Nanoscale effects on the stability of the λ-Ti3O 5 polymorph

Rie Makiura, Yasuhiro Takabayashi, Andrew N. Fitch, Hiroko Tokoro, Shin Ichi Ohkoshi, Kosmas Prassides

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


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 languageEnglish
Pages (from-to)1886-1890
Number of pages5
JournalChemistry - An Asian Journal
Issue number7
Publication statusPublished - 2011 Jul 4


  • hysteresis
  • nanoscale effects
  • polymorphism
  • structural transitions
  • x-ray diffraction

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry


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