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Scanning tunneling microscopy study of pentacene adsorption on Ag/Si(1 1 1)-(√3 × √3)R30° by Ph. Guaino; D. Carty; G. Hughes; P. Moriarty; A.A. Cafolla is a Materials Science article available to read on EtoBox.

What is Scanning tunneling microscopy study of pentacene adsorption on Ag/Si(1 1 1)-(√3 × √3)R30° about?

The adsorption of pentacene (C 22 H 14 ) on Ag/Si(1 1 1)-( p 3 Â p 3)R308 has been investigated using ultrahigh-vacuum scanning tunneling microscopy at room temperature (RT). Three distinct phases are observed as a function of pentacene coverage. At low coverage the molecules adopt a head-to-head orientation forming a molecular row structure. At a coverage of one monolayer (1 ML), the molecules adsorb between the rows to adopt a close-packed side-by-side orientation, which is mediated by a van der Waals interaction. Higher coverage lead to a molecular reorganization which is interpreted as a tilting of the pentacene molecules from a planar to an upright configuration.

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Author

Ph. Guaino; D. Carty; G. Hughes; P. Moriarty; A.A. Cafolla

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0169-4332)

Published

2003

Language

EN

Field

Materials Science (Physical Sciences)