STM and STS investigation of ultrathin tin phthalocyanine layers adsorbed on HOPG(0001) and Au(111)

Karsten Walzer, M. Hietschold

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The initial adsorption of tin phthalocyanine (SnPc) on graphite and gold surfaces was studied by low-temperature UHV-STM. At submonolayer coverages on highly oriented pyrolytic graphite (HOPG), SnPc forms substrate-defined molecular chains, while SnPc monolayers reveal dense packed structures with the molecules symmetry. A comparitive study with CuPc on HOPG reveals similar chains in the submonolayer regime. No chains were found upon SnPc adsorption onto Au(1 1 1). At ordered SnPc/HOPG films with thickness around one monolayer, local I(V) curves were collected with high reproducibility. Their wide energy gap shows the semiconductive properties of the SnPc monolayers. A strongly increased differential conductivity was observed at distinct energy values.
    Original languageEnglish
    JournalSurface Science
    Volume471
    Issue number1-3
    Pages (from-to)1-10
    ISSN0039-6028
    Publication statusPublished - 2001

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