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@ARTICLE{Safari:916657,
      author       = {Safari, Mohammad Reza and Matthes, Frank and Ernst,
                      Karl-Heinz and Bürgler, Daniel E. and Schneider, Claus M.},
      title        = {{D}eposition of {C}hiral {H}eptahelicene {M}olecules on
                      {F}erromagnetic {C}o and {F}e {T}hin-{F}ilm {S}ubstrates},
      journal      = {Nanomaterials},
      volume       = {12},
      number       = {19},
      issn         = {2079-4991},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2023-00009},
      pages        = {3281 -},
      year         = {2022},
      abstract     = {The discovery of chirality-induced spin selectivity (CISS),
                      resulting from an interaction between the electron spin and
                      handedness of chiral molecules, has sparked interest in
                      surface-adsorbed chiral molecules due to potential
                      applications in spintronics, enantioseparation, and
                      enantioselective chemical or biological processes. We study
                      the deposition of chiral heptahelicene by sublimation under
                      ultra-high vacuum onto bare Cu(111), Co bilayer nanoislands
                      on Cu(111), and Fe bilayers on W(110) by low-temperature
                      spin-polarized scanning tunneling microscopy/spectroscopy
                      (STM/STS). In all cases, the molecules remain intact and
                      adsorb with the proximal phenanthrene group aligned parallel
                      to the surface. Three degenerate in-plane orientations on
                      Cu(111) and Co(111), reflecting substrate symmetry, and only
                      two on Fe(110), i.e., fewer than symmetry permits, indicate
                      a specific adsorption site for each substrate. Heptahelicene
                      physisorbs on Cu(111) but chemisorbs on Co(111) and Fe(110)
                      bilayers, which nevertheless remain for the sub-monolayer
                      coverage ferromagnetic and magnetized out-of-plane. We are
                      able to determine the handedness of individual molecules
                      chemisorbed on Fe(110) and Co(111), as previously reported
                      for less reactive Cu(111). The demonstrated deposition
                      control and STM/STS imaging capabilities for heptahelicene
                      on Co/Cu(111) and Fe/W(110) substrate systems lay the
                      foundation for studying CISS in ultra-high vacuum and on the
                      microscopic level of single molecules in controlled atomic
                      configurations.},
      cin          = {PGI-6},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {5213 - Quantum Nanoscience (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5213},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {36234411},
      UT           = {WOS:000867959100001},
      doi          = {10.3390/nano12193281},
      url          = {https://juser.fz-juelich.de/record/916657},
}