TY  - JOUR
AU  - Stadler, C.
AU  - Hansen, S.
AU  - Kröger, I.
AU  - Umbach, E.
AU  - Kumpf, C.
TI  - Tuning intermolecular interaction in long-range-ordered submonolayer organic films
JO  - Nature physics
VL  - 5
SN  - 1745-2473
CY  - Basingstoke
PB  - Nature Publishing Group
M1  - PreJuSER-10311
SP  - 153 - 158
PY  - 2009
N1  - We thank F. Pollinger and the ESRF staff ( T.- L. Lee, J. Zegenhagen) for their help during the XSW experiments. Financial support by the BMBF, the DFG and the ESRF is acknowledged.
AB  - The future success of organic electronic devices strongly depends on the ability to tailor the properties of thin films and interfaces. This calls for well-ordered thin films. However, their properties are dominantly influenced by the formation of the first molecular layer representing a template for further growth. The development of the first layer-in turn-depends on the fine balance of molecule-substrate and molecule-molecule interaction. The latter is usually attractive owing to van der Waals forces and causes the formation of islands and small crystalline grains. Here, we report on organic adsorbates exhibiting a repulsive intermolecular interaction. With increasing coverage, Sn-phthalocyanine molecules continuously rearrange on Ag(111) in a series of ordered superstructures. They always fill the surface terraces homogeneously and maximize the domain size. Thicker films also exhibit extremely large, monocrystalline grains and potentially enable bulk-like properties for thin films. The intermolecular interaction can be tuned by cooling and becomes attractive below similar to 120 K.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000263458500021
DO  - DOI:10.1038/nphys1176
UR  - https://juser.fz-juelich.de/record/10311
ER  -