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Advanced Materials

High order and submolecular imaging of end-capped quinquethiophene on Ag(111)

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  • This project was supported by the BMBF (project 01 BM 205/2). One of us (E. U.) thanks the Fond der Chemischen Industrie for financial support.

Abstract

Ultrathin films of functionalized oligomers with well-defined chain and conjugation lengths are of interest for organic electronic devices. Using the example of end-capped quinquethiophene vapor-deposited onto a Ag(111) surface, it is demonstrated that highly ordered monolayers of chemisorbed oligomers can be obtained in very large defect-free domains. LEED and STM (see Figure) studies provide information about the geometric parameters, molecular structure, and quality of the layers.

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