TY  - JOUR
AU  - Schleicher, Sebastian
AU  - Borca, Bogdana
AU  - Rawson, Jeffrey
AU  - Matthes, Frank
AU  - Bürgler, Daniel E.
AU  - Kögerler, Paul
AU  - Schneider, Claus M.
TI  - Ultra-High Vacuum Deposition of Pyrene Molecules on Metal Surfaces
JO  - Physica status solidi / B
VL  - 255
IS  - 10
SN  - 0370-1972
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2018-06101
SP  - 1800235
PY  - 2018
AB  - Interfacial properties of organic adsorbates featuring aromatic π‐orbitals on metal surfaces play an important role for organic electronics and spintronics. Pyrene is a flat aromatic molecule with a size between ultimately small benzene and extended graphene segments. The deposition of pyrene molecules onto clean and reactive surfaces with a sub‐monolayer coverage under ultra‐high vacuum (UHV) conditions is challenging, since pyrene is a solid with a high vapor pressure. Here, a sublimation procedure under UHV and image pyrene adlayers on in situ prepared Au(111) and Fe/W(110) substrates by means of low‐temperature scanning tunneling microscopy is presented. For Au(111), the molecule–surface interaction is weak as indicated by the specific herringbone reconstruction of the Au(111) surface that is visible through the self‐assembled pyrene adlayer. Pyrene desorption due to weak intermolecular interaction self‐limits the growth to one monolayer (ML). On the more reactive 2–4 ML thick Fe films on W(110), the molecular order of the pyrene adlayer sensitively depends on the Fe thickness‐dependent dislocation pattern at the substrate surface. Irregular arrangements occur for 1 ML Fe and near substrate dislocations for 2–4 ML Fe. Self‐assembled ordered arrays form predominantly for 2 ML Fe, where the dislocation pattern leaves sufficiently large unperturbed areas between the dislocation lines.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000447304700016
DO  - DOI:10.1002/pssb.201800235
UR  - https://juser.fz-juelich.de/record/856757
ER  -