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Optical probes based on optical fibers and single-walled carbon nanotubes for hydrogen detection at cryogenic temperatures

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7 Author(s)
Cusano, A. ; Optoelectronic Division, Engineering Department, University of Sannio, 82100 Benevento, Italy ; Consales, M. ; Cutolo, A. ; Penza, M.
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In this letter, preliminary results on the feasibility to use optical fiber sensors coated by single-walled carbon nanotubes (SWCNTs)-based sensitive materials for hydrogen detection at cryogenic temperatures are presented. The optical probes have been realized by the Langmuir-Blodgett deposition of close-end and open-end SWCNTs on the distal end of standard optical fibers. The results obtained from hydrogen detection testing, carried out at a temperature as low as 113 K, demonstrate the excellent potentiality of the proposed configuration to sense very low percentages of gaseous hydrogen (≪5%), with good recovery and reversibility features as well as fast response times.

Published in:

Applied Physics Letters  (Volume:89 ,  Issue: 20 )

Date of Publication:

Nov 2006

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