Directed self-assembled crystalline oligomer domains on graphene and graphite

Nanotechnology
Frank BalzerPeter Bøggild

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.

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Citations

Nov 2, 2014·Physical Chemistry Chemical Physics : PCCP·Markus KratzerChristian Teichert
Jun 4, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Joao Henrique LopesGeraldine Merle
Jun 15, 2016·Nanotechnology·M Kratzer, C Teichert
Feb 7, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Mathias K Huss-HansenMatti Knaapila

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