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Title: Photonic gas sensors exploiting directly the optical properties of hybrid carbon nanotube localized surface plasmon structures
Authors: Allsop, Thomas 
Arif, Raz 
Neal, Ron 
Kalli, Kyriacos 
Kundrát, Vojtěch 
Rozhin, Aleksey 
Culverhouse, Phil 
Webb, David J 
Keywords: Carbon nanotubes;Gas sensors;Localized surface plasmons;Optical sensing
Category: Nano-Technology
Field: Engineering and Technology
Issue Date: 26-Feb-2016
Publisher: Nature Publishing Group
Source: Light: Science & Applications, 2016, vol. 5, article no. e16036
DOI: 10.1038/lsa.2016.36
Journal: Light: Science & Applications 
Abstract: We investigate the modification of the optical properties of carbon nanotubes (CNTs) resulting fromachemical reaction triggeredbythe presence of a specific compound (gaseous carbon dioxide (CO2)) and show this mechanism has important consequences for chemical sensing. CNTs have attracted significant research interest because they can be functionalized for a particular chemical, yielding a specific physical response which suggests many potential applications in the fields of nanotechnology and sensing. So far, however, utilizing their optical properties for this purpose has proven to be challenging. We demonstrate the use of localized surface plasmons generated on a nanostructured thin film, resembling a large array ofnano-wires, to detect changesin the optical properties of the CNTs. Chemical selectivity is demonstrated using CO2 in gaseous form at room temperature. The demonstrated methodology results additionally in a new, electrically passive, optical sensing configuration that opens up the possibilities of using CNTs as sensors in hazardous/explosive environments.
ISSN: 2047-7538
DOI: 10.1038/lsa.2016.36
Rights: © 2016 CIOMP. All rights reserved
Type: Article
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