Top: STM image showing surface defect patterns with varying periodicities (left) and a superimposed model of the two-dimensional Magnéli-type phase illustrating the ordered arrangement of a peculiar surface oxygen vacancy (right).
Top: STM image showing surface defect patterns with varying periodicities (left) and a superimposed model of the two-dimensional Magnéli-type phase illustrating the ordered arrangement of a peculiar surface oxygen vacancy (right). © The authors
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Jacek Goniakowski
Communication CNRS Physique
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A Nanoscale Twist: Discovery of 2D Magnéli Phases in MoO₃ Films

Résultat scientifique

At the nanoscale, MoO₃ no longer behaves like its bulk form: when "reduced," its structure reorganizes in unexpected ways. By studying an ultrathin bilayer with various experimental and theoretical techniques, the researchers show that it fragments into thinner layers that develop regular patterns of oxygen defects. These patterns form a fully two-dimensional version of the Magnéli phases, structures typically observed only in the bulk material, but which emerge here due to the high flexibility of the nanolayers.

The present study was carried out in the following CNRS laboratory:

  • L’Institut des NanoSciences de Paris (INSP, CNRS/Sorbonne Université)

References :

Two-Dimensional Defective MoO3–x Layers: Formation of a Magnéli-Type Nanophase, Jacek Goniakowski, Claudine Noguera, Falko P. Netzer, Svetlozar Surnev, ACS Nano 19 (38), 33913-33925 - Published 18 September 2025.
DOI : 10.1021/acsnano.5c09324
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Contact

Jacek Goniakowski
Chercheur du CNRS à l'Institut des nanosciences de Paris (INSP)
Communication CNRS Physique