Changes in the electronic structure and properties of graphene induced   by molecular charge-transfer
  Interaction with electron donor and acceptor molecules such as aniline and nitrobenzene brings about marked changes in the Raman spectrum and the electronic structure of graphene, prepared by the exfoliation of graphitic oxide. 
Barun Das, Rakesh Voggu, Chandra Sekhar Rout, C. N. R. Rao