Nanoaggregates from oligothiophenes and oligophenylenes: a systematic growth survey

Frank Balzer; Laxman Kankate; Horst Niehus; Horst-Gunter Rubahn

doi:10.1117/12.589402

4 April 2005 Nanoaggregates from oligothiophenes and oligophenylenes: a systematic growth survey

Frank Balzer, Laxman Kankate, Horst Niehus, Horst-Gunter Rubahn

Proceedings Volume 5724, Organic Photonic Materials and Devices VII; (2005) https://doi.org/10.1117/12.589402
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

The growth of nanoscopic oligophenylene and oligothiophene aggregates on muscovite mica by vacuum deposition has been investigated. In the case of para-phenylenes a dipole assisted self assembly generation of needle-like aggregates is observed on mica. At optimum fiber growth temperature phenylene aggregates grow in most cases without a layer of upright oriented molecules. In contrast, vacuum deposition of oligothiophenes results simultaneously in fibers of laying molecules as well as islands of upright molecules. Since both phenylenes and thiophenes are strongly polarizable but differ in the lattice parameters of the resulting crystalline overlayers a direct comparison between the two classes of molecules allows us to study the role of epitaxy on the growth of nanoaggregates. Besides straight aggregates we also observe thiophene rings on water and methanol treated mica surfaces, which consist of radially oriented, laying molecules.

Citation Download Citation

Frank Balzer, Laxman Kankate, Horst Niehus, and Horst-Gunter Rubahn "Nanoaggregates from oligothiophenes and oligophenylenes: a systematic growth survey", Proc. SPIE 5724, Organic Photonic Materials and Devices VII, (4 April 2005); https://doi.org/10.1117/12.589402

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