Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Hydrogen Sensing"”.
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Palladium coated edge-emitting lasers for hydrogen sensing applications
… fuel sources are being actively pursued. Hydrogen shows considerable promise due to its virtually unlimited supply, energy conversion efficiency, and neutral impact on the environment. However, due to the flammability of hydrogen gas in concentrations as low as 4%, reliable sensors capable …
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Fiber optic hydrogen sensing utilizing facet etched palladium nano-apertures
… results for a new type of fiber optic hydrogen sensor based on facet etched nano-apertures in palladium films. Palladium is known to absorb hydrogen, resulting in a change in the optical and structural properties of the film which can be probed by measuring the transmission through the …
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Design and characterization of semiconductor laser structures for hydrogen sensing applications
… fuel sources are being actively pursued. Hydrogen shows considerable promise due to its virtually unlimited supply, energy conversion efficiency, and potentially neutral impact on the environment. However, due to the flammability of hydrogen gas in concentrations as low as 4% in air, …
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Formation of Porous Silicon Carbide and Its Suitability as a Chemical and Temperature Detector
… a measurable response to high concentrations of hydrogen gas (∼6% decrease in resistance when exposed to 20% H2) comparable to currently used platinum alloy resistive films. Current hydrogen sensing arrays may be improved by the introduction of a PSiC sensor for the specific role of high …
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Dissolved Gas Analysis of Insulating Transformer Oil Using Optical Fiber
… by attempting to improve sensor sensitivity for hydrogen and acetylene gasses. Of note is the fabrication of new hydrogen sensing fiber for operation around a larger absorption peak and also the improvement of the acetylene sensor's light source stability. Also detailed is the manufacturing of a …
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Fiber-Optic Sensors for Fully-Distributed Physical, Chemical and Biological Measurement
Distributed sensing is highly desirable in a wide range of civil, industrial and military applications. The current technologies for distributed sensing are mainly based on the detection of optical signals resulted from different elastic or non-elastic light-matter interactions including Rayleigh, …
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Metabolic and molecular responses to interspecies hydrogen transfer between Ruminococcus albus and Wolinella succinogenes
The mutually beneficial interdependence of hydrogen-producing and hydrogen-utilizing bacteria was discovered by M. P. Bryant, M. J. Wolin and R. S. Wolfe at the University of Illinois in 1967. Based on thermodynamic principles, interspecies hydrogen transfer is a central process in anaerobic …
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Synthesis, Fabrication and Surface Modification of Nanocrystalline Nickel Oxide for Electronic Gas Sensors
… was to synthesize and characterize the gas sensing behavior of nickel oxide metal oxide gas sensors. Thin films of nickel oxide synthesized by a sol-gel method have fine nanostructured grains with a high surface to volume ratio, which is beneficial for gas sensor applications. The effect of …