Journal
IEEE SENSORS JOURNAL
Volume 17, Issue 7, Pages 1964-1970Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2017.2656122
Keywords
Ammonia; carbon nanostructures; gas sensor; plasma treatment
Funding
- Ministry of Education, Youth and Sports of the Czech Republic [LQ1601]
- Erasmus Mundus [Action 2, Strand 1, Lot 4, Aurora2012C111]
- President of Russian Federation [MK-5360.2016.8]
- Ministry of Education and Science of the Russian Federation
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Sensors based on multi-walled carbon nanotubes were functionalized by oxygen plasma treatment and plasma co-polymerization of maleic anhydride and acetylene, obtaining core-shell carbon nanopartices covered by functional groups. The active nanostructured carbonaceous material was investigated by scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. It was confirmed that plasma treatment increases the content of surface functional groups. The sensing properties of the functionalized material were measured in the range of 10-1000 ppm of NH3 at room temperature. The plasma treated sensor showed an extremely high response of 22.5%, 27.9%, and 31.4% to 100 ppm, 250 ppm, and 500 ppm of NH3, respectively. It was shown that the nature of NH3 adsorption on the surface of functionalized nanostructured carbon material is physical adsorption.
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