利用这一性能，该课题组使用具有图案化的微模板在SMP表面进行图案化的压缩，利用不同浸润性的组合制备出具有超疏水高粘附的表面，可以用于微液滴定位储存的使用，同时利用材料的形状记忆性能，使其回复至原始状态可以重新压缩“写入”新的图案，实现了“可擦写”微液滴储存芯片的应用。这种“可擦写”微液滴存储芯片解决了传统存储芯片图案定位只能“写入”一次的缺点，利用形状记忆性能使图案可以多次写入，达到材料表面的循环使用目的。同时该芯片技术还可以扩展至微流体运输、微流体反应器和液体收集等应用领域。

Application of the as-prepared surface as rewritable platform for droplet storage chip. (a) SEM image of the surface with micropit pattern viewed at a tilt angle of about 40°.(b) A water droplet can still be adhered on the pit position when the surface is turned face down, demonstrating high adhesive superhydrophobicity of the patterned surface. Because of the special memory ability in the hierarchical structures, different droplet storage programs can be obtained by designing different patterns through pressing/heating process.(c−h) Photos of droplets pinned on a vertical surface with patterns like letters "H", "I", "T", "A", "C", and "S", respectively, indicating that our surface can be used as the rewritable platform for designing structure-dependent patterned functional chips.

    该研究成果发表在ACS Nano上，第一作者是博士生吕通。通讯作者为哈尔滨工业大学刘宇艳教授和成中军副研究员。该工作得到国家自然科学基金的支持。