Photonic gas sensors exploiting directly the optical properties of hybrid carbon nanotube localized surface plasmon structures

Light, Science & Applications
Thomas AllsopDavid J Webb

Abstract

We investigate the modification of the optical properties of carbon nanotubes (CNTs) resulting from a chemical reaction triggered by the 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 of nano-wires, to detect changes in 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.

References

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Citations

Nov 12, 2016·Nature Communications·Christophe CaucheteurJacques Albert
Sep 13, 2019·Optics Express·Jinbo GaoZhuo Zhang
Aug 10, 2017·Optics Express·Guangcan MiVien Van
Jan 13, 2018·Optics Letters·Georgios ViolakisStavros Pissadakis
Aug 16, 2019·Sensors·Banshi D GuptaVivek Semwal
Nov 14, 2019·Sensors·Thomas Allsop, Ron Neal
Nov 19, 2020·Nanomaterials·Marwan Y RezkManas Ranjan Gartia

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Methods Mentioned

BETA
X-ray
surface plasmon resonance
surface plasmon resonances

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