Journal
NANO LETTERS
Volume 8, Issue 12, Pages 4608-4613Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl802995u
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Funding
- ESF-EURO-CORES-SONS Project FunSMARTs
- Canada Foundation
- British Columbia Knowledge and Development Fund
- Canadian National Science and Engineering Research Council
- Stiftung der Deutschen Wirtschaft
- Deutscher Akademischer Austauschdienst
- Humboldt Research Award
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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.
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