SiOCN Functionalized Carbon Nanotube Gas Sensors for Elevated Temperature Applications. Issue 4 (26th December 2014)

• Record Type: Journal Article
• Authors: Karakuscu, Aylin; Hu, Lung‐Hao; Ponzoni, Andrea; Baratto, Camilla; Ceccato, Riccardo; Sberveglieri, Giorgio; Raj, Rishi; Riedel, R.
• Is Part Of: Journal of the American Ceramic Society. Volume 98:Issue 4(2015)
• Page Start: 1142
• Page End: 1149
• Publication Date: 2014-12-26
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13396
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace13396-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>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.</p> </abstract>