Ultrathin responsive polyelectrolyte brushes studied by infrared synchrotron mapping ellipsometry

An infrared microfocus spectroscopic mapping ellipsometer was set up at the Berlin electron synchrotron storage ring and used to study ultrathin polyacrylic acid brush films with 3nm thickness. The pH-responsive properties of the brush on a gold-coated glass substrate were investigated. The chemical structure of the brush was resolved with a spatial resolution of 300μm using the synchrotron mapping ellipsometer.

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