Ibn Zohr, Agadir 80000
  • Es-Said Akhouayri LETSMP, Department of Physics, Faculty of Science, Université Ibn Zohr, Agadir 80000
  • V. Fierro N2EV, Department of Nanomaterials, Electronics and Vivant-Institut Jean Lamour, UMR 7198 CNRS-UL, Epinal
  • A. Celzard N2EV, Department of Nanomaterials, Electronics and Vivant-Institut Jean Lamour, UMR 7198 CNRS-UL, Epinal
  • D. Prades Department of Electronic and Biomedical Engineering, University of Barcelona, Barcelona

DOI:

https://doi.org/10.26713/jamcnp.v7i3.1541

Keywords:

Forcespinning, ZnO, Nanotubes, Ethanol, Gas sensor, UV-light activation, Room temperature

Abstract

A gas sensor based on force spun ZnO nanotubes was successfully developed by using a simple and cost-effective approach, as confirmed by SEM, EDS, TGA-DTG and XRD characterization techniques. In order to optimize the sensing performance of the device in terms of sensing response kinetics and stability, the sensor response behavior against ethanol vapor was investigated under dark and UV light. Different reported studies have demonstrated that the resistance of ZnO gas sensors towards ethanol decreases when it is exposed to UV light. In this work, the UV light illumination of the sensor at 370 nm, allowed effectively to activate the detection of ethanol at the ppm level at room-temperature, in contrast to dark conditions. Unexpectedly, it was observed that the resistance behavior of the prepared ZnO sensor was reversed under continuous UV irradiation. The sensing mechanism behind this change is being also discussed.

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Published

2020-12-31
CITATION

How to Cite

Ydir, B., Boualiouaat, O., Lahlou, H., Bousseta, M., Akhouayri, E.-S., Fierro, V., Celzard, A., & Prades, D. (2020). Effect of UV-Light Illumination on Room Temperature ZnO Nanotubes for Ethanol Gas Sensing. Journal of Atomic, Molecular, Condensed Matter and Nano Physics, 7(3), 155–165. https://doi.org/10.26713/jamcnp.v7i3.1541

Issue

Vol. 7 No. 3 (2020)

Section

Research Article

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