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

Author(s)
Andreeva, D. V.Kollath, A.Brezhneva, N.Sviridov, D. V.Cafferty, B. J.Moehwald, H.Skorb, E. V.
Issued Date
2017-09
DOI
10.1039/c7cp02618h
URI
https://scholarworks.unist.ac.kr/handle/201301/22778
Fulltext
http://pubs.rsc.org/en/Content/ArticleLanding/2017/CP/C7CP02618H#!divAbstract
Citation
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.19, no.35, pp.23843 - 23848
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.
Publisher
ROYAL SOC CHEMISTRY
ISSN
1463-9076
Keyword
IN-SITU FTIRAQUEOUS-SOLUTIONSTIO2LIGHTWATERNANOSTRUCTURESNANOCOMPOSITEOSCILLATIONPOLYMERSCONTACT

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