Front Cover: In article number 1900499 by Esben Thormann and co‐workers, multilayer films of chitosan and alginate dialdehyde demonstrate reversible swelling/shrinkage in response to variations in pH, due to the formation of chemical cross‐links during the layer‐by‐layer assembly. The pH‐responsiveness and swelling capacity are tunable by the pH at which the multilayer is fabricated, as well as the degree of oxidation of alginate dialdehyde.

中文翻译：

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壳聚糖/藻酸酯二醛多层膜具有调节的pH响应和膨胀性

封面：在Esben Thormann及其同事的文章1900499中，壳聚糖和海藻酸二醛的多层膜在pH值变化的情况下表现出可逆的溶胀/收缩，这是由于在层与层之间形成了化学交联部件。pH响应度和溶胀能力可通过制造多层膜的pH值以及藻酸盐二醛的氧化程度来调节。