Contacting a single molecular wire by STM manipulation

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • F. Moresco - , Free University of Berlin (Author)
  • L. Gross - , Free University of Berlin (Author)
  • L. Grill - , Free University of Berlin (Author)
  • M. Alemani - , Free University of Berlin (Author)
  • A. Gourdon - , CEMES Centre d'Elaboration de Materiaux et d'Etudes Structurales (Author)
  • C. Joachim - , CEMES Centre d'Elaboration de Materiaux et d'Etudes Structurales (Author)
  • K. H. Rieder - , Free University of Berlin (Author)

Abstract

The Lander molecule (C90H98) consists of a long polyaromatic molecular wire and four lateral di-tert-butyl-phenyl spacer groups, designed to maintain the molecular wire parallel above the substrate. It represents a model system for investigating the electronic contacts of a molecular wire to a nanoscale metallic electrode. In this article, some recent manipulation experiments of single Lander molecules by low temperature scanning tunneling microscopy (LT-STM) are presented. The selective adsorption of the molecule, the molecule-induced reconstruction of copper substrates, and their application to the investigation of contacts between molecules and nanostructures or between molecules are discussed. Manipulation experiments are reported, where the molecular wire part of a Lander molecule is contacted to a monoatomic step and to a two-atom-wide metallic nanostructure. The contact is characterized by the apparent height of the contact point in STM images and, in case of the Cu(111) substrate, by the perturbation observed in the electronic standing wave patterns.

Details

Original languageEnglish
Pages (from-to)913-920
Number of pages8
JournalApplied Physics A: Materials Science and Processing
Volume80
Issue number5
Publication statusPublished - Feb 2005
Peer-reviewedYes
Externally publishedYes

External IDs

ORCID /0000-0001-9607-8715/work/142252635

Keywords