Supramolecular self-assembly and selective step decoration on the Au(111) surface

Europhysics Letters

Volumn 56, Issue 2, 2001, Pages 254-260

  Vladimirova, M ^a   Stengel, M ^a   De Vita, A ^a,b   Baldereschi, A ^a   Bohringer M ^c   Morgenstern, K ^c   Berndt, R ^d   Schneider, W D ^d  

^a Inst Romand de Rech N   (Switzerland)

^b UNIVERSITY OF TRIESTE   (Italy)

^c UNIVERSITY OF LAUSANNE   (Switzerland)

^d UNIVERSITY OF KIEL   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0035797806     PISSN: 02955075     EISSN: None     Source Type: Journal    
DOI: 10.1209/epl/i2001-00514-3     Document Type: Article

References (22)

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3. Annealing to 5 K instead of the 50 K value used in previous imaging [2] has the scope of improving the quality of the STM images. Given the nature of the interactions present in the system, the slow cooling adopted (> 24 h) provides ample time for relaxation, and the resulting molecular structures are expected to be thermodynamically stable [4].
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13. ads| = 0.005 eV per surface atom on the adsorption energy.
14. The main features of the potential in the different (11̄0) planes involved in the average procedure are similar.
15. ALVEY M. D. et al., J. Chem. Phys., 65 (1986) 6093.
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17. The model in ref. [2] takes into account the electrostatic interaction and the short-range Pauli repulsion between the molecules, while the presence of the metal surface is modeled by an image charge potential.
18. Notably, ref. [2] reported that these clusters owe their relative stability to the high truncation energy cost associated to the corresponding straight chains.
19. 2 groups in the center and external sides of positive polarity are observed on terraces at higher coverage [2]. According to the present model, twin chains could also develop along the lower step side. This is indeed observed experimentally.
20. We suppose that an isolated molecule on the terrace far away from the step has zero energy; i.e. adsorption energy is not included in the cohesive energy.
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