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Crystalline films of small organic semiconductors offer attractive potential for electronic and optoelectronic applications. To realize such applications on flexible substrates, graphene as a transparent electrode material comes into play. We studied the growth of the rod-like oligophenylene molecule para-hexaphenyl (6P) on metal supported as well as on exfoliated graphene. On clean graphene, the molecules grow in a lying fashion on the substrate whereas contaminations cause the molecules to stand up. Islands of upright 6P molecules are also observed on ion-bombarded surfaces. We found recently that on ion bombarded rutile(110) under oblique incidence the resulting nanometer surface ripples significantly change the shape of the 6P islands.

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Christian Teichert, Montanuniversität Loeben, Austria
Seminar Room of the Institute of Physics II (R201)
Contact: Thomas Michely