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  • Title: Structural rearrangements during the initial growth stages of organic thin films of F16CuPc on SiO2.
    Author: de Oteyza DG, Barrena E, Sellner S, Ossó JO, Dosch H.
    Journal: J Phys Chem B; 2006 Aug 24; 110(33):16618-23. PubMed ID: 16913797.
    Abstract:
    We present an experimental study on the first stages of the thin film growth of the organic molecule F(16)CuPc (hexadecafluoro-copper-phthalocyanines) on SiO(2). By means of in situ X-ray reflectivity, in situ grazing incidence X-ray diffraction (GIXD), and ex situ atomic force microscopy (AFM), we provide a detailed picture of the film growth mode and its structural evolution at the nanometer scale. We discovered the formation of a low-density layer of molecular aggregates with heights between 5 and 10 A at the interface with the SiO(2) and show that, on top of this interfacial layer, the nucleation and two-dimensional growth of elongated islands of upright standing molecules take place. Structural changes are observed, pointing to significant relaxations of the lattice parameters within the first layers of standing molecules.
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