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Updated: Jul 20, 2025

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Published on: June 28, 2018
Spin-Injection in Graphene: An EPR and Raman Study
Christos Fragkogiannis1, Loukas Belles2, Dimitrios P Gournis3
1Materials Science Department, University of Patras, 26504, Rio, Greece.
None:
In this article, the enrichment of graphene and graphene oxide with free radicals through their functionalization with tyrosine is studied. In contrast with what is commonly observed in the functionalization of graphene with organic species the addition of tyrosine radicals on to the graphene substrate led to a remarkable increase of the aromatic character as indicated by the spectroscopic data. Similar behaviour was observed for the functionalization of graphene oxide. In addition, a brief analysis of the tyrosine functionalized graphene with EPR spectroscopy showed a remarkable enhancement of the spin density that could be useful in spintronics.
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