title: Directed self-assembled crystalline oligomer domains on graphene and graphite.
abstract: We observe the formation of thin films of fibre-like aggregates from the prototypical organic semiconductor molecule para-hexaphenylene (p-6P) on graphite thin flakes and on monolayer graphene. Using atomic force microscopy, scanning electron microscopy, x-ray diffraction, polarized fluorescence microscopy, and bireflectance microscopy, the molecular orientations on the surface are deduced and correlated to both the morphology as well as to the high-symmetry directions of the graphitic surface: the molecules align with their long axis at ±11° with respect to a high-symmetry direction. The results show that the graphene surface can be used as a growth substrate to direct the self-assembly of organic molecular thin films and nanofibres, both with and without lithographical processing.
authors.forename: Frank
authors.initials: F
authors.lastname: Balzer
authors.forename: Henrik H
authors.initials: HH
authors.lastname: Henrichsen
authors.forename: Mikkel B
authors.initials: MB
authors.lastname: Klarskov
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Booth
authors.forename: Rong
authors.initials: R
authors.lastname: Sun
authors.forename: Jürgen
authors.initials: J
authors.lastname: Parisi
authors.forename: Manuela
authors.initials: M
authors.lastname: Schiek
authors.forename: Peter
authors.initials: P
authors.lastname: Bøggild