Characterization of PAH/DPPG layer-by-layer films by VUV spectroscopy - Duarte, Andreia A.; Gomes, Paulo J.; Ribeiro, Jorge H. F.; Ribeiro, Paulo A.; Hoffmann, Soren V.; Mason, Nigel John; Oliveira Junior, Osvaldo Novais de; Raposo, Maria (European Physical Journal E, 2013)