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

D. V. Andreeva; A. Kollath; N. Brezhneva; D. V. Sviridov; B. J. Cafferty; H. Möhwald; E. V. Skorb

doi:10.1039/C7CP02618H

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

D. V. Andreeva,

^a A. Kollath,^b N. Brezhneva,^cd D. V. Sviridov,^c B. J. Cafferty,^e H. Möhwald^d and E. V. Skorb

*^df

Author affiliations

* Corresponding authors

^a Center for Soft and Living Matter, Institute of basic science, Ulsan National Institute of Science and Technology, 44919 Ulsan, Republic of Korea

^b Physical Chemistry II, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany

^c Belarusian State University, 4 Nezavisimosti ave., 220030 Minsk, Belarus

^d Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14424 Potsdam, Germany
E-mail: skorb@pikg.mpg.de

^e Department of Chemistry and Chemical Biology, Harvard University, 02138 Cambridge, MA, USA

^f Laboratory of Solution Chemistry of Advanced Materials and Technologies (SCAMT) ITMO University St. Petersburg, Russian Federation

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.

This article is part of the themed collection: Surface chemistry and interface science

Article information

https://doi.org/10.1039/C7CP02618H

Article type

Paper

Submitted

21 Apr 2017

Accepted

04 Jul 2017

First published

04 Jul 2017

This article is Open Access

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Phys. Chem. Chem. Phys., 2017,19, 23843-23848

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

D. V. Andreeva, A. Kollath, N. Brezhneva, D. V. Sviridov, B. J. Cafferty, H. Möhwald and E. V. Skorb, Phys. Chem. Chem. Phys., 2017, 19, 23843 DOI: 10.1039/C7CP02618H

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Physical Chemistry Chemical Physics

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

Abstract

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

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