Enhanced selectivity of target gas molecules through a minimal array of gas sensors based on nanoparticle-decorated SWCNTs.

Freddi S., Pagliara S., Drera G., Goldoni A., Sangaletti L.

Comunicazione
VI - Fisica applicata, acceleratori e beni culturali
Aula 29C-2 - Martedì 18 h 09:00 - 13:00
An array of gas sensors based on carbon nanotubes decorated with metal oxide nanoparticles has been produced to explore applications in the field of breathonomics. The array is exposed to different target gas molecules, that can be mostly related to specific diseases, and the data are analyzed with the principal component analysis (PCA) approach. The results show that this sensors array can efficiently detect different gas molecules (such as NO$_2$, NH$_3$, H$_2$S, acetone, benzene, ethanol...) with molecule-related PCA patterns well separated from one another. This selectivity is further increased when humidity is taken into account during the PCA analysis.