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  Ge(001) As a Template for Long-Range Assembly of π-Stacked Coronene Rows

Martínez-Blanco, J., Mascaraque, A., Dedkov, Y., & Horn, K. (2012). Ge(001) As a Template for Long-Range Assembly of π-Stacked Coronene Rows. Langmuir, 28(8), 3840-3844. doi:10.1021/la205166m.

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CnGeprint.pdf (Any fulltext), 27B
 
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Martínez-Blanco, Jesus1, Author           
Mascaraque, Arantzazu2, 3, Author
Dedkov, Yuriy1, Author           
Horn, Karsten1, Author           
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1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2Universidad Complutense de Madrid, Madrid, Spain, ou_persistent22              
3Unidad Asociada IQFR (CSIC)-UCM, Madrid, Spain, ou_persistent22              

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 Abstract: The adsorption of coronene molecules (C₂₄H₁₂) on the Ge(001) surface has been studied by means of scanning tunnelling microscopy (STM). Upon room temperature deposition, the coronene molecules adsorb in an upright geometry forming compact layers patterned in rows for coverages of one monolayer and less, being the only example investigated so far in which a pure aromatic hydrocarbon forms a well-ordered monolayer on a non-passivated semiconductor surface. At half monolayer, the molecular rows consist of long chains of π-stacked molecules and the distance between molecular planes is 8 Å. This configuration is maintained upon cooling the system below the transition temperature of Ge(001) (~220 K), but the molecular layer experiences also a transition from rows perpendicular to rows parallel to the Ge dimer rows. We interpret our observations in terms of a weak bonging between molecules and substrate, which facilitates the formation of large ordered domains of molecules, revealing Ge(001) as an ideal template for the growth of this and other aromatic hydrocarbons.

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 Dates: 2012-01-272012-02-28
 Publication Status: Published in print
 Pages: 5
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 Rev. Type: Peer
 Identifiers: DOI: 10.1021/la205166m
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Title: Langmuir
Source Genre: Journal
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Publ. Info: Columbus, OH : American Chemical Society
Pages: - Volume / Issue: 28 (8) Sequence Number: - Start / End Page: 3840 - 3844 Identifier: ISSN: 0743-7463
CoNE: https://pure.mpg.de/cone/journals/resource/954925541194