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    Brewster angle microscopy and surface potential measurements of Langmuir-Blodgett films of zinc tri(tert-butyl)-4-sulphophthalocyanine

    Year: 2005

    Journal: Applied Surface Science 246 (2005) 425-429, 20111221

    Authors: Florencio Peacorada, Jorge Souto, Jose A. de Saja, Ludwig Brehmer

    Organizations: aBosch Group Espana, Fabrica de Castellet S.A., RBEC/EKF, Ctra. Castelleta St. Marcal Km. 13, bDept. Fisica de la Materia Condensada, Universidad de Valladolid, Prado de la Magdalena s/n, 47011 Valladolid, Spain cUniversität Potsdam, Institut für Physik, Am Neuen Palais 10, D-14469 Potsdam, Germany

    The formation of a Langmuir monolayer of an amphiphilic derivative of zinc phthalocyanine (Na[ZnPctSO3]) has been studied by means of surface potential technique and Brewster angle microscopy. The experiments were undertaken in order to understand the behaviour of this monolayer with a well-defined surface pressure isotherm. The floating film is described as a truly monomolecular layer formed by very rigid islands in which the phthalocyanine units tend to take on a preferential orientation with their planes perpendicular to the air-water interface, for high values of the surface pressure.