Silicon Oxycarbonitride (SiOCN) functionalization is proposed for stable, reproducible, reliable, and enhanced gas‐sensing properties in carbon nanotube (CNT) gas sensors. The process is very simple: liquid precursor completely coats the surfaces of the CNTs without requiring any surface modification and a thin layer of semiconductor ceramic SiOCN is created on the CNTs after heat treatment. This new kind of conductometric gas sensors can detect 10 ppm NH3 and 2 ppm NO2 at temperatures up to 350°C. The stability of the functionalized CNT sensor is verified up to 520°C, while the CNT sensor without the SiOCN coating lost conductance after 250°C due to the structural modification. SiOCN functionalization of CNT changes the recovery from irreversible to reversible and the recovery time decreases from 60 min at 100°C to 19 min at 350°C.

SiOCN functionalized carbon nanotube gas sensors for elevated temperature applications / Karakuscu, Aylin; Hu, Lung-hao; Ponzoni, Andrea; Baratto, Camilla; Ceccato, Riccardo; Sberveglieri, Giorgio; Raj, Rishi. - In: JOURNAL OF THE AMERICAN CERAMIC SOCIETY. - ISSN 0002-7820. - STAMPA. - 2015, 98:4(2015), pp. 1142-1149. [10.1111/jace.13396]

SiOCN functionalized carbon nanotube gas sensors for elevated temperature applications

Karakuscu, Aylin;Hu, Lung-Hao;Ponzoni, Andrea;Ceccato, Riccardo;Raj, Rishi
2015-01-01

Abstract

Silicon Oxycarbonitride (SiOCN) functionalization is proposed for stable, reproducible, reliable, and enhanced gas‐sensing properties in carbon nanotube (CNT) gas sensors. The process is very simple: liquid precursor completely coats the surfaces of the CNTs without requiring any surface modification and a thin layer of semiconductor ceramic SiOCN is created on the CNTs after heat treatment. This new kind of conductometric gas sensors can detect 10 ppm NH3 and 2 ppm NO2 at temperatures up to 350°C. The stability of the functionalized CNT sensor is verified up to 520°C, while the CNT sensor without the SiOCN coating lost conductance after 250°C due to the structural modification. SiOCN functionalization of CNT changes the recovery from irreversible to reversible and the recovery time decreases from 60 min at 100°C to 19 min at 350°C.
2015
4
Karakuscu, Aylin; Hu, Lung-hao; Ponzoni, Andrea; Baratto, Camilla; Ceccato, Riccardo; Sberveglieri, Giorgio; Raj, Rishi
SiOCN functionalized carbon nanotube gas sensors for elevated temperature applications / Karakuscu, Aylin; Hu, Lung-hao; Ponzoni, Andrea; Baratto, Camilla; Ceccato, Riccardo; Sberveglieri, Giorgio; Raj, Rishi. - In: JOURNAL OF THE AMERICAN CERAMIC SOCIETY. - ISSN 0002-7820. - STAMPA. - 2015, 98:4(2015), pp. 1142-1149. [10.1111/jace.13396]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/197127
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