Journal article
Intermixed Adatom and Surface‐Bound Adsorbates in Regular Self‐Assembled Monolayers of Racemic 2‐Butanethiol on Au(111)
University of Sydney1
NanoChemistry, Department of Chemistry, Technical University of Denmark2
Department of Chemistry, Technical University of Denmark3
Organic Chemistry, Department of Chemistry, Technical University of Denmark4
Xiamen University5
Chinese Academy of Sciences6
Shanghai University7
In situ scanning tunneling microscopy combined with density functional theory molecular dynamics simulations reveal a complex structure for the self‐assembled monolayer (SAM) of racemic 2‐butanethiol on Au(111) in aqueous solution. Six adsorbate molecules occupy a (10×√3)R30° cell organized as two RSAuSR adatom‐bound motifs plus two RS species bound directly to face‐centered‐cubic and hexagonally close‐packed sites.
This is the first time that these competing head‐group arrangements have been observed in the same ordered SAM. Such unusual packing is favored as it facilitates SAMs with anomalously high coverage (30 %), much larger than that for enantiomerically resolved 2‐butanethiol or secondary‐branched butanethiol (25 %) and near that for linear‐chain 1‐butanethiol (33 %).
Language: | English |
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Publisher: | WILEY‐VCH Verlag |
Year: | 2015 |
Pages: | 928-932 |
ISSN: | 14397641 and 14394235 |
Types: | Journal article |
DOI: | 10.1002/cphc.201402904 |
ORCIDs: | Gan, Shiyu , Tanner, David Ackland and Zhang, Jingdong |