In-situ observation of diffusion in layer-by-layer polyelectrolyte films
Polyelectrolyte layer-by-layer films are prepared by sequential adsorption of oppositely charged polyelectrolytes. The films consist of a deuterated and a protonated slab prepared by selectively deuterated polyanions. Annealing in high salt solution causes interdiffusion which broadens the internal interface between the two slabs and allows for the calculation of the diffusion constant D of the polyanion. D at different annealing temperatures will be measured. Thus, the binding enthalpy between electrostatic monomer-monomer bonds can determined with an Arrhenius plot. Additionally, we will test different surface modifications for contrast enhancement and dedicate a few experiments to film swelling in different annealing solutions. Funding is by Deutsche Forschungsgemeinschaft (SFB 1270).
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The recommended format for citing this dataset in a research publication is in the following format:
HELM Christiane A.; AHRENS Heiko; GUTFREUND Philipp; KHURRAM Muhammad; NEUBER Sven and SILL Annekatrin. (2023). In-situ observation of diffusion in layer-by-layer polyelectrolyte films. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-2095
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