Vacancy coalescence during oxidation of iron nanoparticles.

Andreu Cabot,† Victor F. Puntes,‡ Elena Shevchenko,§ Yadong Yin,§,| Lluı́s Balcells,⊥ Matthew A. Marcus,¶ Steven M. Hughes,# and A. Paul Alivisatos*,†,§,# Materials Sciences DiVision, Molecular Foundry, and AdVanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Institut Català d’ Estudis i Recerca AVançat and Institut Catalá de Nanotecnologia, Bellaterra 08193, Barcelona, Spain, Institut de Ciència de Materials de Barcelona, (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain, and Department of Chemistry, UniVersity of California at Berkeley, Berkeley, California 94720