Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14424, Potsdam, Germany.
Friedrich-Schiller-Universität Jena, Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstrasse 10, Germany), Jena Center for Soft Matter (JCSM), Friedrich-Schiller-Universität Jena, Philosophenweg 7, 07743, Jena, Germany.
Angew Chem Int Ed Engl. 2016 Oct 10;55(42):13001-13004. doi: 10.1002/anie.201604359.
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.
我们介绍了一个简单的概念，即光诱导的 pH 值变化，随后对相邻聚合物薄膜的机械性能进行了高幅度的操控。众所周知，二氧化钛表面的辐照会导致水的分解，这可以用来将环境 pH 值降低到 pH 4。因此，相邻的 pH 敏感聚合物薄膜的机械模量可以改变一个数量级以上。这种变化可以是局部的、持续数小时的，并可以在不破坏材料的情况下重复进行。
