Nano Archive

Structural, morphological and hydrogen sensing studies on pulsed laser deposited nanostructured palladium thin films

Kumar, M. Krishna and Rao, M. S. Ramachandra and Ramaprabhu, S. (2006) Structural, morphological and hydrogen sensing studies on pulsed laser deposited nanostructured palladium thin films. Journal of Physics D: Applied Physics, 39 (13). pp. 2791-2795.

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Official URL: http://iopscience.iop.org/0022-3727/39/13/023/?ejr...

Abstract

We have systematically investigated hydrogen sensing properties of pulsed laser deposited palladium thin films with reference to their crystallinity, surface morphology and film thickness. Thin films were deposited on clean quartz substrates at varying growth parameters. Structural and surface morphological characterizations have been carried out using X-ray diffraction, scanning electron microscopy and atomic force microscopy. Thin films with nanostructured surface morphology were achieved. Electrical resistance measurements, carried out in situ, by a two-probe technique in a chamber with a provision to introduce a known concentration of hydrogen gas and air, showed saturation on exposure to hydrogen gas. The change in electrical resistance due to hydrogen loading is found to be reversible. The sensor response time is typically 10–20 s. The Pd films are stable after several cycles of hydrogenation and dehydrogenation.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:5626
Deposited By:JNCASR
Deposited On:11 Aug 2009 07:20
Last Modified:11 Aug 2009 07:20

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