Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
64 (1988), S. 3706-3712
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Palladium-coated, single-mode optical fibers have been used to detect hydrogen in a concentration range 20 parts per billion to 2% in 1 atm of nitrogen. When the coated fibers are exposed to hydrogen, a hydride is formed with an expanded lattice constant, which stretches the optical fiber. This change in optical path length is measured using a Mach–Zehnder interferometer. A simple one-dimensional model is presented and shown to accurately reproduce the fiber response. Using electrodeposited palladium films, a factor of 7 enhancement in the hydrogen solubility is observed, as well as a deeply bound site which is saturated in the parts per million concentration range. The data suggest that this site may be due to hydrogen binding to a free surface of the palladium.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.341414
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