In-situ electron microscopy mapping of an order-disorder transition in a superionic conductor

Jaeyoung Heo, Daniel Dumett Torres, Progna Banerjee, Prashant K. Jain

Research output: Contribution to journalArticle

Abstract

Solid-solid phase transitions are processes ripe for the discovery of correlated atomic motion in crystals. Here, we monitor an order-disorder transition in real-time in nanoparticles of the super-ionic solid, Cu 2−x Se. The use of in-situ high-resolution transmission electron microscopy allows the spatiotemporal evolution of the phase transition within a single nanoparticle to be monitored at the atomic level. The high spatial resolution reveals that cation disorder is nucleated at low co-ordination, high energy sites of the nanoparticle where cationic vacancy layers intersect with surface facets. Time-dependent evolution of the reciprocal lattice of individual nanoparticles shows that the initiation of cation disorder is accompanied by a ~3% compression of the anionic lattice, establishing a correlation between these two structural features of the lattice. The spatiotemporal insights gained here advance understanding of order-disorder transitions, ionic structure and transport, and the role of nanoparticle surfaces in phase transitions.

Original languageEnglish (US)
Article number1505
JournalNature communications
Volume10
Issue number1
DOIs
StatePublished - Dec 1 2019

Fingerprint

Order disorder transitions
Nanoparticles
Electron microscopy
electron microscopy
Electron Microscopy
conductors
disorders
Phase Transition
nanoparticles
Phase transitions
Cations
cations
high resolution
High resolution transmission electron microscopy
Transmission Electron Microscopy
Vacancies
solid phases
flat surfaces
spatial resolution
transmission electron microscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

In-situ electron microscopy mapping of an order-disorder transition in a superionic conductor. / Heo, Jaeyoung; Dumett Torres, Daniel; Banerjee, Progna; Jain, Prashant K.

In: Nature communications, Vol. 10, No. 1, 1505, 01.12.2019.

Research output: Contribution to journalArticle

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