Microarrays have attracted great interest due to their widespread applications in anti-icing, cell manipulation, and antibioadhesion. However, such arrays are typically fabricated with high-cost and time-consuming lithography techniques. Various kinds of new polymers have been developed to solve this problem. Nevertheless, most of the microarrays fabricated with these materials are usually static, lacking sufficient intelligence and therefore hindering their practical applications. Here, a new strategy is reported that introduces shape memory polymer (SMP) into microarray fabrication. The deformation and recovery of SMP microarrays was investigated, and they show robust controllability and stable surface wettability, as well as a high shape recovery ratio (∼91%) at microscale, even after more than ten cycles of “stretch-recovery” process. In addition, various microarrays with a series of continuously changeable microscales were replicated by using the patterned SMP film as a tunable mold. Specifically, the SMP mold not only shows excellent ability to replicate multiple microarrays with controlled and ordered microstructures via one specific SMP mold, but it also can be applied to various polymers with more than ten replicas. This universal strategy paves an avenue for the broad applications of SMP arrays in cell manipulation, water droplet manipulation and smart dry adhesives.

中文翻译：

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可调谐的形状记忆聚合物模具，可进行多次微阵列复制†

由于微阵列在防冰，细胞操纵和抗生物粘附方面的广泛应用，因此引起了极大的兴趣。然而，这种阵列通常利用高成本和费时的光刻技术来制造。已经开发出各种新型聚合物来解决该问题。然而，用这些材料制造的大多数微阵列通常是静态的，缺乏足够的智能，因此阻碍了它们的实际应用。在这里，报道了一种新的策略，该策略将形状记忆聚合物（SMP）引入了微阵列制造中。对SMP微阵列的变形和恢复进行了研究，即使在十多个“拉伸-恢复”过程之后，它们仍显示出强大的可控性和稳定的表面润湿性，以及在微观尺度上的高形状恢复率（〜91％）。另外，通过使用图案化的SMP膜作为可调模具，复制了具有一系列连续可变的微尺度的各种微阵列。具体而言，SMP模具不仅具有出色的复制能力，而且可以复制具有受控和有序微结构的多个微阵列通过一个特定的SMP模具，但它也可以应用于具有十多个复制品的各种聚合物。这种通用策略为SMP阵列在细胞处理，水滴处理和智能干胶中的广泛应用铺平了道路。