Scanning tunneling microscopy image contrast as a function of scan angle in hydrogen-bonded self-assembled monolayers

Stephen J. Sowerby, Michael Edelwirth, Michael Reiter, Wolfgang M. Heckl

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Scanning tunneling microscopy (STM) has been performed on monolayers of the nucleic acid base, adenine adsorbed to molybdenum disulfide (MoS2) surface. Analysis of the real space image of the adsorbates, together with molecular mechanics simulations suggest that the molecules form monolayers stablized by cyclic hydrogen bonds We present data showing the effect on image contrast of varying scan angles of the STM tip. These indicate an anisotropic response of components of the monolayer to the scan direction and support a structural model implicating cyclic hydrogen bonds in both the stability of the monolayer and in the STM image contrast mechanism.

Original languageEnglish
Pages (from-to)5195-5202
Number of pages8
JournalLangmuir
Volume14
Issue number18
DOIs
StatePublished - 1 Sep 1998
Externally publishedYes

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