Order-disorder phase change in embedded Si nanoparticles
| Autor: | Luciano Colombo, Simone Meloni, Sergio Orlandini |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Phase transition
Materials science Condensed Matter - Mesoscale and Nanoscale Physics Statistical Mechanics (cond-mat.stat-mech) FOS: Physical sciences Nanoparticle Nanotechnology Condensed Matter Physics eye diseases Relative stability NO Electronic Optical and Magnetic Materials Amorphous solid Core (optical fiber) Phase change Order (biology) Nanocrystal Chemical physics Electronic Optical and Magnetic Materials Mesoscale and Nanoscale Physics (cond-mat.mes-hall) sense organs Condensed Matter - Statistical Mechanics |
| Zdroj: | Physical Review B. 83 |
| ISSN: | 1550-235X 1098-0121 |
| Popis: | We investigated the relative stability of the amorphous vs crystalline nanoparticles of size ranging between 0.8 and 1.8 nm. We found that, at variance from bulk systems, at low T small nanoparticles are amorphous and they undergo to an amorphous-to-crystalline phase transition at high T. On the contrary, large nanoparticles recover the bulk-like behavior: crystalline at low T and amorphous at high T. We also investigated the structure of crystalline nanoparticles, providing evidence that they are formed by an ordered core surrounded by a disordered periphery. Furthermore, we also provide evidence that the details of the structure of the crystalline core depend on the size of the nanoparticle Comment: 8 pages, 5 figures |
| Databáze: | OpenAIRE |
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