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Novel resistive gas sensors based on single-walled carbon nanotubes (SWNTs) as an active sensing element have been evaluated for hydrogen detection. Sensor films were fabricated by airbrushing SWNT dispersions on alumina substrates. The employed SWNT materials were either chemically functionalized with Pd or sputtered with Pd to enhance their sensitivity to hydrogen. Sensors were characterized by...
In this work we present a sensor based in a Bragg grating coated by a small amount of palladium. We explain the process of fabrication in detail, from the etching of the fiber to the deposition of the palladium. In this sensor the amount of hydrogen absorbed by the Pd is hydrogen concentration dependant and causes a stress that alters the transmission or reflection spectra of the FBG.
Single-walled carbon nanotubes (SWNTs) produced by arc-discharge have been researched as resistive gas sensors for H 2 detection. Raw as well as modified single-walled carbon nanotubes were utilised as sensor material. Two types of modification treatments were carried out on the as grown SWNT material; chemical functionalization with palladium and doping with palladium by sputtering.CNTs were...
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