Berlin 2008 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 3: Organic Thin Films

DS 3.5: Vortrag

Montag, 25. Februar 2008, 15:30–15:45, H 2013

Morphological and electrical characterisation of discotic liquid crystals thin films — •Annalisa Calò¹, Pablo Stoliar¹, Massimiliano Cavallini¹, Yves Henri Geerts², and Fabio Biscarini¹ — ¹CNR-ISMN, Via Gobetti 101 Bologna (BO) 40129 Italy — ²ULB, Laboratoire de Chimie des Polimères, CP 206/1, Boulevard du Triomphe, Brussels 1050 Belgium

In this work we study the correlation between the morphology and the electrical transport on thin films of H2Pc(OC14,10)4. Here we present a comprehensive morphological characterisation by means of both cross-polarisers optical microscopy (O.M.) and atomic force microscopy (AFM) changing the temperature across the different phases, i.e. columnar rectangular, columnar hexagonal, and melted phase. These microscopic techniques also provide information about the films stability depending on the interactions with the surface. We developed an in-situ experimental setup to obtain the electrical characterisation contemporary with the morphological study in order to study how the electrical transport relates to the molecular aggregation.