Si OCN  Functionalized Carbon Nanotube Gas Sensors for Elevated Temperature Applications | Zendy

Karakuscu Aylin | Zendy; Hu LungHao | Zendy; Ponzoni Andrea | Zendy; Baratto Camilla | Zendy; Ceccato Riccardo | Zendy; Sberveglieri Giorgio | Zendy; Raj Rishi | Zendy

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Si OCN Functionalized Carbon Nanotube Gas Sensors for Elevated Temperature Applications

Author(s) -

Karakuscu Aylin,

Hu LungHao,

Ponzoni Andrea,

Baratto Camilla,

Ceccato Riccardo,

Sberveglieri Giorgio,

Raj Rishi

Publication year - 2015

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/jace.13396

Subject(s) - surface modification , carbon nanotube , materials science , conductance , chemical engineering , silicon , coating , ceramic , nanotechnology , conductivity , chemistry , composite material , optoelectronics , engineering , mathematics , combinatorics

Silicon Oxycarbonitride (Si OCN ) 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 CNT s without requiring any surface modification and a thin layer of semiconductor ceramic Si OCN is created on the CNT s after heat treatment. This new kind of conductometric gas sensors can detect 10 ppm NH 3 and 2 ppm NO 2 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 Si OCN 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.

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