Reference : Local chemical composition of nanophase-separated polymer brushes
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Local chemical composition of nanophase-separated polymer brushes
Filimon, Marlena mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Kopf, Ilona [Ruhr-Universität Bochum - RUB]
Bründermann, Erik [Ruhr-Universität Bochum - RUB]
Havenith, Martina [Ruhr-Universität Bochum - RUB]
Physical Chemistry Chemical Physics
Royal Society of Chemistry
Yes (verified by ORBilu)
[en] Scannin near-filed microscopy ; polymer brushes ; local chemical composition
[en] Using scattering scanning nearfield infrared microscopy (s-SNIM), we have imaged the nanoscale
phase separation of mixed polystyrene–poly(methyl methacrylate) (PS–PMMA) brushes and
investigated changes in the top layer as a function of solvent exposure. We deduce that the
top-layer of the mixed brushes is composed primarily of PMMA after exposure to acetone, while
after exposure to toluene this changes to top layers dominated by PS. Access to simultaneously
measured topographic and chemical information allows direct correlation of the chemical
morphology of the sample with topographic information. Our results demonstrate the potential of s-SNIM for chemical mapping based on distinct infrared absorption properties of polymers with a high spatial resolution of 80 nm .
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