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Proceedings Paper

Nanoaggregates from oligothiophenes and oligophenylenes: a systematic growth survey
Author(s): Frank Balzer; Laxman Kankate; Horst Niehus; Horst-Gunter Rubahn
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Paper 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.

Paper Details

Date Published: 4 April 2005
PDF: 10 pages
Proc. SPIE 5724, Organic Photonic Materials and Devices VII, (4 April 2005); doi: 10.1117/12.589402
Show Author Affiliations
Frank Balzer, Humboldt-Univ. zu Berlin (Germany)
Laxman Kankate, Humboldt-Univ. zu Berlin (Germany)
Horst Niehus, Humboldt-Univ. zu Berlin (Germany)
Horst-Gunter Rubahn, Syddansk Univ. (Denmark)

Published in SPIE Proceedings Vol. 5724:
Organic Photonic Materials and Devices VII
James G. Grote; Toshikuni Kaino; Francois Kajzar, Editor(s)

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