Abstract
We explored the potential of a carbon nanotube (CNT) coating working in
conjunction with a recently developed localized surface plasmon (LSP)
device (based upon a nanostructured thin film consisting of of
nano-wires of platinum) with ultra-high sensitivity to changes in the
surrounding index. The uncoated LSP sensor’s transmission resonances
exhibited a refractive index sensitivity of Δλ/Δn ~ -6200nm/RIU and
ΔΙ/Δn ~5900dB/RIU, which is the highest reported spectral sensitivity of
a fiber optic sensor to bulk index changes within the gas regime. The
complete device provides the first demonstration of the chemically
specific gas sensing capabilities of CNTs utilizing their optical
characteristics. This is proven by investigating the spectral response
of the sensor before and after the adhesion of CNTs to alkane gases
along with carbon dioxide. The device shows a distinctive spectral
response in the presence of gaseous CO2 over and above what
is expected from general changes in the bulk refractive index. This
fiber device yielded a limit of detection of 150ppm for CO2
at a pressure of one atmosphere. Additionally the adhered CNTs actually
reduce sensitivity of the device to changes in bulk refractive index of
the surrounding medium. The polarization properties of the LSP sensor
resonances are also investigated and it is shown that there is a
reduction in the overall azimuthal polarization after the CNTs are
applied. These optical devices offer a way of exploiting optically the
chemical selectivity of carbon nanotubes, thus providing the potential
for real-world applications in gas sensing in many inflammable and
explosive environments.
Original language | English |
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Title of host publication | Optical Sensing, Imaging, and Photon Counting: Nanostructured Devices and Applications |
Editors | Manijeh Razeghi, Dorota S. Temple, Gail J. Brown |
Place of Publication | Bellingham, WA (US) |
Publisher | SPIE |
Number of pages | 7 |
ISBN (Print) | 978-1-62841721-0 |
DOIs | |
Publication status | Published - 9 Aug 2015 |
Event | Optical Sensing, Imaging, and Photon Counting - San Diego, United States Duration: 11 Aug 2015 → 13 Aug 2015 |
Publication series
Name | SPIE Proceedings |
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Publisher | SPIE |
Volume | 9555 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 2410-9045 |
Conference
Conference | Optical Sensing, Imaging, and Photon Counting |
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Country/Territory | United States |
City | San Diego |
Period | 11/08/15 → 13/08/15 |
Bibliographical note
T. Allsop ; R. Arif ; R. Neal ; K. Kalli ; V. Kundrát ; A. Rozhin ; P. Culverhouse and D. J. Webb, "Localised surface plasmon fiber device coated with carbon nanotubes for the specific detection of CO(2)", Proc. SPIE 9555, Optical Sensing, Imaging, and Photon Counting: Nanostructured Devices and Applications, 95550S (August 28, 2015).Copyright 2015 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
DOI: http://dx.doi.org/10.1117/12.2187557
Funding: EPSRC (EP/J010413 and EP/J010391)
Keywords
- carbon nanotubes
- fiber optic sensors
- gas-sensing
- localized surface plasmons
- nanostructured thin film
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Localized surface plasmon fiber device coated with carbon nanotubes for the specific detection of CO2
Allsop, T. (Creator), Arif, R. (Creator), Neal, R. (Creator), Kalli, K. (Creator), Kundrát, V. (Creator), Rozhin, O. (Creator), Culverhouse, P. F. (Creator) & Webb, D. J. (Creator), Aston Data Explorer, 30 Aug 2015
DOI: 10.17036/9afa59de-f413-45b8-80a9-3f388731cb3f, https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9555/1/Localized-surface-plasmon-fiber-device-coated-with-carbon-nanotubes-for/10.1117/12.2187557.short?SSO=1
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