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8332091 
Journal Article 
Composites of craphene with large aromatic molecules 
Su, Q; Pang, S; Alijani, V; Li, C; Feng, X; Mã¼Llen, K 
2009 
Yes 
Advanced Materials
ISSN: 0935-9648
EISSN: 1521-4095 
21 
31 
3191-3195 
English 
A study was conducted to demonstrate an approach to noncovalently functionalize graphene with large aromatic donor and acceptor molecules. It was demonstrated that these molecules produced a new class of graphene composites with tunable electronic properties. Pyrene-1-sulfonic acid sodium salt (PyS) was used as an electron donor and the diasodium salt of 3,4,9,10- perylenetetracarboxylic diimide bisbezenesulfonic acid (PDI) was selected as an electron acceptor for the investigations. Atomic force microscopy (AFS) images provided detailed information on the π-interactions between graphene sheets and aromatic donor or acceptor molecules at the solid state. All the samples were prepared by dip-coating of corresponding dispersions on freshly-cleaved mica. The significant π-interactions between donor and acceptor molecules and the graphene basal plane were also assumed to produce charge-transfer effects.