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Issue 22, 2012
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First layer compression and transition to standing second layer of terephthalic acid on Cu(100)

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Abstract

Terephthalic acid on metal surfaces is a system of high interest for interfacial layers as well as for use in generating surface nanostructures by supramolecular self-assembly. Here we demonstrate structural transitions upon compression of the first layer as well as a significant transition from a flat lying chemisorbed first monolayer to a standing second layer. The second layer structure is stable at 150 °C, but a weakly bound state is observed to desorb molecularly below that temperature, likely a transient mobile state during annealing. Molecular resolution scanning tunnelling microscopy is complemented by X-ray photoelectron spectroscopy and thermal desorption spectroscopy in this study. These results provide general insight in the development of self-assembled organic thin films at surfaces, especially with regard to the nature of the metal/organic interface and growth transitions to maximize first layer packing and obtain a second layer that bridges commensurability with the substrate and a more bulk-like structure.

Graphical abstract: First layer compression and transition to standing second layer of terephthalic acid on Cu(100)

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Publication details

The article was received on 13 Feb 2012, accepted on 19 Apr 2012 and first published on 23 Apr 2012


Article type: Paper
DOI: 10.1039/C2CP41256J
Citation: Phys. Chem. Chem. Phys., 2012,14, 8217-8223
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    First layer compression and transition to standing second layer of terephthalic acid on Cu(100)

    S. L. Tait, H. Lim, A. Theertham and P. Seidel, Phys. Chem. Chem. Phys., 2012, 14, 8217
    DOI: 10.1039/C2CP41256J

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