Cu-TBPP and PTCDA molecules on insulating surfaces studied by ultra-high-vacuum non-contact AFM

The adsorption of two kinds of porphyrin (Cu-TBPP) and perylene (PTCDA) derived organic molecules deposited on KBr and Al2O3 surfaces has been studied by non-contact force microscopy in ultra-high vacuum, our goal being the assembly of ordered molecular arrangements on insulating surfaces at room te...

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Bibliographic Details
Published in:Nanotechnology 2004-02, Vol.15 (2), p.S91-S96
Main Authors: Nony, L, Bennewitz, R, Pfeiffer, O, Gnecco, E, Baratoff, A, Meyer, E, Eguchi, T, Gourdon, A, Joachim, C
Format: Article
Language:English
Subjects:
Atomic and Molecular Clusters
Physics
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Summary:The adsorption of two kinds of porphyrin (Cu-TBPP) and perylene (PTCDA) derived organic molecules deposited on KBr and Al2O3 surfaces has been studied by non-contact force microscopy in ultra-high vacuum, our goal being the assembly of ordered molecular arrangements on insulating surfaces at room temperature. On a Cu(100) surface, well ordered islands of Cu-TBPP molecules were successfully imaged. On KBr and Al2O3 surfaces, it was found that the same molecules aggregate in small clusters at step edges, rather than forming ordered monolayers. First measurements with PTCDA on KBr show that nanometre-scale rectangular pits in the surface can act as traps to confine small molecular assemblies.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/15/2/019