3D island growth of 6,13 Pentacenequinone on silicon oxide and gold

• Published in: Journal of non-crystalline solids Vol. 356; no. 37; pp. 2079 - 2082
• Main Authors: Parisse, P., Bussolotti, F., Passacantando, M., Ottaviano, L.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier B.V 15-08-2010; Elsevier
• Subjects: 6,13 Pentacenequinone; Condensed matter: structure, mechanical and thermal properties; Crystallites; Diffraction; Electrodes; Exact sciences and technology; Gold; Island growth; Phases; Physics; Silicon oxides; Structure and morphology; thickness; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin film structure and morphology; Thin films; X-rays; 6,13 Pentacenequinone; Island growth; Atomic force microscopy; Scanning electron microscopy; Gold; Wetting; XRD; Thin films; Silicon oxides; Scanning force microscopy; Microstructure; Vacuum evaporation; Island structure
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2010.05.071

We investigated the morphological and structural properties of 6,13 Pentacenequinone thin films (5–50
nm) grown by vacuum thermal evaporation on SiO
2 substrates with pre-patterned gold electrodes at room temperature using atomic force microscopy, scanning electron microscopy and X-ray diffraction. The X-ray diffraction always revealed the coexistence of two different crystalline phases, namely the bulk crystal phase and the thin film phase. A comparison of the diffraction data with atomic force microscopy and scanning electron microscopy measurements allowed assigning needle-like (compact) crystallites to the thin film (bulk) phase. The needle-like crystallites started to grow on flat two-dimensional islands lying on an initial wetting layer of Pentacenequinone. This is observed both on the bare silicon oxide substrate and on the polycrystalline gold electrodes.