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A Room Temperature Gas Sensor Based on Sulfonated SWCNTs for the Detection of NO and NO(2)

The electrical response of sulfonated single-walled carbon nanotubes (SWCNTs) to NO and NO(2), for gas sensing applications, at room temperature, is reported in this work. A specific configuration based on SWCNT deposition between double pair configuration gold electrodes, supported on a substrate,...

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Detalles Bibliográficos
Autores principales: Ionete, Eusebiu Ilarian, Spiridon, Stefan Ionut, Monea, Bogdan Florian, Stratulat, Elena
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6427478/
https://www.ncbi.nlm.nih.gov/pubmed/30841610
http://dx.doi.org/10.3390/s19051116
Descripción
Sumario:The electrical response of sulfonated single-walled carbon nanotubes (SWCNTs) to NO and NO(2), for gas sensing applications, at room temperature, is reported in this work. A specific configuration based on SWCNT deposition between double pair configuration gold electrodes, supported on a substrate, was considered for the sensing device; employed characterization technique where FTIR and SEM. The experimental results showed a p-type response of the sulfonated SWCNTs, with decrease in resistance, under exposure to NO gas (40–200 ppb) and NO(2) (40–200 ppb). Also, the sensor responses to successive exposures at NO(2) 800 ppb together with investigation of long term stability, at 485 ppb for NO, are reported. The reaction mechanism in case of NO and NO(2) detection with sulfonated SWCNTs is presented.