TY  - JOUR
A1  - Pollinger, Florian
A1  - Schmitt, Stefan
A1  - Sander, Dirk
A1  - Tian, Zhen
A1  - Kirschner, Jürgen
A1  - Vrdoljak, Pavo
A1  - Stadler, Christoph
A1  - Maier, Florian
A1  - Marchetto, Helder
A1  - Schmidt, Thomas
A1  - Schöll, Achim
A1  - Umbach, Eberhard
T1  - Nanoscale patterning, macroscopic reconstruction, and enhanced surface stress by organic adsorption on vicinal surfaces
T2  - New Journal of Physics
N2  - Self-organization is a promising method within the framework of bottom-up architectures to generate nanostructures in an efficient way. The present work demonstrates that self- organization on the length scale of a few to several tens of nanometers can be achieved by a proper combination of a large (organic) molecule and a vicinal metal surface if the local bonding of the molecule on steps is significantly stronger than that on low-index surfaces. In this case thermal annealing may lead to large mass transport of the subjacent substrate atoms such that nanometer-wide and micrometer-long molecular stripes or other patterns are being formed on high-index planes. The formation of these patterns can be controlled by the initial surface orientation and adsorbate coverage. The patterns arrange self-organized in regular arrays by repulsive mechanical interactions over long distances accompanied by a significant enhancement of surface stress. We demonstrate this effect using the planar organic molecule PTCDA as adsorbate and Ag(10 8 7) and Ag(775)surfaces as substrate. The patterns are directly observed by STM, the formation of vicinal surfaces is monitored by highresolution electron diffraction, the microscopic surface morphology changes are followed by spectromicroscopy, and the macroscopic changes of surface stress are measured by a cantilever bending method. The in situ combination of these complementary techniques provides compelling evidence for elastic interaction and a significant stress contribution to long-range order and nanopattern formation.
KW  - physics
KW  - patterning
KW  - reconstruction
KW  - surface stress
KW  - STM
KW  - SPA-LEED
KW  - vicinal surfaces
KW  - adsoption
Y1  - 2017
UR  - https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/17194
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-171947
VL  - 19
ER  -