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Keywords:

  • ab initio calculations;
  • electron microscopy;
  • metal oxides;
  • phase transitions;
  • surface chemistry
Thumbnail image of graphical abstract

Bistable surface: The reversible phase transition between wurtzite (WZ) and body-centered-tetragonal (BCT) lattice was activated in ZnO(10equation image0) surfaces and directly imaged at atomic scale by using aberration-corrected electron microscopy (see picture). A nucleation-growth mechanism for the surface reconstruction is further proposed based on observations and calculations of the WZ–BCT domain boundary.