Oriented graphitic carbon films for hydrogen gas sensors
Moafi, A., Shafiei, M., Sadek, A.Z., Lau, D.W.M., Partridge, J.G., Kalantar-zadeh, K., Wlodarski, W., & McCulloch, D.G. (2010) Oriented graphitic carbon films for hydrogen gas sensors. In Kenny, Thomas & Fedder, Gary (Eds.) 9th IEEE Conference on SENSORS proceedings, IEEE, Kona, Hawaii, pp. 378-381.
An oriented graphitic nanostructured carbon film has been employed as a conductometric hydrogen gas sensor. The carbon film was energetically deposited using a filtered cathodic vacuum arc with a -75 V bias applied to a stainless steel grid placed 1cm from the surface of the Si substrate. The substrate was heated to 400°C prior to deposition. Electron microscopy showed evidence that the film consisted largely of vertically oriented graphitic sheets and had a density of 2.06 g/cm3. 76% of the atoms were bonded in sp2 or graphitic configurations. A change in the device resistance of >; 1.5% was exhibited upon exposure to 1 % hydrogen gas (in synthetic, zero humidity air) at 100°C. The time for the sensor resistance to increase by 1.5 % under these conditions was approximately 60 s and the baseline (zero hydrogen exposure) resistance remained constant to within 0.01% during and after the hydrogen exposures.
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|Item Type:||Conference Paper|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100) > Sensor Technology (Chemical aspects) (030107)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanomaterials (100708)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanoscale Characterisation (100712)
|Divisions:||Current > QUT Faculties and Divisions > Science & Engineering Faculty|
|Deposited On:||01 May 2013 22:49|
|Last Modified:||12 Jul 2013 03:11|
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