Investigation of chain deformation 'flattening' in polyelectrolyte multilayers upon adsorption at solid interfaces
PEMs can be considered polyelectrolyte complexes at interfaces that are fabricated using “Layer-by-Layer” (LbL) assembly. Depending on various parameters, polyelectrolyte complexes in bulk possess either a "brush-like" or a "pancake" structure, it is not clear how structure formation in PEMs occurs through a stepwise assembly process. In contrast to polyelectrolyte behavior in solution, individual layers are thinner when deposited from salt free solutions and thicker when deposited at high salt concentrations. Multilayer films composed of poly(allylamine) (PAH) and deuterated as well as non-deuterated poly(styrenesulfonate) (PSS) will be prepared with a varying number of non-deuterated layers between the deuterated layers. In the deuterated layers, the percentage of deuteration will be adjusted from about 20% to 50%. After having established the feasibility of GISANS measurements on this sample in the foregoing experiment, now, a systematic study on the lateral polymer conformation is proposed under varying preparation conditions.
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HIGY Christophe; DECHER Gero; FELIX Olivier; FRAGNETO Giovanna; GUTFREUND Philipp; ROTHFELDER Marcel and SCHEIBELEIN Christoph. (2013). Investigation of chain deformation 'flattening' in polyelectrolyte multilayers upon adsorption at solid interfaces. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1645
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