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Systematic measurement of pentacene assembled on Cu(111) by bimodal dynamic force microscopy at room temperature

Kawai, Shigeki and Pawlak, Remy and Glatzel, Thilo and Meyer, Ernst. (2011) Systematic measurement of pentacene assembled on Cu(111) by bimodal dynamic force microscopy at room temperature. Physical Review B, Vol. 84, H. 8 , 085429.

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Official URL: http://edoc.unibas.ch/dok/A6001648

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Abstract

A wide range of depositions of pentacene on a Cu(111) surface was studied by frequency modulation bimodal dynamic force microscopy at room temperature. The morphologies and stabilities of the pentacene films were systematically studied via detections of the vertical and lateral tip-sample interactions at sub-molecular-scale resolution. At low coverage, pentacene adsorbs flat on the surface where two phases of molecular assemblies were observed. At the boundary between the different phase domains, a large magnitude of the dissipation energy, arising from the high mobility of pentacene, was measured while no significant increase of the dissipation energy was observed at the domain boundary of different orientations in the same phase. By increasing the amount of the deposited molecules, the second layer with the flatly aligned molecule tilted with a longitudinal molecular axis was observed over a small area, but most of the molecules moved to a certain site and formed crystallites with bulk structure on top of the first flat layer. We found that the work function of the bulk surface was strongly affected by the first flat layer.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Meyer, Ernst
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:0163-1829
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:11 Oct 2012 15:31
Deposited On:11 Oct 2012 15:21

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