Dimerization boosts one-dimensional mobility of conformationally adapted porphyrins on a hexagonal surface atomic lattice

M. Eichberger, M. Marschall, J. Reichert, A. Weber-Bargioni, W. Auwärter, R. L C Wang, H. J. Kreuzer, Y. Pennec, A. Schiffrin, J. V. Barth

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Abstract

We employed temperature-controlled fast-scanning tunneling microscopy to monitor the diffusion of tetrapyridylporphyrin molecules on the Cu(111) surface. The data reveal unidirectional thermal migration of conformationally adapted monomers in the 300-360 K temperature range. Surprisingly equally oriented molecules spontaneously form dimers that feature a drastically increased one-dimensional diffusivity. The analysis of the bonding and mobility characteristics indicates that this boost is driven by a collective transport mechanism of a metallosupramolecular complex.

Original languageEnglish
Pages (from-to)4608-4613
Number of pages6
JournalNano Letters
Volume8
Issue number12
DOIs
Publication statusPublished - Dec 2008
Externally publishedYes

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