Non-covalent functionalization of single wall carbon nanotubes and graphene by a conjugated polymer

Jilili Jiwuer, Ayjamal Abdurahman, Oğuz Gülseren, Udo Schwingenschlögl

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We report first-principles calculations on the binding of poly[(9,9-bis-(6-bromohexylfluorene-2,7-diyl)-co-(benzene-1,4-diyl)] to a (8,0) single wall carbon nanotube (SWCNT) and to graphene. Considering different relative orientations of the subsystems, we find for the generalized gradient approximation a non-binding state, whereas the local density approximation predicts reasonable binding energies. The results coincide after inclusion of van der Waals corrections, which demonstrates a weak interaction between the polymer and SWCNT/graphene, mostly of van der Waals type. Accordingly, the density of states shows essentially no hybridization. The physisorption mechanism explains recent experimental observations and suggests that the conjugated polymer can be used for non-covalent functionalization.
Original languageEnglish (US)
Pages (from-to)013103
JournalApplied Physics Letters
Volume105
Issue number1
DOIs
StatePublished - Jul 7 2014

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