IBS Publications Repository: Light-Induced Water Splitting Causes High-Amplitude Oscillation of pH-Sensitive Layer-by-Layer Assemblies on TiO2

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Light-Induced Water Splitting Causes High-Amplitude Oscillation of pH-Sensitive Layer-by-Layer Assemblies on TiO2

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Title: Light-Induced Water Splitting Causes High-Amplitude Oscillation of pH-Sensitive Layer-by-Layer Assemblies on TiO2

Author(s): Sviatlana A. Ulasevich; Gerald Brezesinski; Helmuth Mçhwald; Peter Fratzl; Felix H. Schacher; Sergey K. Poznyak; Daria V. Andreeva; Ekaterina V. Skorb

Subject: layer-by-layer assembly, ; polyelectrolytes, ; stimuli-responsive materials, ; TiO2, ; water splitting

Journal: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.55, no.42, pp.13001 - 13004

Abstract: We introduce a simple concept of a light induced pH change, followed by high amplitude manipulation of the mechanical properties of an adjacent polymer film. Irradiation of a titania surface is known to cause water splitting, and this can be used to reduce the environmental pH to pH 4. The mechanical modulus of an adjacent pH sensitive polymer film can thus be changed by more than an order of magnitude. The changes can be localized, maintained for hours and repeated without material destruction. (c) 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim