Publikationen

Precise determination of graphene functionalization by in situ Raman spectroscopy

Autoren:Vecera, Philipp (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)); Chacón-Torres, Julio C. (Freie Universität Berlin (FU)); Pichler, Thomas; Reich, Stephanie (Freie Universität Berlin (FU)); Soni, Himadri R. (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)); Görling, Andreas (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)); Edelthalhammer, Konstantin (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)); Peterlik, Herwig; Hauke, Frank (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)); Hirsch, Andreas (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU))
Abstrakt:

The verification of a successful covalent functionalization of graphene and related carbon allotropes can easily be carried out by Raman spectroscopy. Nevertheless, the unequivocal assignment and resolution of individual lattice modes associated with the covalent binding of addends was elusive up to now. Here we present an in situ Raman study of a controlled functionalization of potassium intercalated graphite, revealing several new bands appearing in the D-region of the spectrum. The evolution of these bands with increasing degree of functionalization from low to moderate levels provides a basis for the deconvolution of the different components towards quantifying the extent of functionalization. By complementary DFT calculations we were able to identify the vibrational changes in the close proximity of the addend bearing lattice carbon atoms and to assign them to specific Raman modes. The experimental in situ observation of the developing functionalization along with the reoxidation of the intercalated graphite represents an important step towards an improved understanding of the chemistry of graphene.

Sprache:Englisch
Anzahl der Seiten:9
Publikationsdatum:8.5.2017
Journaltitel:Nature Communications
Volume:8
Peer reviewed:true
Links:
Digital Object Identifier (DOI):http://dx.doi.org/10.1038/ncomms15192
Publikationstyp:Artikel
Portal:https://ucris.univie.ac.at/portal/en/publications/precise-determination-of-graphene-functionalization-by-in-situ-raman-spectroscopy(43e5171e-8a09-4ecb-87ee-cbe5cc855255).html