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@ARTICLE{Lu:909556,
      author       = {Lu, Yan and Zheng, Fengshan and Lan, Qianqian and
                      Schnedler, Michael and Ebert, Philipp and Dunin-Borkowski,
                      Rafal E.},
      title        = {{C}ounting {P}oint {D}efects at {N}anoparticle {S}urfaces
                      by {E}lectron {H}olography},
      journal      = {Nano letters},
      volume       = {22},
      number       = {17},
      issn         = {1530-6984},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {FZJ-2022-03245},
      pages        = {6936–6941},
      year         = {2022},
      abstract     = {Metal oxide nanoparticles exhibit outstanding catalytic
                      properties, believed to be related to the presence of oxygen
                      vacancies at the particle’s surface. However, little
                      quantitative information is known about concentrations of
                      point defects inside and at surfaces of these nanoparticles,
                      due to the challenges in achieving an atomically resolved
                      experimental access. By employing off-axis electron
                      holography, we demonstrate, using MgO nanoparticles as an
                      example, a methodology that discriminates between mobile
                      charge induced by electron beam irradiation and immobile
                      charge associated with deep traps induced by point defects
                      as well as distinguishes between bulk and surface point
                      defects. Counting the immobile charge provides a
                      quantification of the concentration of F2+ centers induced
                      by oxygen vacancies at the MgO nanocube surfaces.},
      cin          = {ER-C-1},
      ddc          = {660},
      cid          = {I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {5351 - Platform for Correlative, In Situ and Operando
                      Characterization (POF4-535) / SIMDALEE2 - Sources,
                      Interaction with Matter, Detection and Analysis ofLow Energy
                      Electrons 2 (606988) / Q-SORT - QUANTUM SORTER (766970)},
      pid          = {G:(DE-HGF)POF4-5351 / G:(EU-Grant)606988 /
                      G:(EU-Grant)766970},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {36041122},
      UT           = {WOS:000855232100001},
      doi          = {10.1021/acs.nanolett.2c01510},
      url          = {https://juser.fz-juelich.de/record/909556},
}