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Nanoscale Assembly of Paramagnetic Organic Radicals on Au(111) Single Crystals

Authors

  • Sabine-Antonia Savu,

    1. Institute of Physical and Theoretical Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen (Germany), Fax: (+49) 7071-29-5490
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  • Dr. Indro Biswas,

    1. Institute of Physical and Theoretical Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen (Germany), Fax: (+49) 7071-29-5490
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  • Dr. Lorenzo Sorace,

    1. Department of Chemistry “U. Schiff” and INSTM RU, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI (Italy)
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  • Dr. Matteo Mannini,

    1. Department of Chemistry “U. Schiff” and INSTM RU, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI (Italy)
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  • Donella Rovai,

    1. Department of Chemistry “U. Schiff” and INSTM RU, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI (Italy)
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  • Prof. Andrea Caneschi,

    1. Department of Chemistry “U. Schiff” and INSTM RU, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI (Italy)
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  • Prof. Thomas Chassé,

    1. Institute of Physical and Theoretical Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen (Germany), Fax: (+49) 7071-29-5490
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  • Dr. Maria Benedetta Casu

    Corresponding author
    1. Institute of Physical and Theoretical Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen (Germany), Fax: (+49) 7071-29-5490
    • Institute of Physical and Theoretical Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen (Germany), Fax: (+49) 7071-29-5490

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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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