De-aggregation of a polyfluorene derivative in clay nanocomposites: a photophysical study - Tozoni, José Roberto; Guimarães, Francisco Eduardo Gontijo; Atvars, Teresa Dib Zambon; Nowacki, Bruno; Marlleta, Alexandre; Akcelrud, Leni; Bonagamba, Tito José (European Polymer Journal, 2011)