Tuning the Reactivity of Graphene by Surface Phase Orientation

0474207 - ÚFCH JH 2018 RIV DE eng J - Článek v odborném periodiku
Plšek, Jan - Kovaříček, Petr - Valeš, Václav - Kalbáč, Martin
Tuning the Reactivity of Graphene by Surface Phase Orientation.
Chemistry - A European Journal. Roč. 23, č. 8 (2017), s. 1839-1845. ISSN 0947-6539. E-ISSN 1521-3765
Grant CEP: GA ČR(CZ) GAP208/12/1062; GA MŠMT(CZ) LM2015073
Grant ostatní: AVČR PPPLZ(CZ) L200401551
Institucionální podpora: RVO:61388955
Klíčová slova: chemical-vapor-deposition * fluorinated graphene * raman-spectroscopy
Obor OECD: Physical chemistry
Impakt faktor: 5.160, rok: 2017

Tuning the local reactivity of graphene is a subject of paramount importance. Among the available strategies, the activation/passivation of graphene by copper substrate is very promising because it enables the properties of graphene to be influenced without any transfer procedure, since graphene can be grown directly on copper. Herein, it is demonstrated that the reactivity of graphene towards fluorination is strongly influenced by the face of the surface of the copper substrate. Graphene on the copper foil was probed and grain orientations were identified. The results of the reactivity were evaluated by means of X-ray photo electron and Raman spectroscopy. Graphene on the grains with a surface orientation close to the (111) face is the most reactive, whereas graphene on the grains close to the (110) surface is least reactive. The long-term stability test showed that the decomposition of fluorinated graphene was slowest on the grains with a surface orientation close to the (111) face. The results are consistent with the variation of the mechanical strain of graphene on different faces of copper. In contrast, no clear correlation of the graphene reactivity with doping induced by different facets was found.
Trvalý link: http://hdl.handle.net/11104/0271327