STM study of molecule double-rows in mixed self-assembled monolayers of alkanethiols

Xu, Gengzhao, Woodruff, D. Phillip, Bennett, Neil, Elliott, Martin ORCID: https://orcid.org/0000-0002-9254-9898 and Macdonald, John Emyr ORCID: https://orcid.org/0000-0001-5504-1692 2010. STM study of molecule double-rows in mixed self-assembled monolayers of alkanethiols. Langmuir 26 (11) , pp. 8174-8179. 10.1021/la9044754

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Abstract

Using scanning tunnelling microscopy (STM), we have studied mixed self-assembled monolayers of linear alkanethiol molecules. Nonanedithiol (C9S2), nonanethiol (C9S), decanethiol (C10S), and dodecanethiol (C12S) were inserted into a self-assembled octanethiol (C8S) host matrix monolayer on an Au(111) surface using a two-step method. Quasi-one-dimensional double-row structures were found in the ordered, close-packed domains of the C8S matrix for each mixed monolayer system. These close-packed domains coexist with ordered striped phase domains (for C9S and C10S) or with a disordered phase (for C9S2 and C12S). Results from high-resolution images suggest that the double-rows are composed of inserted non-nearest-neighbor substitutional molecules, the ordering of which may be a result of locally induced surface stress.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Chemical Society
ISSN:	0743-7463
Last Modified:	17 Oct 2022 10:12
URI:	https://orca.cardiff.ac.uk/id/eprint/7323

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