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Article Dans Une Revue Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces Année : 2012

Variable temperature STM study of Co deposition on a dodecanethiol self assembled monolayer

Résumé

The present scanning tunneling microscopy study reports on the growth processes of Co vapor-deposited on a dodecanethiol (DDT) self-assembled monolayer (SAM)/Au(111). We observe strongly modified surface and depth diffusions of Co adatoms depending on the growth temperature. Co deposited at 300 K shows an extremely incomplete regime of condensation on the organic layer. Besides, Co penetrates the DDT monolayer and resides at the DDT/Au(111) interface as 2D clusters. This phenomenon takes place through defects in the SAM which are transient channels. In contrast, Co deposited at 50 K shows a complete condensation and nucleates on defects of the SAM layer as 3D islands sitting most likely on top of the DDTs. These results are of interest in the growing field of organic spintronics where the quality of the organic/ferromagnetic interface is a key issue. (C) 2011 Elsevier B.V. All rights reserved.

Dates et versions

hal-01987565 , version 1 (21-01-2019)

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Romain Breitwieser, Paolo Campiglio, Cyril Chacon, Vincent Repain, Ruidy Nemausat, et al.. Variable temperature STM study of Co deposition on a dodecanethiol self assembled monolayer. Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2012, 606 (3-4), pp.542-548. ⟨10.1016/j.susc.2011.11.027⟩. ⟨hal-01987565⟩
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