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13,6-N-Sulfinylacetamidopentacene (SAP) has been transferred on solid substrates both by water-rich environment and organic solvents without altering his chemical structure. Thermal conversion of SAP to pentacene leads to crystals showing similar features of vacuum-sublimated pentacene both in the bulk and thin-film phases. The thin-film phase is strongly affected by the substrate surface properties. Low energy Si–CH3 rich surfaces allow for the formation of compact micrometric crystals following a Volmer–Weber like growth with orientation suitable for field-effect carrier mobility. Screw dislocations along with straight edges are found on these systems as an indication of a loose interlayer interaction with respect to the lateral π–π intermolecular forces. In contrast, higher energy SiOH rich surfaces result in non-compact systems (Stransky–Krastanov like growth) arising by in-space randomly oriented crystals as …
Publication date: 
15 Feb 2008

Chiara Musumeci, Claudia Cascio, Antonino Scandurra, Giuseppe F Indelli, Corrado Bongiorno, Sebastiano Ravesi, Bruno Pignataro

Biblio References: 
Volume: 602 Issue: 4 Pages: 993-1005
Surface Science