Journal Article

PreJuSER-3805

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Field Emission Resonances at Tip/alpha, omega-Mercaptoalkyl-ferrocene/Au Interfaces Studied by STM

Müller-Meskamp, L.FZJ* ; Karthäuser, S.FZJ* ; Zandvliet, H. J. W. ; Homberger, M.FZJ* ; Simon, U.FZJ* ; Waser, R.FZJ*

2009
Wiley-VCH Verl. Weinheim

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Please use a persistent id in citations: doi:10.1002/smll.200800802

Abstract: The electrical properties of alpha,omega-mercaptoalkyl ferrocenes with different alkyl chain lengths embedded in a self-assembled host matrix of alkanethiols on Au(111) are studied by scanning tunneling microscopy and spectroscopy. Based on current-distance spectroscopy, as well as on the evaluation of Fowler-Nordheim tunneling current oscillations, the apparent barrier height of ferrocene is determined independently by two methods. The electronic coupling of the ferrocene moiety to the Au(111) substrate is shown to depend on the length of the alkane-spacer chain. In a double tunnel junction model our experimental findings are explained, addressing the role of the different molecular moieties of the mercaptoalkyl ferrocenes.

Keyword(s): Ferrous Compounds: chemistry (MeSH) ; Gold: chemistry (MeSH) ; Microscopy, Scanning Tunneling: methods (MeSH) ; Ferrous Compounds ; ferrocene ; Gold ; J ; charge transfer (auto) ; ferrocene (auto) ; field-emission resonance (auto) ; scanning tunneling microscopy (auto) ; self-assembled monolayers (auto)

Note: The authors thank Christina Lennartz, Peter Kowalzik, Hans Haselier, Holger John, Birgit Hahn, and Jutto Kiesgen for their support and the Institute for Functional Materials for Information Technology (IFMIT) for funding.

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Contributing Institute(s):

1. Elektronische Materialien (IFF-6)
2. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2009

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