Eur. Phys. J. AP
Volume 21, Number 3, March 2003
|Page(s)||195 - 202|
|Section||Nanomaterials and Nanotechnologies|
|Published online||27 February 2003|
Nano- and microcrystalline particles of palladium formed on hydrogen-bombarded palladium surfaces; their structure and formation kinetics
Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku,
Nagoya 466-8555, Japan
Corresponding author: firstname.lastname@example.org
Revised: 11 July 2002
Accepted: 7 November 2002
Published online: 27 February 2003
Crystalline particles of palladium are known to form on polycrystalline Pd interacting with low-energy hydrogen ions. These particles disperse on the glassy medium called the “matrix". The particles were recently confirmed by transmission electron microscopy to be classified into two groups: the particles emerging from the projectile-implanted subsurface together with the outflowing matrix and those newly produced on the hydrogen-bombarded matrix. The latter type of particles was nucleated as a crystalline cluster on the disordered substrate, and then underwent three-dimensional growth into a nanocrystal under the bombard- ment of showering hydrogen ions. Some particles presented a bubble-like TEM contrast, independently of their growth history. Such particles were chestnut-like in structure, with a hard shell wrapping the less-dense interior, and their formation may be attributed to a chemical process occurring within the particles.
PACS: 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 61.80.Jh – Ion radiation effects
© EDP Sciences, 2003
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