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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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| Authors: | Sviatlana A. Ulasevich Prof. Gerald Brezesinski Prof. Helmuth Möhwald Prof. Peter Fratzl Prof. Felix H. Schacher Dr. Sergey K. Poznyak Dr. Daria V. Andreeva Dr. Ekaterina V. Skorb |
| Affiliation: | 1. Max Planck Institute of Colloids and Interfaces, Potsdam, Germany;2. Friedrich-Schiller-Universit?t Jena, Institut für Organische Chemie und Makromolekulare Chemie, Germany), Jena Center for Soft Matter (JCSM), Friedrich-Schiller-Universit?t Jena, Jena, Germany;3. The Research Institute for Physical Chemical Problems, Belarusian State University, Minsk, Belarus;4. Center for Soft and Living Matter, Institute of basic science, Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea |
| 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. |
| Keywords: | layer-by-layer assembly polyelectrolytes stimuli-responsive materials TiO2 water splitting |