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Lattice Orientations of Evaporated Metals onto Uniaxially Oriented, Semicrystalline, Ultra thin Polymer Films

Published online by Cambridge University Press:  25 February 2011

Klaus D. Jandt ,
Maren Buhk ,
Jürgen Petermann ,
Lukas M. Eng  and
Harald Fuchs
Klaus D. Jandt
Affiliation:
Technische Universität Hamburg-Harburg, Kunststoffe /Polymerc Verbundwerkstoffe, Denickestrafie 15, W-2100 Hamburg 90, Germany.
Maren Buhk
Affiliation:
Technische Universität Hamburg-Harburg, Kunststoffe /Polymerc Verbundwerkstoffe, Denickestrafie 15, W-2100 Hamburg 90, Germany.
Jürgen Petermann
Affiliation:
Technische Universität Hamburg-Harburg, Kunststoffe /Polymerc Verbundwerkstoffe, Denickestrafie 15, W-2100 Hamburg 90, Germany.
Lukas M. Eng
Affiliation:
Université de Genéve, Groupe de Physique Appliquée Biomédicale, 20, Rue de 1acute; École de Médecine, CH-1211 Genéve 4, Switzerland.
Harald Fuchs
Affiliation:
BASF AG, ZKM / T - J 543, W-6700 Ludwigshafen, Germany.
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Abstract

The textured oriented overgrowth (epitaxy) of certain metals evaporated onto substrates consisting of highly oriented ultra thin polymer films of polyethylene (PE), polypropylene (PP) and polybutene-1 (PB-1) has been well known since a few years. However, the origin of the observed epitaxy is not clear at all: graphoepitaxy (i. e. orientation induced by nucleation onto oriented topographic features of the substrate), the formation of a chemical layer (i. e. of metal-methyl groups building up the polymer-metal interface, or simply classic epitaxy (i.e. lattice matching) seem all to be possible explanations for the observed orientations. Here, we used Transmission Electron Microscopy (TEM) and Scanning Force Microscopy (SFM) to investigate the possibility of graphoepitaxial growth on polymeric surfaces. Our investigations show that the morphology of polymeric bulk material determine the topographic properties observed at the polymer surface. The semicrystalline nature of the polymer films leads to polymeric surface steps which are suitable as locations for graphoepitaxial growth. Artificial epitaxy (graphoepitaxy) seems to be the most likely orientation mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 280: Symposium B – Evolution of Surface and Thin Film Microstructure , 1992 , 345
Copyright
Copyright © Materials Research Society 1993

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References

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