Nanoscale Assembly of Paramagnetic Organic Radicals on Au(111) Single Crystals |
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Authors: | Sabine‐Antonia Savu Dr Indro Biswas Dr Lorenzo Sorace Dr Matteo Mannini Donella Rovai Prof Andrea Caneschi Prof Thomas Chassé Dr Maria Benedetta Casu |
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Institution: | 1. Institute of Physical and Theoretical Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen (Germany), Fax: (+49)?7071‐29‐5490;2. Department of Chemistry “U. Schiff” and INSTM RU, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI (Italy) |
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Abstract: | The successful thin‐film deposition of a pyrene‐substituted nitronyl nitroxide radical under controlled conditions has been demonstrated. The electronic properties, chemical environment at the interface, and morphology of the thin films have been investigated by a multitechnique approach. Spectroscopic and morphological analyses indicate a Stranski–Krastanov growth mode and weak physisorption of molecules onto the metallic surface. Electron spin resonance (ESR) spectroscopy shows that evaporation processes and deposition do not affect the paramagnetic character of the molecules. Useful concepts for the engineering of new, purely organic‐based magnets, which may open the way to fruitful exploitation of organic molecular‐beam deposition for assembly on solid surfaces in view of future technological applications, are presented. |
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Keywords: | electron spin resonance EPR spectroscopy magnetism nitronyl nitroxides organic radicals thin films X‐ray absorption spectroscopy |
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