Using a chitosan nanolayer as an efficient pH buffer to protect pH-sensitive supramolecular assemblies
Autor: | Daria V. Andreeva, Helmuth Möhwald, Brian J. Cafferty, Nadzeya Brezhneva, Ekaterina V. Skorb, Dmitry V. Sviridov, Anna Kollath |
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Rok vydání: | 2017 |
Předmět: |
chemistry.chemical_classification
Materials science Supramolecular chemistry General Physics and Astronomy Nanotechnology 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Buffer (optical fiber) 0104 chemical sciences Supramolecular polymers Chitosan chemistry.chemical_compound Adsorption chemistry Coating engineering Irradiation Physical and Theoretical Chemistry 0210 nano-technology Layer (electronics) |
Zdroj: | Physical Chemistry Chemical Physics |
ISSN: | 1463-9084 |
Popis: | 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. |
Databáze: | OpenAIRE |
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