Dresden 2009 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 18: Layer Properties: Electrical, Optical and Mechanical Properties II

DS 18.2: Vortrag

Mittwoch, 25. März 2009, 11:30–11:45, GER 37

From cross-linked self-assembled monolayers to nanosheet multilayers — •Christoph T. Nottbohm, Andrey Turchanin, Andre Beyer, and Armin Gölzhäuser — Fakultät für Physik, Universität Bielefeld, Postfach 10 01 31, 33501 Bielefeld, Germany

Self-assembled monolayers of biphenylthiol on gold substrates have been cross-linked by electron irradiation resulting in the formation of nanosheets with a thickness of ∼1 nm. They have been released from the original substrate by etching and transferred to new substrates such as oxidized Si-wafers or transmission electron microscopy (TEM) grids. Transfer of multiple nanosheets onto the same substrate allows the preparation of nanosheet multilayers. Annealing at temperatures of up to ∼1200 K in ultrahigh vacuum leads to structural changes in the multilayers. These were systematically studied for different annealing temperatures and thicknesses ranging from ∼1 nm to ∼5 nm with the aid of x-ray photoelectron spectroscopy (XPS), UV/Vis spectroscopy and electrical 4-point measurements.