Activities such as migration, rotation and revolution, and the bonding behavior of aluminum nanoparticles by electron irradiation have been investigated using a high-resolution transmission electron microscope on a stage at room temperature. It was determined that the driving force of the migration, rotation and revolution of the Al nanoparticles was a momentum transfer from spirally trajected electrons and ions inside the pole piece of transmission electron microscope. First, adjacent Al nanoparticles came into contact and bonded via necking between the Al/Al grain boundaries and the twin boundaries migrated to the nanoparticle surface. Finally, these boundaries disappeared, giving rise to a single particle or a single crystal. The driving forces for bonding were the surface energy of the nanoparticles and surface activation by momentum transferred from the high-energy electrons and ions. It is also clear that heating induced by electron irradiation is not a major factor controlling Al nanoparticle activities or the bonding process.
|Number of pages||4|
|Publication status||Published - 1999 Jan 1|
|Event||Proceedings of the 1998 4th International Conference on Nanostructured Materials (NANO '98) - Stockholm, Swed|
Duration: 1998 Jun 14 → 1998 Jun 19
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics