Temperature and face dependent copper–graphene interactions

0446587 - ÚFCH JH 2016 RIV US eng J - Článek v odborném periodiku
da Costa e Silva, S. - Ek Weis, Johan - Frank, Otakar - Kalbáč, Martin
Temperature and face dependent copper–graphene interactions.
Carbon. Roč. 93, NOV 2015 (2015), s. 793-799. ISSN 0008-6223. E-ISSN 1873-3891
Grant CEP: GA MŠMT LL1301
Institucionální podpora: RVO:61388955
Klíčová slova: graphene * charge transfer * copper
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 6.198, rok: 2015

The interaction between graphene and metals represents an important issue for the large-area preparation of graphene, graphene transfer and the contact quality in graphene devices. We demonstrate a simple method for estimating and manipulating the level of interaction between graphene and copper single crystals through heat treatment, at temperatures from 298 K to 1073 K. We performed in-situ Raman spectroscopy showing Cu face-specific behavior of the overlying graphene during the heat treatment. On Cu(1 1 1) the interaction is consistent with theoretical predictions and remains stable, whereas on Cu(1 0 0) and Cu(1 1 0), the initially very weak interaction and charge transfer can be tuned by heating. Our results also suggest that graphene grown on Cu(1 0 0) and Cu(1 1 0) is detached from the copper substrate, thereby possibly enabling an easier graphene transfer process as compared to Cu(1 1 1).
Trvalý link: http://hdl.handle.net/11104/0248566