Abstract
A detailed elastic recoil detection analysis using 40 MeV 28Si 5+ 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.
Original language | English |
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Pages (from-to) | 1728-1733 |
Number of pages | 6 |
Journal | Journal of Nanoscience and Nanotechnology |
Volume | 5 |
Issue number | 10 |
DOIs | |
Publication status | Published - 31 Oct 2005 |
Keywords
- ERDA
- Gd nanoparticles
- hydrogen concentration
- switchable mirror