title: Structural Evolution of an Organic Semiconducting Molecule onto a Soft Substrate.
abstract: The structural organization and evolution of the organic semiconducting molecule 2,7-dioctyloxy[1]benzothieno[3,2-b]-benzothiophene on a soft matrix is studied. Thin films of a blend formed from polystyrene and the molecule were prepared by spin-coating onto silicon substrates, which were subsequently studied by using a combination of microscopy and scattering techniques. The organic semiconducting molecule segregated to the surface and developed a phase with a different structure to the bulk, as in the case of a substrate induced phase observed previously. Under a solvent vapor annealing procedure, the growth of micrometer-sized tetragonal crystals onto the polymer surface was observed, which was not evidenced for the silicon substrates.
authors: Département de Physique, Faculté des Sciences, Université Libre de Bruxelles CP223, Campus de la Plaine, 1050, Bruxelles, Belgium. danmarti@ulb.ac.be.
authors: Daniel E
authors: DE
authors: Martínez-Tong
authors: Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles CP206/01, Campus de la Plaine, 1050, Bruxelles, Belgium.
authors: Christian
authors: C
authors: Ruzié
authors: Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles CP206/01, Campus de la Plaine, 1050, Bruxelles, Belgium.
authors: Yves H
authors: YH
authors: Geerts
authors: Département de Physique, Faculté des Sciences, Université Libre de Bruxelles CP223, Campus de la Plaine, 1050, Bruxelles, Belgium.
authors: Michele
authors: M
authors: Sferrazza
keywords: crystal growth; interfaces; liquid crystals; nanostructures; thin films