Surface morphology of polyethylene glycol films produced by matrix-assisted pulsed laser evaporation (MAPLE): Dependence on substrate temperature |
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Authors: | Katarzyna Rodrigo,Pawel Czuba,Jø rgen Schou,Roman Pedrys |
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Affiliation: | a Department of Optics and Plasma Research, Risø National Laboratory, DK-4000 Roskilde, Denmark b Institute of Physics, Jagiellonian University, PL-30 059 Krakow, Poland |
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Abstract: | The dependence of the surface morphology on the substrate temperature during film deposition was investigated for polyethylene glycol (PEG) films by matrix-assisted pulsed laser evaporation (MAPLE). The surface structure was studied with a combined technique of optical imaging and AFM measurements. There was a clear difference between the films produced below and above the melting point of PEG. For temperatures above the melting point, the polymer material was distributed non-uniformly over the substrate with growths areas, where cluster-like structures merge into large islands of micrometer size. At these temperatures, the islands in the investigated growth areas cover most of the bottom layer which has a typical height of 50-150 nm. |
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Keywords: | Morphology MAPLE PEG |
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