Emerging Applications of Superhydrophilic-Superhydrophobic Micropatterns
Emerging Applications of Superhydrophilic-Superhydrophobic Micropatterns
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DOI：
10.1002/adma.201204120
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发表时间：
2013-03-06
影响因子：
29.4
通讯作者：
Levkin, Pavel A.
中科院分区：
文献类型：
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作者：
Ueda, Erica;Levkin, Pavel A.
超亲水表面上的水扩散或吸收非常快，并且水接触角接近于零。我们在日常生活中会遇到超亲水材料（例如纸张、海绵、纺织品），它们在自然界中也无处不在（例如植物和树叶、猪笼草）。另一方面，完全不可润湿的超疏水表面上的水会形成球形液滴并轻松从表面滚落。超疏水表面最著名的例子之一是荷叶。创造新颖的超疏水表面带来了令人兴奋的新特性，例如完全防水、自清洁、油水分离和抗生物污染。然而，将超亲水性和超疏水性的这两种极端状态结合在同一表面上的精确二维微图案中，在从用于筛选的细胞、液滴和水凝胶微阵列到用于分离和诊断装置的表面张力限制微通道的各种应用中开辟了令人兴奋的新功能和可能性。在这份进展报告中，我们简要描述了超亲水-超疏水图案的制造方法，并重点介绍了目前正在探索的这些图案基材的一些较新和新兴的应用。我们还对当前和未来的应用进行了展望，这些应用将受益于使用这种超亲水-超疏水微图案。
Water on superhydrophilic surfaces spreads or is absorbed very quickly, and exhibits water contact angles close to zero. We encounter superhydrophilic materials in our daily life (e.g., paper, sponges, textiles) and they are also ubiquitous in nature (e.g., plant and tree leaves, Nepenthes pitcher plant). On the other hand, water on completely non-wettable, superhydrophobic surfaces forms spherical droplets and rolls off the surface easily. One of the most well-known examples of a superhydrophobic surface is the lotus leaf. Creating novel superhydrophobic surfaces has led to exciting new properties such as complete water repellency, self-cleaning, separation of oil and water, and antibiofouling. However, combining these two extreme states of superhydrophilicity and superhydrophobicity on the same surface in precise two-dimensional micropatterns opens exciting new functionalities and possibilities in a wide variety of applications from cell, droplet, and hydrogel microarrays for screening to surface tension confined microchannels for separation and diagnostic devices. In this Progress Report, we briefly describe the methods for fabricating superhydrophilic-superhydrophobic patterns and highlight some of the newer and emerging applications of these patterned substrates that are currently being explored. We also give an outlook on current and future applications that would benefit from using such superhydrophilic-superhydrophobic micropatterns.