Tuning of cross-linking and mechanical properties of laser-deposited poly (methyl methacrylate) films

Erik Süske, Thorsten Scharf, Hans Ulrich Krebs, Elena Panchenko, Thomas Junkers, Mark Egorov, Michael Buback, Harald Kijewski

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The chemical composition, amount of cross-linking and its influence on the mechanical properties of poly(methyl methacrylate) (PMMA) thin films produced by pulsed laser deposition (PLD) at a wavelength of 248 nm under ultrahigh vacuum were investigated by infrared spectroscopy, scanning electron microscopy, size-exclusion chromatography, thermogravimetric analysis, and nanoindentation experiments. The films consist of two components, one fraction with a molecular weight well below that of the target material and a second fraction, which is cross-linked. Compared to bulk material, the Young's modulus of the film is increased. The amount of cross-linking in the film can be tuned by the applied laser fluence leading to changes of the mechanical properties.

Original languageEnglish
Article number063501
JournalJournal of Applied Physics
Issue number6
Publication statusPublished - 27 Jun 2005
Externally publishedYes

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