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Detection of nitrous oxide using infrared optical plasmonics coupled with carbon nanotubes

Allsop, Thomas; Al Araimi, Mohammed; Neal, Ron; Wang, Changle; Culverhouse, Phil; Ania-Castañón, Juan D.; Webb, David J.; Davey, Paul; Gilbert, James M.; Rozhin, Alex


Thomas Allsop

Mohammed Al Araimi

Ron Neal

Changle Wang

Phil Culverhouse

Juan D. Ania-Castañón

David J. Webb

Paul Davey

Alex Rozhin


© The Royal Society of Chemistry 2020. Interest in gas sensing using functionalised carbon nanotubes is a major area of research that utilises changes in their electrical properties induced by the reaction with a specific gas. This paper describes specific gas sensing on an optical platform consisting of a 2-dimensional nano-structured plasmonic array of nano-antennae/nanowires, with topological dimensions of mean radius of 130 nm, typical length of 20 μm and a period of 500 nm. The array is created by the spatial compaction of germanium oxides when the material interacts with ultra-violet irradiance, it can support infra-red localised surface plasmons. Carbon nanotubes are deposited upon the surface of the plasmonic platform followed by the application of the polyethyleneimine polymer. The resulting nanomaterials-photonic platform gives rise to the selective response to nitrous oxide gases, which are a major contributor to atmospheric degradation. We achieve the device sensitivity up to 100% atmosphere of nitrous oxide with a detection limit of 109 ppm, a maxiumum response time of nineteen seconds and yielding a full-scale deflection of +5.7 nm. This work demonstrates that the optical properties of specific carbon nanotubes can be used in a wide range of sensing applications offering a new sensing paradigm.


Allsop, T., Al Araimi, M., Neal, R., Wang, C., Culverhouse, P., Ania-Castañón, J. D., …Rozhin, A. (2020). Detection of nitrous oxide using infrared optical plasmonics coupled with carbon nanotubes. Nanoscale advances, 2(10), 4615-4626.

Journal Article Type Article
Acceptance Date Sep 12, 2020
Online Publication Date Sep 16, 2020
Publication Date Oct 1, 2020
Deposit Date Apr 1, 2022
Publicly Available Date Apr 4, 2022
Journal Nanoscale Advances
Electronic ISSN 2516-0230
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 2
Issue 10
Pages 4615-4626
Public URL


Published article (840 Kb)

Copyright Statement
This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.

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