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2021-09-22 - Colloque/Présentation - communication orale - Anglais - 2 page(s)

Luo Yifan , Ly Ahmadou, Lahem Driss, Zhang Chao, Debliquy Marc , "Role of cobalt in Co-ZnO nanoflower gas sensors for the detection of low concentration VOCs" in 7th International Conference on Sensors and Electronic Instrumentation Advances (SEIA' 2021), Palma de Mallorca, Espange, 2021

  • Codes CREF : Généralités (DI0000)
  • Unités de recherche UMONS : Science des Matériaux (F502)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) As a non-invasive detection method, breath analysis for the diagnosis of lung cancer has been a hotspot in the medical field. Using an e-nose to achieve the breath analysis is a popular choice. To prepare the sensors used in the e-nose for the detection of the volatile organic compounds which are considered as the biomarkers for lung cancers, cobalt doped ZnO sensors with high response to low concentration VOCs were fabricated. The Co-ZnO samples were synthesized via wet chemical method and drop coated onto the alumina substrates equipped with gold interdigitated electrodes after calcination. The as-synthesized materials were characterized by SEM, XRD, FT-IR and XPS to observe the microstructure, the crystal phase and the states of Co atom in the samples. The sensors were tested with various VOCs at different temperatures. showing a strong influence of the different amounts of Co2+ addition on the sensing characteristics. The difference in the sensing performance could be explained by the different phases of Co in the sensing layers.