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@ARTICLE{Caciuc:52209,
      author       = {Caciuc, V. and Hölscher, H. and Blügel, S. and Fuchs, H.},
      title        = {{A}tomic-scale sharpening of silicon tips in non-contact
                      atomic force microscopy},
      journal      = {Physical review letters},
      volume       = {96},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-52209},
      pages        = {016101},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The atomic-scale stability of clean silicon tips used in
                      noncontact atomic force microscopy (NC-AFM) is simulated by
                      ab initio calculations based on density functional theory.
                      The tip structures are modeled by silicon clusters with
                      [111] and [001] termination. For the often assumed
                      Si(111)-type tip we observe the sharpening of the initially
                      blunt tip via short-range chemical forces during the first
                      approach and retraction cycle. The structural changes
                      corresponding to this intrinsic process are irreversible and
                      lead to stable NC-AFM imaging conditions. In opposition to
                      the picture used in literature, the Si(001)-type tip does
                      not exhibit the so-called "two-dangling bond" feature as a
                      bulklike termination suggests.},
      keywords     = {J (WoSType)},
      cin          = {IFF-TH-I / JARA-FIT / JARA-SIM},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB30 / $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)VDB1045},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK414},
      shelfmark    = {Physics, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000234608300055},
      doi          = {10.1103/PhysRevLett.96.016101},
      url          = {https://juser.fz-juelich.de/record/52209},
}