Nanoscale effects on the stability of the λ-Ti3O5 polymorph.
Chem Asian J
; 6(7): 1886-90, 2011 Jul 04.
Article
en En
| MEDLINE
| ID: mdl-21538906
ABSTRACT
The nanocrystalline valency-delocalized λ-phase of the binary oxide Ti(3)O(5) has recently emerged as a promising phase-change material that exhibits rapid photo-reversible optical and resistance changes at ambient temperature. Nanoscaling caused the monoclinic-λ to monoclinic charge-ordered ß-phase structural instability to shift to considerably lower temperatures compared to the bulk material, and led to a broad thermal hysteresis. The structural transformation was accompanied by a large change in volume and large lattice relaxations, which imply the presence of strong electron-phonon coupling. We attribute the suppression of the phase transition to the enhanced surface energy on the nanoscale.
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Colección:
01-internacional
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MEDLINE
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En
Revista:
Chem Asian J
Año:
2011
Tipo del documento:
Article
País de afiliación:
Japón