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Using a chitosan nanolayer as an efficient pH buffer to protect pH-sensitive supramolecular assemblies

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Brezhneva,  N.
Katja Skorb (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Möhwald,  Helmuth
Grenzflächen, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Skorb,  E. V.
Katja Skorb (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Andreeva, D. V., Kollath, A., Brezhneva, N., Sviridov, D. V., Cafferty, B. J., Möhwald, H., et al. (2017). Using a chitosan nanolayer as an efficient pH buffer to protect pH-sensitive supramolecular assemblies. Physical Chemistry Chemical Physics, 19(35), 23843-23848. doi:10.1039/C7CP02618H.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002E-17BF-4
Abstract
It is attractive to control the properties of macro objects and films by employing simple nanolayer composites, as in the case of nanoarchitectured Layer-by-Layer (LbL) coating. In this paper, we use chitosan as a surface-based pH buffer to protect adsorbed supramolecular fibres from pH-mediated disassembly. Protons are generated on a titania surface under illumination at 405 nm leading to an appreciable pH change on the surface. We find that supramolecular polymers that are highly sensitive to pH change will not disassemble after irradiation if a nanolayer of chitosan is present. We propose that chitosan can be used as an efficient pH-responsive protective layer for pH sensitive soft materials.