Molecular nano-arches on silicon

The formation of molecular nano-arches on the Si(1 1 1)-7 × 7 surface was modeled using density functional theory (DFT). It has been suggested, based on the calculations, that the arches are formed by molecular dimers of chlorobenzene at near-monolayer coverages. Molecules of the dimer are covalentl...

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Published in:Surface science 2007-08, Vol.601 (15), p.3202-3206
Main Author: Dobrin, S.
Format: Article
Language:English
Subjects:
Chlorobenzene
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Density functional theory (DFT)
Exact sciences and technology
Molecular nanostructures
Physics
Silicon surface
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description The formation of molecular nano-arches on the Si(1 1 1)-7 × 7 surface was modeled using density functional theory (DFT). It has been suggested, based on the calculations, that the arches are formed by molecular dimers of chlorobenzene at near-monolayer coverages. Molecules of the dimer are covalently bound to two silicon adatoms and to each other thereby forming a molecular arch on the surface. The structure of the molecular dimer was calculated at the B3LYP/6-31G(d) level of theory. The dimers were found to be stable at room temperature, and to form a near-monolayer coverage, which has been observed in the experiment [X.H. Chen, Q. Kong, J.C. Polanyi, D. Rogers, S. So, Surf. Sci. 340 (1995) 224; Y. Cao, J.F. Deng, G.Q. Xu, J. Chem. Phys. 112 (2000) 4759].
doi_str_mv 10.1016/j.susc.2007.05.031
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subjects Chlorobenzene
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Density functional theory (DFT)
Exact sciences and technology
Molecular nanostructures
Physics
Silicon surface
title Molecular nano-arches on silicon
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