Self-Assembly of Organic Films on a Liquid Metal

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Self-Assembly of Organic Films on a Liquid Metal

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Title: Self-Assembly of Organic Films on a Liquid Metal
Author: Magnussen, Olaf M.; Ocko, Benjamin M.; Deutsch, Moshe; Regan, Michael J.; Pershan, Peter S.; Abernathy, Douglas; Grubel, Gerhard; Legrand, Jean-Francois

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Citation: Magnussen, Olaf M., Benjamin M. Ocko, Moshe Deutsch, Michael J. Regan, Peter S. Pershan, Douglas Abernathy, Gerhard Grubel, and Jean-Francois Legrand. 1996. Self-assembly of organic films on a liquid metal. Nature 384(6606): 250-252.
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Abstract: The structure and phase behaviour of organic thin films result from the subtle interplay of intermolecular Van der Waals interactions, which promote self-assembly and long-ranged order, and the more complex interactions between the end groups of the organic chains and the substrate. The structure of molecular films of amphiphiles has been extensively studied on subphases of dielectric liquids, notably water (Langmuir mono-layers) and on solid surfaces (self-assembled monolayers, SAMs. Here we report structural studies, by synchrotron X-ray scattering, of an intermediate case: densely packed alka-nethiol films on the surface of liquid mercury. While, like SAMs, these films form strong chemical bonds to the subphase, this subphase is smooth and unstructured, as in the case of Langmuir monolayers. But unlike either of these, our films have no in-plane long-range order. We suggest that the strong interaction of the thiol group with the underlying disordered liquid dominates here over the order-promoting interactions of the alkyl chains.
Published Version: doi:10.1038/384250a0
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