Mayoral, Alvaro and Barron, Hector and Estrada-Salas, Ruben and Vazquez-Duran, Alma and José-Yacamán, Miguel (2009) Nanoparticle stability from the nano to the meso interval. nanoscale .
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Nanoparticles are the cornerstone of nanotechnology. Their crystal structure and relation to shape are still open problems despite a lot of advances in the field. The classical theory of nanoparticle stability predicts that for sizes <1.5–2 nm the icosahedral structure should be the most stable, then between around 2–5 nm, the decahedral shape should be the most stable. Beyond that, face-centered-cubic (FCC) structures will be the predominant phase. However, in the experimental side, icosahedral (Ih) and decahedral (Dh) particles can be observed much beyond the 5 nm limit. In fact, it is possible to find Ih and Dh particles even in the mesoscopic range. Conversely, it is possible to find FCC particles with a size <1.5 nm. In this paper we review a number of the mechanisms proposed in the literature that allow the stabilization of nanoparticles. Some of the mechanisms are very interrelated and it becomes difficult to distinguish between them.
|Subjects:||Material Science > Nanochemistry|
|Deposited On:||03 Jan 2010 03:42|
|Last Modified:||03 Jan 2010 03:42|
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