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@ARTICLE{Wrana:857762,
      author       = {Wrana, Dominik and Rodenbücher, Christian and Jany,
                      Benedykt R. and Kryshtal, Oleksandr and Cempura, Grzegorz
                      and Kruk, Adam and Indyka, Paulina and Szot, Krzysztof and
                      Krok, Franciszek},
      title        = {{A} bottom-up process of self-formation of highly
                      conductive titanium oxide ({T}i{O}) nanowires on reduced
                      {S}r{T}i{O} 3},
      journal      = {Nanoscale},
      volume       = {11},
      number       = {1},
      issn         = {2040-3372},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {FZJ-2018-06730},
      pages        = {89-97},
      year         = {2019},
      abstract     = {Reduced titanium oxide structures are regarded as promising
                      materials for various catalytic and optoelectronic
                      applications. There is thus an urgent need for developing
                      methods of controllable formation of crystalline
                      nanostructures with tunable oxygen nonstoichiometry. We
                      introduce the Extremely Low Oxygen Partial Pressure (ELOP)
                      method, employing an oxygen getter in close vicinity to an
                      oxide during thermal reduction under vacuum, as an effective
                      bottom-up method for the production of nanowires arranged in
                      a nanoscale metallic network on a SrTiO3 perovskite surface.
                      We demonstrate that the TiO nanowires crystallize in a
                      highly ordered cubic phase, where single nanowires are
                      aligned along the main crystallographic directions of the
                      SrTiO3 substrate. The dimensions of the nanostructures are
                      easily tunable from single nanometers up to the mesoscopic
                      range by varying the temperature of reduction. The interface
                      between TiO and SrTiO3 (metal and insulator) was found to be
                      atomically sharp providing the unique possibility of the
                      investigation of electronic states, especially since the
                      high conductivity of the TiO nanostructures is maintained
                      after room temperature oxidation. According to the growth
                      model we propose, TiO nanowire formation is possible due to
                      the incongruent sublimation of strontium and
                      crystallographic shearing, triggered by the extremely low
                      oxygen partial pressure (ELOP). The controlled formation of
                      conductive nanowires on a perovskite surface holds
                      technological potential for implementation in memristive
                      devices, organic electronics, or for catalytic applications,
                      and provides insight into the mechanism of nanoscale phase
                      transformations in metal oxides. We believe that the ELOP
                      mechanism of suboxide formation is suitable for the
                      formation of reduced suboxides on other perovskite oxides
                      and for the broader class of transition metal oxides.},
      cin          = {PGI-7 / JARA-FIT},
      ddc          = {600},
      cid          = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {521 - Controlling Electron Charge-Based Phenomena
                      (POF3-521)},
      pid          = {G:(DE-HGF)POF3-521},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30226243},
      UT           = {WOS:000454327500036},
      doi          = {10.1039/C8NR04545C},
      url          = {https://juser.fz-juelich.de/record/857762},
}