A new shape memory hydrogel, which can be programmed with quadruple geometries when stimuli are applied sequentially, is presented. With a new redox-responsive stimulus coupled with two other common regulation mechanisms, this hydrogel shows multiple shape memory behaviours, which is promising for various applications, especially drug delivery.

中文翻译：

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Ca ²⁺，氧化还原和热响应性超分子水凝胶，具有可编程的四重形状记忆效应†

提出了一种新的形状记忆水凝胶，当顺序施加刺激时，可以用四倍的几何形状对其进行编程。通过新的氧化还原响应性刺激和其他两种常见的调节机制，这种水凝胶显示出多种形状记忆行为，有望用于各种应用，尤其是药物输送。