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

I. Aruna, B. R. Mehta, L. K. Malhotra, S. A. Khan, D. K. Avasthi

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 languageEnglish
Pages (from-to)1728-1733
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume5
Issue number10
DOIs
Publication statusPublished - 31 Oct 2005

Keywords

  • ERDA
  • Gd nanoparticles
  • hydrogen concentration
  • switchable mirror

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