Abstract
The oxidation properties of nanoparticles with core/alloy microstructure and stainless steel like interfaces is described. In particular, 15-nm Fe/FeCr nanoparticles with a stainless steel like interface are prepared. These particles show a unique morphological transformation that is induced by surface oxidation, oxide passivation, and vacancy coalescence. This Kirkendall diffusion results in a tailorable oxide layer thickness, Fe-core size, as well as void size and symmetry. Much like the interface of bulk stainless steel, the interfacial FeCr oxide passivates oxidation, resulting in self-limited diffusion. Because of this, a highly uniform and stable core-void-shell morphology is observed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 271-276 |
| Number of pages | 6 |
| Journal | Small |
| Volume | 10 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 29 2014 |
Keywords
- core-void-shell
- core/alloy
- kirkendall
- stainless
- vacancy coalescence
ASJC Scopus subject areas
- Biotechnology
- Biomaterials
- General Chemistry
- General Materials Science