Nonuniform growth of embedded silicon nanocrystals in an amorphous matrix (Articolo in rivista)

Type
Label
  • Nonuniform growth of embedded silicon nanocrystals in an amorphous matrix (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Mattoni, A; Colombo, L (2007)
    Nonuniform growth of embedded silicon nanocrystals in an amorphous matrix
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mattoni, A; Colombo, L (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 99 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Cagliari, Dept Phys, Sardinian Lab Comp Mat Sci, INFM CNR, I-09042 Monserrato, Italy (literal)
Titolo
  • Nonuniform growth of embedded silicon nanocrystals in an amorphous matrix (literal)
Abstract
  • The phase transformation of a metastable system occurs when islands of a second stable phase form and grow. The growth velocity of the islands controls the kinetics of the phase transformation. In this work we consider the amorphous-to-crystalline transformation in silicon as the prototype of a solid-to-solid transformation. The results of atomistic simulations are fit using an analytic model for the growth of [100]-oriented nanosized crystalline fibers embedded into an amorphous matrix. We demonstrate that the radius of the island does not grow, in general, at constant velocity. On the contrary, we identify a decelerated motion that is due to anisotropic effects of the crystal grain. Such a nonuniform growth should be taken into account in the modeling of solid-to-solid crystallization. (literal)
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