Abstract
The nanocrystalline valency-delocalized λ-phase of the binary oxide Ti3O5 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 β-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.
Original language | English |
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Pages (from-to) | 1886-1890 |
Number of pages | 5 |
Journal | Chemistry - An Asian Journal |
Volume | 6 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2011 Jul 4 |
Keywords
- hysteresis
- nanoscale effects
- polymorphism
- structural transitions
- x-ray diffraction
ASJC Scopus subject areas
- Biochemistry
- Organic Chemistry