Nano Archive

Effect of nanoparticle nature on hydrogen concentration profiles and improved switching characteristics in Gd switchable mirrors

Aruna, I and Mehta, B. R and Malhotra, L. K. and Khan, S. A. and Avasthi, D. K. (2005) Effect of nanoparticle nature on hydrogen concentration profiles and improved switching characteristics in Gd switchable mirrors. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 5 (10). 1728-1733(6). ISSN 1533-4880

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Abstract

A detailed elastic recoil detection analysis using 40 MeV 28Si5+ ions has been carried out to study the changes in the H concentration and concentration profiles during the hydrogenation/dehydrogenation process in polycrystalline and nanoparticle Gd layers formed using vacuum evaporation and inert gas evaporation techniques, respectively. Nanoparticle sample exhibits a larger difference in the [H]/[Gd] values (2.9 and 1.7) in comparison to polycrystalline sample (2.4 and 2.0) in the loaded and deloaded states. Hydrogenation/dehydrogenation activity is restricted to the top portion in case of polycrystalline sample. In contrast to this, size induced structural transformation; enhanced surface area and the presence of large number of inter particle boundaries due to nanoparticle character result in the complete Gd layer becoming active during switching.

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:5063
Deposited By:JNCASR
Deposited On:27 May 2009 10:22
Last Modified:27 May 2009 10:22

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